ЛАЗЕРНЫЙ ПРИБОР

ЛАЗЕР

... 1. Лазер (1, 201) для испускания лазерного излучения в видимом спектральном диапазоне, содержащий:- лазерный резонатор (7, 8; 207, 208), отличающийся тем, что содержит- анизотропный кристалл (2; 202), легированный редкоземельными элементами, содержащий 5d-4f переход, при этом кристалл расположен внутри лазерного резонатора (7, 8; 207, 208);- источник (3; 203) светового излучения накачки для накачки кристалла (2; 202) посредством освещения кристалла (2; 202) световым излучением накачки для генерации лазерного излучения в видимом спектральном диапазоне путем использования 5d-4f перехода.2. Лазер по п.1, в котором кристалл (2; 202) и источник (3; 203) светового излучения накачки выполнены таким образом, что генерируемое лазерное излучение находится в пределах зеленого диапазона длин волн.3. Лазер по п.1, в котором кристалл (2; 202) выполнен таким образом, что содержит особую ось (22; 222) индикатрисы, при этом сумма сечения вынужденного излучения в видимом диапазоне длин волн на 5d-4f переходе ...

Optischer Faserkoppler, Herstellungsverfahren dafür und optischer Verstärker mit diesem Faserkoppler

Endgepumpter Laser mit Zick-Zack-Anordnung um Verstärkungsmedium

PROCEDURE FOR THE PRODUCTION OPTICAL TRANSVERSE ELECTROMAGNETIC WAVE

PROCESS FOR FABRICATION OF OPTICAL WAVEGUIDES

Thin-film large-area coherent light source, filter and amplifier apparatus and method

WAVEGUIDE DESIGN FOR LINE SELECTION IN FIBER LASERS AND AMPLIFIERS

Rare earth doped fiber lasers can be robust and efficient sources of high quality light, but are usually limited to the highest gain transitions of the active species. But rare earths typically possess a multitude of potentially useful transitions that might be accessed if the dominant transition can be suppressed. In fiber lasers this suppression is complicated by the very high net gain the dominant transitions exhibit; effective suppression requires some mechanism distributed along the length of the fiber. We have developed a novel waveguide with resonant leakage elements that frustrate guidance at well-defined and selectable wavelengths. Based on this waveguide, we have fabricated a Large Mode Area Neodymium doped fiber with suppression of the four-level transition around 1060 nm, and demonstrated lasing on the three-level transition at 930 nm with good efficiency.

SECOND HARMONIC GENERATION AND SELF FREQUENCY DOUBLING LASER MATERIALS COMPRISED OF BULK GERMANOSILICATE AND ALUMINOSILICATE GLASSES

... 2112138 9300605 PCTABS00019 A method for preparing a material so as to exhibit second harmonic generation for optical radiation that passes through the material. The method includes a first step of providing a bulk glass comprised of substitutionally doped silica and a charge transfer dopant. The bulk glass is prepared for frequency doubling in accordance with a method that includes a step of irradiating the bulk glass with optical radiation having a first wavelength and a second wavelength, the bulk glass being irradiated for a period of time sufficient to obtain a desired amount of conversion efficiency of the first wavelength into the second wavelength. The silica is substitutionally doped with an element selected from the group consisting of Ge and Al, and the charge transfer dopant is selected from the group consisting of Ce3+, Nd3+, and Eu2+. In another embodiment of the invention the silica is substitutionally doped with Ge and the charge transfer dopant is comprised of naturally ...

FIBEROPTIC DOPEE OUT OF RARE EARTHS INSENSITIVE WITH THE IRRADIATIONS

SILICON NITRIDE THIN FILM FOR OPTICAL DEVICE AND FABRICATING METHOD THEREOF TO IMPROVE LIGHT EMITTING EFFICIENCY OF RARE EARTH ELEMENT

PURPOSE: A silicon nitride thin film for an optical device is provided to improve light emitting efficiency of a rare earth element by exciting a rare earth element by an amorphous silicon quantum dot having higher light emitting efficiency than a crystalline silicon nano dot. CONSTITUTION: An amorphous silicon quantum dot and a rare earth element are distributed together in a silicon nitride thin film for an optical device. The rare earth element is excited by the amorphous silicon quantum dot to emit light. The rare earth element is Er, Eu, Gd, Tb or Yb. The amorphous silicon quantum dot is 1-5 nanometer in size. © KIPO 2006 ...

TRANSVERSE PUMPED LASER AMPLIFIER ARCHITECTURE

An optical gain architecture includes a pump source and a pump aperture. The architecture also includes a gain region including a gain element operable to amplify light at a laser wavelength. The gain region is characterized by a first side intersecting an optical path, a second side opposing the first side, a third side adjacent the first and second sides, and a fourth side opposing the third side. The architecture further includes a dichroic section disposed between the pump aperture and the first side of the gain region. The dichroic section is characterized by low reflectance at a pump wavelength and high reflectance at the laser wavelength. The architecture additionally includes a first cladding section proximate to the third side of the gain region and a second cladding section proximate to the fourth side of the gain region.

Laser-diode-excited laser apparatus, fiber laser apparatus, and fiber laser amplifier in which laser medium doped with one of Ho3+, Sm3+, Eu3+, Dy3+, Er3+, and Tb3+ is excited with GaN-based compound laser diode

A solid-state laser crystal constituting a laser-diode-excited solid-state laser apparatus or an optical fiber constituting a fiber laser apparatus or fiber laser amplifier is doped with one of Ho3+, Sm3+, Eu3+, Dy3+, Er3+, and Tb3+ so that a laser beam is emitted from the solid-state laser crystal or the optical fiber, or incident light of the fiber laser amplifier is amplified, by one of the transitions from5S2to5I7, from5S2to5I8, from4G5/2to6H5/2, from4G5/2to6H7/2, from4F3/2to6H11/2, from5D0to7F2, from4F9/2to6H13/2, from4F9/2to6H11/2, from4S3/2to4I15/2, from2H9/2to4I13/2, and from5D4to7F5. The above solid-state laser crystal or optical fiber is excited with a GaN-based compound laser diode.

Rare earth-doped medium with photorefractive grating as compact laser source

A compact, broadband laser source is realized by using a rare earth dopant to define a laser gain spectrum and by using holographic imprinting techniques to form a wavelength selection element for selecting a particular wavelength from within the gain spectrum. Artificial broadening of the gain spectrum can be achieved by establishing varied (e.g., randomized) domains of space charge within a rare earth-doped laser gain medium. Compactness can be enhanced by fabricating the laser gain medium and wavelength selection elements within a single member, such as a photo-refractive crystal substrate. Flexibility in the selection of a wavelength can be obtained by holographically imprinting multiple sets of wavelength selection elements.

Devices with optical gain in silicon

A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that form a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.

Polarization-maintaining optical fiber amplifier employing externally applied stress-induced birefringence

A method of forming a linear polarization-maintaining optical fiber for use in an amplifier, the method comprising the steps of:providing a rare-earth-doped non-polarization-maintaining optical fiber having one or more cladding layers and having a random birefringence;providing a mandrel having a selected diameter;coiling said non-polarization-maintaining optical fiber under a selected tension around said mandrel to induce a linear birefringence greater than said random birefringence in said non-polarization-maintaining optical fiber thereby forming a polarization-maintaining optical fiber;wherein said mandrel diameter is chosen to avoid significant bend loss;wherein said rare-earth dopant is selected from the group consisting Nd<3+>, Yb<3+>, Pr<3+>, Ho<3+>, Er<3+>, Sm<3+> and Tm<3+>;wherein said mandrel diameter is selected to be from about 0.1 cm to about 10 cm; andwherein said tension is chosen to avoid undesirable weakening of said non-polarization-maintaining fiber.

Laser with a gain medium layer doped with a rare earth metal with upper and lower light-confining features

One illustrative laser disclosed herein includes a gain medium layer having a first width in a transverse direction that is orthogonal to a laser emitting direction of the laser, and an upper light-confining structure positioned above an upper surface of the gain medium layer, wherein the upper light-confining structure has a second width in the transverse direction that is equal to or less than the first width and comprises at least one material having an index of refraction that is at least 2.0. The laser also includes a lower light-confining structure positioned below a lower surface of the gain medium layer, wherein the lower light-confining structure has a third width in the transverse direction that is equal to or less than the first width and comprises at least one material having an index of refraction that is at least 2.0.

Solid-state suspension laser

A solid-state suspension laser. The novel laser includes a gain medium comprised of a plurality of solid-state gain particles suspended in a fluid. The laser also includes a pump source for pumping the gain particles and a resonator for amplifying and outputting laser light generated by the gain medium. In an illustrative embodiment, the gain medium is adapted to flow, and the pumping of the gain medium occurs outside of the resonator. The flow velocities and the densities of the gain particles in the gain medium can be optimized for optimal absorption efficiency during the pumping and/or for optimal extraction efficiency in the resonator as well as for overall laser performance optimization, including power, efficiency and beam quality scalability.

DOPED OR ALLOYED MATERIALS AND HOT ISOSTATIC PRESSING METHOD OF MAKING SAME

A doped substrate having a substrate comprising at least one of a glass material, a single crystal material, a poly-crystalline material, a ceramic material, or a semiconductor material. The doped substrate includes a dopant comprising one or more transition metals, one or more rare earth elements, or a combination of both, the doped substrate characterized in that a spectral laser output of the doped substrate exhibits a nominally single frequency having a linewidth less than about 5 nm.

AMORPHOUS COMPOUNDS FOR WIDEBAND OPTICAL AMPLIFIERS

СЛОЖНЫЙ ГАФНАТ ЛИТИЯ-ЛАНТАНА В КАЧЕСТВЕ ЛЮМИНЕСЦЕНТНОГО МАТЕРИАЛА ДЛЯ ПРЕОБРАЗОВАНИЯ МОНОХРОМАТИЧЕСКОГО ИЗЛУЧЕНИЯ ЛАЗЕРА И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Изобретение относится к новым соединениям класса сенсибилизированных люминофоров на основе неорганических кристаллических соединений, а именно к сложному гафнату лития-лантана состава LiLaNdHoErDyHfO, где x=2.5⋅10-1⋅10, y=1.6⋅10-4.7⋅10, z=1.5⋅10, n=1.2⋅10-4.7⋅10. Также предложен его способ получения. Полученный состав используется в качестве люминесцентного материала для преобразования монохроматического излучения лазера с длиной волны 808 нм в серию эмиссионных линий 2-2.3 мкм, 2.5-2.9 мкм, 3.1-3.35 мкм. 2 н.п. ф-лы, 3 ил., 3 пр.

Halbleiterlaser bestehend aus mit seltenen Erden dotiertem Diamant

Solid state laser with multiple cores coupled by fold optics

Light-emitting systems

SOLID STATE LASER WITH MULTIPLE CORES COUPLED BY FOLD OPTICS

OPTICAL ONE, ELECTROMAGNETIC WAVES STRENGTHENING CONCENTRATOR

REINFORCEMENT MEDIUM WITH LOW PHONON ENERGY AND ITS PRODUCTION

L-band amplification with detuned 980nm pump

Array laser radar light splitting device and light splitting method thereof

An array light source light splitting device and a light splitting method thereof. The light splitting device comprises: a seed source (10) for inputting signal light; an optical fiber amplifier (20) connected to the seed source (10); and an optical splitter connected to the optical fiber amplifier (20). The optical splitter (30) is provided with N optical fibers, N being a natural number; the optical splitter (30) splits signal light from the seed source (10) into N beams and outputs same. Signal light from the seed source (10) passes through the optical fiber amplifier (20) to have the power amplified, and then passes through the optical splitter (30) to be changed into multiple beams of signal light to be output. The repetition frequency of 1550 nm laser can reach megahertz, and the laser has a high water absorption coefficient. The waveband laser has a high damage threshold to the human eyes when being radiated to the human eyes, and therefore has an eye-safe characteristic. The light ...

SEMICONDUCTOR LASERS COMPRISING RARE EARTH METAL-DOPED DIAMOND

In general, the semiconductor laser device of the present invention comprises an emitting element comprising a doped diamond, which is doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal. The semiconductor laser device assembly according to the present invention comprises an emitting element of a doped diamond, which is a diamond doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal, and a thermal releasing element of a substantially undoped diamond, on which the semiconductor laser device are placed.

AMPLIFYING OPTICAL FIBER CAPABLE OF AMPLIFYING TRANSFERRED OPRICAL SIGNALS AND A MANUFACTURING METHOD THEREOF

PURPOSE: An amplifying optical fiber and a manufacturing method thereof according to the present invention are provided to use as a laser of high speed transmission line amplifiers. CONSTITUTION: A core(10) appropriates to a transmission of an optical signal and an amplification. An optical cladding(11) surrounds the core and restrict the optical signal transmitted to the core. The core is formed into a main matrix and contains nano particle(5) doped into rare earth elements. COPYRIGHT KIPO 2010 ...

AN ALL-FIBER PULSED FIBER LASER MODULE

The present invention relates to an all-fiber pulsed fiber laser module for obtaining high- definition laser pulses with a convenient method, and an all- fiber pulsed fiber laser module is provided, comprising a resonant cavity having a laser oscillatory fiber between a first FBG and a second FBG in which the reflectivity of the first FBG is larger than the reflectivity of the second FBG; a first pumping light source for providing a first pumping light to obtain oscillatory laser by exciting the laser oscillatory fiber; and an all-fiber variable optical attenuator for inducing a periodic Q-switching of the oscillatory laser or the first pumping light to generate pulsed laser.

FIBER LASER ARRANGEMENT

The present invention provides a system, which comprises a fiber laser (1) for generation of laser radiation, and an applicator (8) coupled with the fiber laser (1), the applicator (8) being adapted for delivery of laser radiation from the fiber laser (1) to an area of interest (22) and comprising an endoscopic fiber (7) or bare fiber (7).

DEVICES WITH OPTICAL GAIN IN SILICON

A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that from a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.

ERBIUM DOPED FIBERS FOR EXTENDED L-BAND AMPLIFICATION

The specification describes rare earth doped fiber amplifier devices for operation in the extended L-band, i.e. at wavelengths from 1565 nm to above 1610 nm. High efficiency and flat gain spectra are obtained using a high silica based fiber codoped with Er, Al, Ge, and P and an NA of at least 0.15.

FIBER LASER DEVICE

A fiber laser device (1) includes an amplification optical fiber (10) having a core (11) doped with an active element, a first FBG (35) reflecting at least a part of light emitted from the active element, and a second FBG (45) reflecting the light reflected off the first FBG (35) at a reflectance lower than the reflectance of the first FBG (35). The wavelength of a fundamental-mode light beam reflected off the first FBG (35) and the wavelength of a fundamental-mode light beam reflected off the second FBG (45) are matched with each other. The wavelengths of higher-mode light beams reflected off the first FBG (35) and the wavelengths of higher-mode light beams reflected off the second FBG are unmatched with each other.

LED PUMPED LASER DEVICE AND METHOD OF USE

The present invention provides an apparatus and method for pumping solid-state lasers and amplifiers. More specifically, to a method and apparatus for pumping solid-state lasers and amplifiers using Light Emitting Diode (LED) arrays. In one embodiment, the apparatus comprises a gain medium, a plurality of LEDs in optical communication with the gain medium to excite the gain medium, the plurality of LEDs arranged in an LED array, a driving circuit to energize the LED array, and a thermoelectric cooler to reduce the temperature of the LED array, wherein the gain medium is pumped by the LED array to emit a laser light. 1. A solid-state laser device , comprising:a gain medium;a plurality of LEDs in optical communication with the gain medium to excite the gain medium, the plurality of LEDs arranged in an LED array;a driving circuit to energize the LED array; anda cooler to reduce the temperature of the LED array;wherein the gain medium is pumped by the LED array to emit a laser light.2. The device of claim 1 , wherein active ions in the solid-state gain medium are selected from the group consisting of Ce claim 1 , Nd claim 1 , Ce claim 1 , Yb claim 1 , Ce claim 1 , Er claim 1 , Pr claim 1 , Tiand Cr.3. The device of claim 1 , wherein the LED array comprises semi-polar LEDs.4. The device of claim 1 , wherein at least a portion of the laser device operates under cryogenic conditions.5. The device of claim 1 , further comprising a cryogenically-cooled amplifier module.6. The device of claim 1 , wherein the driving circuit outputs square electrical current pulses to energize the LED array.7. The device of claim 1 , wherein the cooler is mounted to a back surface of the LED array.8. The device of claim 1 , wherein the cooler is a microchannel cooling device interconnected to a rear surface of the LED array.9. The device of claim 1 , wherein the plurality of LEDs emit linearly polarized light.10. The device of claim 1 , wherein the LED array is a two-dimensional array.11. The ...

QUANTUM DEVICES COMPRISING LANTHANIDE COMPLEXES

A quantum device for interfacing Lanthanide ions with optical fields or microwave fields or both. The device includes waveguides or resonators or both for optical fields or microwave fields or for both. The device includes at least one surface to which a single customized Lanthanide molecular complex, or an ensemble, layer, multilayer or crystal of such, are attached or bonded. This places the Lanthanide ions within the optical or microwave fields or both. The ability to customize the molecular structure around each Lanthanide ion, and to control their orientation and position and nano-environment in general, enables minimizing the host lattice effects and non-radiative loss channels for each ion, and increasing their homogeneity. Accordingly, the advantages of the present invention include reduced inhomogeneities, narrower linewidths, extended fluorescence and coherence times, and higher operation temperatures. Devices which benefit from the present invention include lasers, amplifiers ...

Optical Waveguide as Amplifier Fibre for High-Performance Operation

The invention relates to an optical waveguide () as a laser medium or as a gain medium for high-power operation, wherein the optical waveguide () is an optical fiber, the light-guiding core of which, at least in sections, is doped with rare earth ions. It is an object of the invention to provide an optical waveguide as a laser or a gain medium, and a laser/amplifier combination realized therewith, in which the output signal of the laser or gain medium is better stabilized. The invention achieves this object by virtue of the maximum small signal gain of the optical waveguide () being up to 60 dB, preferably up to 50 dB, more preferably up to 40 dB, even more preferably up to 30 dB, on account of the concentration of the rare earth ions and/or the distribution thereof in the light-guiding core. Moreover, the invention relates to the use of such an optical waveguide as an amplifier fiber () in a laser/amplifier combination. 1. Optical waveguide as a laser medium or a gain medium for high-power operation , wherein the optical waveguide is an optical fiber , the light-guiding core of which , at least in sections , is doped with rare earth ions ,wherein the maximum small signal gain of the optical waveguide is up to 60 dB, preferably up to 50 dB, more preferably up to 40 dB, even more preferably up to 30 dB, on account of at least one of the concentration of the rare earth ions and the distribution thereof in the light-guiding core.2. Laser/amplifier combination comprising a laser , an amplifier fiber and a pump light source , wherein the pump light source optically pumps the amplifier fiber and wherein the amplifier fiber amplifies the radiation of the laser propagating therein , wherein the core of the amplifier fiber guiding the laser radiation , at least in sections , is doped with rare earth ions ,wherein the maximum small signal gain of the amplifier fiber is up to 60 dB, preferably up to 50 dB, more preferably up to 40 dB, even more preferably up to 30 dB, on ...

SOLID STATE RING LASER GYROSCOPE USING RARE-EARTH GAIN DOPANTS IN GLASSY HOSTS

A solid state ring laser gyroscope comprises a laser block including a resonant ring cavity having an optical closed loop pathway; a plurality of mirror structures mounted on the block and including respective multilayer mirrors that reflect light beams around the closed loop pathway; and a pump laser assembly in optical communication with the closed loop pathway through one of the mirror structures. One or more of the multilayer mirrors includes a rare-earth doped gain layer operative to produce bidirectional optical amplification of counter-propagating light beams in the closed loop pathway. In some embodiments, the gain layer comprises a rare-earth dopant other than neodymium that is doped into a glassy host material comprising titania, tantalum oxide, alumina, zirconia, silicate glass, phosphate glass, tellurite glass, fluorosilicate glass, or non-oxide glass. Alternatively, the gain layer can comprise a neodymium dopant that is doped into a glassy host material other than silica.

Verstärkungsmedium mit niedriger Phononenenergie und dessen Herstellung

LASER MIT EINEM VERTEILTEN VERSTÄRKUNGSMEDIUM

VERFAHREN ZUR HERSTELLUNG OPTISCHER WELLENLEITER

Optical amplifiers

OPTICAL WAVEGUIDE LASER COMPRISING BRAGG GRATINGS

A Bragg Grating optical waveguide laser source comprising at least one Bragg grating in a rare earth doped waveguide and an optical pump source coupled to said doped waveguide, said Bragg gratings having at least two different peak reflection wavelengths and at least one of said Bragg gratings comprising a phase-shift and a phase-shift actuator being coupled to the phase-shift for controlled application of changes in the phase-shift thus activating or deactivating the corresponding Bragg grating waveguide laser.

GE-GA-S-BASED GLASS COMPOSITION HAVING LIGHT AMPLIFYING CHARACTERISTIC AND APPARATUS FOR OPTICAL COMMUNICATIONS USING THE SAME

A Ge-Ga-S-based glass composition having a light amplifying characteristic and an apparatus for optical communications using the glass composition are provided. The present invention includes a sulfur-poor Ge-Ga-S based host glass which includes less S than glass on a composition line of GeS2-Ga2S3 and a rare earth active material doped on the host glass for luminescence and light amplification. Here, Ga of no more than about 10 mol% is included in the host glass. Also, Pr3+ ions are used as the rare earth active material. Furthermore, for stable vitrification and a blue shift of a short wavelength absorption band, a vitrification stabilizer such as Br and 1 is added to the host glass. Also, the present invention includes an apparatus for performing optical communications such as a light amplifier using optical fiber comprised of the glass composition including the S-poor Ge-Ga-S host glass which includes less S than a glass on a composition line of GeS2-Ga2S3 and the rare earth active ...

POLYMERIC OPTICAL WAVEGUIDE DOPED WITH A LANTHANIDE-SENSITIZER COMPLEX

The invention relates to a polymeric waveguide comprising a lanthanide ionsensitizer complex, characterized in that the lanthanide ion is preferably neodymium(III) ion (Nd3+), ytterbium(III) ion (Yb3+), or erbium(III) ion (Er3+), and the sensitizer absorbs in the 400-1200 nm region, and preferably in the 600-1000 nm region. The invention also relates to an optical device comprising the same.

PROCESS FOR FABRICATION OF OPTICAL WAVEGUIDES

A method for manufacturing an optical waveguide device in accordance with the present invention includes the steps of depositing a lower cladding layer (114); coating a photoresist layer (118) directly on the lower cladding layer; patterning the photoresist layer to create channels (117); depositing a core layer (116), wherein a first portion of the core layer is deposited inside the channels and a second portion overlays the patterned photoresist layer; removing the patterned photoresist layer and the second portions of the core layer overlaying the patterned photoresist layer; and depositing an upper cladding layer (120). © KIPO & WIPO 2007 ...

OPTICAL FIBER FEMTOSECOND LASER RESONATOR AND OPTICAL FIBER FEMTOSECOND LASER DEVICE INCLUDING SAME

The present invention provides an optical fiber femtosecond laser resonator and an optical fiber femtosecond laser device including the same. The present invention includes: a laser diode pumping light corresponding to an absorption light wavelength of a gain medium; a wavelength division multiplexer inducing the light, pumped by the laser diode, into the gain medium; a single mode optical fiber used as a Kerr medium for nonlinear polarized rotation to the light induced into the Kerr medium; a polarization controller controlling the polarization of the light which has performed the nonlinear polarized rotation; a first selective reflecting part mode-locked by matching a polarization direction of the light, polarized by the polarization controller, with a first axis or second axis, and reflecting the light at predetermined reflectivity; and a second selective reflecting part selectively reflecting or outputting the light in accordance with the pulse width of light generated from the resonator ...

Arrayed optical device having enhanced pump efficiency

A SYSTEM AND METHOD FOR AN IMPROVED LIGHT-EMITTING DEVICE

The improved light-emitting device may include a waveguide made with Si nanocrystals doped with optically active elements. The improved light-emitting device may be suitable for use in chip-to-chip and on-chip interconnections.

A CO-DOPED UP-CONVERSION LASER SYSTEM

The invention relates to a co-doped upconversion laser system comprising a host-material, whereas the host material is made of at least one crystal material and/ or of a glass material, which features a low phonon energy, whereas said host material comprises a dopant made of Erbium (Er3+), which is pumped by laser light with a single wavelength in the infrared wavelength range, whereas said host material furthermore comprises at least one co-dopant made of Terbium (Tb3+) or Samarium (Sm3+), in order to emit laser radiation in the range of at least one visible wavelength. This system provides a co-doped upconversion laser system featuring an elimination of coulour centres, a reduced re-absorption of the laser radiation and the emission of laser light in the range of visible wavelengths.

SECOND HARMONIC GENERATION AND SELF FREQUENCY DOUBLING LASER MATERIALS COMPRISED OF BULK GERMANOSILICATE AND ALUMINOSILICATE GLASSES

A method for preparing a material so as to exhibit second harmonic generation for optical radiation that passes through the material. The method includes a first step of providing a bulk glass comprised of substitutionally doped silica and a charge transfer dopant. The bulk glass is prepared for frequency doubling in accordance with a method that includes a step of irradiating the bulk glass with optical radiation having a first wavelength and a second wavelength, the bulk glass being irradiated for a period of time sufficient to obtain a desired amount of conversion efficiency of the first wavelength into the second wavelength. The silica is substitutionally doped with an element selected from the group consisting of Ge and Al, and the charge transfer dopant is selected from the group consisting of Ce3+, Nd3+, and Eu2+. In another embodiment of the invention the silica is substitutionally doped with Ge and the charge transfer dopant is comprised of naturally existing Ge defects. The bulk ...

MEANS FOR PRODUCING AND AMPLIFYING OPTICAL ENERGY

All optical inverter/amplifier

The present invention provides an optical function device which is capable of inverting and amplifying an optical signal of the optical communication wavelength band, and executing operation of an image optical signal, and is operable in a wide temperature range, said optical function device composed of a light transmitting medium containing a rare earth element, comprising a portion thereof doped with 1x1023 per 1 m3 or more of the rare earth element for inverting an optical signal and a portion thereof doped with 1x1021 per 1 m3 or more of the rare earth element for amplifying the optical signal with an excitation light superposed thereto.

Devices with optical gain in silicon

A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that form a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.

Amplification module for an optical printed circuit board and an optical printed circuit board

The invention provides an amplification module for an optical printed circuit board, the optical printed circuit board comprising plural polymer waveguide sections from independent waveguides, each of the sections being doped with an amplifying dopant, wherein the plural waveguide sections are routed so as to pass through an amplification zone in which the plural polymer waveguide sections are arranged close or adjacent to one another, the amplification module comprising: a pump source comprising plural light sources arranged to provide independently controllable levels of pump radiation to each of the plural waveguide sections. In an embodiment, the amplification module also includes plural polymer waveguide sections corresponding to the plural polymer waveguides of the printed circuit board on which in use the amplification module is to be arranged, each of the sections being doped with an amplifying dopant.

Q-switched laser device

When an excitation light is entered in a laser medium including a doped (containing rare earth element) YAG, the vicinity of the excitation light entry face is locally heated which generates a birefringence, causing degradation of linear polarization of emitted laser. To avoid such a phenomenon, it was necessary to make the excitation light pulsed and slow down the repetition rate of the pulse. In this device, an undoped YAG is bonded to a excitation light entry face of the laser medium made of a doped YAG. By arranging the YAG <100> axis so as to extend along the optical axis of the laser oscillation system, a linearly polarized pulse laser can be obtained.

LIGHT-EMITTING SYSTEMS

A light-emitting system comprises a rare earth-containing organic light-emitting device (10, 11, 12, 13) fabricated on a silicon-based substrate (1). The light-emitting device is associated with a resonant cavity which may be in the form of a ridge or buried ridge waveguide (6). A diode (27) may form a modulator region (26) for injection of free carriers into the waveguide. This changes the refractive index or local absorption of the resonant cavity and thus allows switching of the system. The system is preferably a laser operating at about 1.5 ¿m although other wavelengths may be used. The wavelength is selected by the rare earth used.

Способ получения мало агломерированного наноразмерного прекурсора для синтеза твердых растворов иттрий-алюминиевого граната с оксидами редкоземельных элементов

FIELD: manufacturing technology.SUBSTANCE: invention relates to the technology of obtaining compounds of complex oxides with a garnet structure containing rare-earth elements, which can be used in the technology of synthesis of optical ceramic materials of laser quality when creating active bodies of solid-state lasers of different geometries. Method of obtaining a small agglomerated nano-sized precursor for synthesis of solid solutions of yttrium-aluminum garnet with oxides of rare-earth elements (REE) involves preparation of a mother solution of salt cations of specified composition, based on formula (YREE)AlO, where x is fraction of rare-earth element cation or sum of fractions of REE cations introduced into yttrium-aluminum garnet and substituting yttrium cations by dissolving chlorides or sulphates of yttrium, aluminum and rare-earth metals in water with subsequent evaporation to reduction of initial volume by 2 times, at solution temperature of 125 °C; dispersion of obtained mother solutions in mixture of aqueous ammonia solution with 25 % concentration and hydrogen peroxide of 30–40 % concentration in ratio of volumes of ammonia solution:solution of hydrogen peroxide (6–2):1 with subsequent cooling to 0 °C of obtained precipitate, which is decanted in deionised water to pH=7 and then 2–3 portions of hydrogen peroxide of 30–40 % concentration, wherein the last stage of decantation and washing is carried out with hydrogen peroxide of the same concentration, followed by drying in a vacuum drying cabinet at temperature of 60–80 °C.EFFECT: method of producing less agglomerated nano-sized precursor powders is simple, as a result of its use, the time for obtaining the end product is reduced, homogeneity and fineness of the obtained product is increased.1 cl, 7 dwg, 1 tbl, 5 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C30B 29/28 (2006.01) C01F 1/00 (2006.01) C01F 7/02 (2006.01) C01F 17/00 (2006.01) C04B 35/44 (2006.01) C04B 35/50 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА C04B ...

Gegenstand oder System mit optischer Vorrichtung auf Siliziumbasis.

VERFAHREN ZUR HERSTELLUNG OPTISCHER WELLENLEITER

Endgepumpter Laser mit Zick-Zack-Anordnung im Verstärkungsmedium

Optical transmission

A spacecraft or satellite optical transmission apparatus 10 includes an optical fiber 11 and at least one optical pump source 14 operatively coupled to provide pump energy to the optical fiber 11. The optical fiber 11 has an active trivalent dopant such as erbium and at least one passive trivalent dopant such as lanthanum, aluminium or phosphorus. The apparatus is designed to be resistant to hazardous radiation in the form of solar particle events (SPEs) and galactic cosmic rays (GCR) encountered in deep space. The active and passive dopants may form a trivalent matrix. The apparatus may also be used for transmitting electromagnetic radiation in a high radiation environment such as a nuclear reactor facility or near a high energy physics (HEP) apparatus.

DIODE LASER CHIP WITH TRANSVERSE ELECTROMAGNETIC WAVE

Laser diode chip with waveguide

Integrated optical waveguide structures

AMORPHOUS COMPOUNDS FOR WIDEBAND OPTICAL AMPLIFIERS

In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide (810) made from a rare-earth-doped amorphous material (e.g., erbium-doped yttrium aluminum oxide material). The optical input signals include optical signals having wavelengths over a range of at least 80 nanometers, and, preferably, over a range of at least 160 nanometers. Pump light (830) is applied to the optical waveguide (810) to cause the waveguide (810) to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified within the waveguide (810) to provide amplified optical signals over the extended 80-160-nanometer range, including, in particular, optical signals having wavelengths at one end of the range and optical signals having wavelengths at a second end of the range.

ND3+ FIBER LASER AND AMPLIFIER

An Nd3+ optical fiber laser and amplifier operating in the wavelength range from 1300 to 1450 nm is described. The fiber includes a rare earth doped optical amplifier or laser operating within this wavelength band is based upon an optical fiber that guides light in this wavelength band. The waveguide structure attenuates light in the wavelength range from 850 nm to 950 nm and from 1050 nm to 1150 nm.

AN UPCONVERSION ACTIVE GAIN MEDIUM AND A MICRO-LASER ON THE BASIS THEREOF

An upconversion active gain medium including a crystal host doped with two groups of active ions capable of producing either blue or ultraviolet lasing radiation at room temperature from single band infrared pumping radiation that is continuous or quasi-continuous is disclosed. An upconversion micro-laser incorporating a chip of said upconversion active gain medium, an optical cavity for resonating at least said lasing radiation and a small size pumping source is disclosed too. The pumping radiation energy is applied to the crystal host by means of a beam or a set of beams of said pumping radiation to be absorbed by sensitizer ions and provide the energy transfer to the activator ions. The crystal host is made of a new class of materials the composition thereof being arranged to be compatible with the preferable upconversion mechanism for increasing efficiency and providing stability and reproducibility of the micro-laser parameters. Said crystal host may be arranged to produce said lasing ...

END PUMPED ZIG-ZAG SLAB LASER GAIN MEDIUM

An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45.degree. angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with a amplified light. In order to confine the absorption of the pumped light to the center portion ...

MANUFACTORING PROCESS Of a VITREOUS MATERIAL DOPES AND INTENDS FOR AMPLIFICATION OPTICAL OR LASER WAVES

L'invention concerne un procédé de fabrication d'un matériau vitreux dopé par au moins une terre rare à une concentration atomique (co ) et destiné à être utilisé, en particulier, pour l'amplification d'ondes optiques ou d'ondes lasers.

MANUFACTORING PROCESS Of a VITREOUS MATERIAL DOPES AND INTENDS FOR AMPLIFICATION OPTICAL OR LASER WAVES

LASER DIODE CHIP WITH WAVEGUIDE

Disclosed is a laser having a laser diode coupled with a passive intra-cavity tapered waveguide. © KIPO & WIPO 2007 ...

OPTICAL POWER EQUALIZER WITH GAIN PROVIDING SCHEME

PURPOSE: An optical power equalizer with a gain providing scheme is provided to amplify a signal light and equalize an optical channel-classified power. CONSTITUTION: A plurality of pumping optical sources(212) provide inter-different gains to optical channel-classified signal lights, and equalize channel-classified powers of the optical channel-classified signal lights. The pumping optical sources(212) are operated by an upper pumping scheme. A demultiplexer(200) separates the power of a signal light having a power in which is not equalized according to optical channels. A plurality of waveguides(210) pass the optical powers separated by the demultiplexer(200). The pumping optical sources(212) are installed on a plurality of the waveguides(210), for providing inter-different gains according to channels. A multiplexer(202) adds signal channels equalized by the pumping optical sources(212). © KIPO 2003 ...

LASER CONTAINING A DISTRIBUTED GAIN MEDIUM

A laser device (10) which may be used as an oscillator or amplifier comprising a chamber (12) having a volume formed therein and a gain medium comprises solid-state elements (14) containing active laser ion distributed within the volume. A cooling fluid (16) flows about the solid-state elements and a semiconductor laser diode (18) provides optical pump radiation into the volume of the laser chamber (12) such that laser emission from the device passes through the gain medium (14) and the fluid (16). The laser device (10) provides the advantages of a solid-state gain medium laser (e.g., diode-pumping, high power density, etc.), but enables operation at higher average power and beam quality than would be achievable from a pure solid-state medium.

End pumped zig-zag slab laser gain medium

An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45 DEG angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with a amplified light. In order to confine the absorption of the pumped light to the center portion ...

Variable pulsewidth lasers

A variable pulsewidth laser system is disclosed which employs an oscillating reflector to control the duration of laser pulses. In one embodiment, the oscillating mirror is swept (e.g., caused to swing back and forth) about an axis distinct from the optical axis, such that resonant conditions suitable for laser beam generation occur only at a particular location in the oscillating sweep path. By varying the scanning waveform, laser pulses of different durations can be generated.

Rare earth-oxides, rare earth nitrides, rare earth phosphides and ternary alloys with silicon

Atomic layer epitaxy (ALE) is applied to the fabrication of new forms of rare-earth oxides, rare-earth nitrides and rare-earth phosphides. Further, ternary compounds composed of binary (rare-earth oxides, rare-earth nitrides and rare-earth phosphides) mixed with silicon and or germanium to form compound semiconductors of the formula RE-(O, N, P)-(Si,Ge) are also disclosed, where RE=at least one selection from group of rare-earth metals, O=oxygen, N=nitrogen, P=phosphorus, Si=silicon and Ge=germanium. The presented ALE growth technique and material system can be applied to silicon electronics, opto-electronic, magneto-electronics and magneto-optics devices.

Solid-state suspension laser with separate excitation and extraction

A laser. The novel laser includes a gain medium, a pump source adapted to optically excite the gain medium in a first location, and a resonator adapted to extract energy from the gain medium in a second location distinct from the first location. In an illustrative embodiment, the gain medium is comprised of a plurality of solid-state gain particles suspended in a fluid. The gain medium is adapted to flow, and optical excitation of the gain medium occurs outside of the resonator. In a preferred embodiment, the flow velocity and the density of gain particles in the gain medium are adjusted for optimal absorption efficiency during optical excitation and then for optimal extraction efficiency in the resonator. In addition, the resonator may be shaped for optimal extraction efficiency, while pump modules that hold the gain medium during optical excitation are shaped for optimal absorption efficiency.

Solid state laser with multiple cores coupled by fold optics

A laser rod assembly includes a first and second laser rod embedded in a cladding material. The assembly has a first end and a second end. The laser rods generate laser light at laser (laser light) when pumped by pump power at pump. A reflecting outer surface at pump is on or over a majority of an outer surface of the cladding material. Fold optic(s) on the second end provides optical coupling between the laser rods. An optical resonator includes a highly reflecting (HR) mirror at laser over an end of the first laser rod on the first end and an output coupler over an end of the second laser rod also on the first end.

Heavy metal modified silica glass fibers doped with thulium, holmium, and thulium-sensitized-holmium high quantum efficiencies

A modified silica glass composition for providing a reduction in the multiphonon quenching for a rare-earth dopant comprising:SiO2 in a host material;a rare-earth dopant;a first SiO2 modifier; anda second SiO2 modifier; such that said first modifier and said second modifier reduce multiphonon quenching of the rare-earth dopant contained therein.

Laser-diode-excited laser apparatus, fiber laser apparatus, and fiber laser amplifier in which laser medium doped with one of Ho3+, Sm3+, Eu3+, Dy3+, Er3+, and Tb3+ is excited with GaN-based compound laser diode

A solid-state laser crystal constituting a laser-diode-excited solid-state laser apparatus or an optical fiber constituting a fiber laser apparatus or fiber laser amplifier is doped with one of Ho3+, Sm3+, Eu3+, Dy3+, Er3+, and Tb3+ so that a laser beam is emitted from the solid-state laser crystal or the optical fiber, or incident light of the fiber laser amplifier is amplified, by one of the transitions from 5S2 to 5I7, from 5S2 to 5I8, from 4G5/2 to 6H5/2, from 4G5/2 to 6H7/2, from 4F3/2 to 6H11/2, from 5D0 to 7F2, from 4F9/2 to 6H13/2, from 4F9/2 to 6H11/2, from 4S3/2 to 4I15/2, from 2H9/2 to 4I13/2, and from 5D4 to 7F5. The above solid-state laser crystal or optical fiber is excited with a GaN-based compound laser diode.

Amplifying Optical Electromagnetic Wave Concentrator

An amplifying optical electromagnetic wave concentrator includes an amplification focusing device and a receiver. The amplification focusing device focuses an incident optical electromagnetic wave on the receiver. The amplification focusing device is doped with active components and is subjected to an excitation wave that causes the active components to pass to an energy level such that interaction between the incident electromagnetic wave and the active components causes the active components to pass to a lower energy level and causes emission, towards the receiver, of at least one photon having the same wavelength as the incident electromagnetic wave. The focused photon or photons form an amplified wave of the incident electromagnetic wave.

SEMICONDUCTOR LASER DEVICE FOR ELECTRO-OPTIC APPLICATIONS AND METHOD FOR MANUFACTURING SAID DEVICE

Multiwavelength upconversion waveguide laser

A multiwavelength upconversion waveguide laser producing visible or ultraviolet wavelength radiation comprising a semiconductor laser diode (6) producing relatively long wavelength radiation, a channel waveguide (4) having a thin film material which converts the relatively long wavelength radiation into visible or ultraviolet wavelength radiation, and a optical resonator which recirculates the visible or ultraviolet wavelength radiation. The optical resonator may use an output optical coating (10) or one or more Bragg grating reflectors (12) as an output coupler. One or more optical resonators may be used to produce one or more visible or ultraviolet radiation wavelengths. One or more independently controllable lightwave modulators (24) are used to modulate the visible or ultraviolet wavelength radiation. ...

Rare earth-doped, stabilized cadmium halide glasses

СХЕМА ЛАЗЕРНОГО УСИЛИТЕЛЯ С ПОПЕРЕЧНОЙ НАКАЧКОЙ

... 1. Схема оптического усиления, содержащая:источник накачки, выполненный с возможностью генерации света на длине волны накачки вдоль оптического тракта;апертуру накачки, выполненную с возможностью приема света на длине волны накачки;область усиления, размещенную вдоль оптического тракта и включающую в себя элемент усиления, выполненный с возможностью усиления света на длине волны лазера, при этом область усиления характеризуется первой стороной, пересекающей оптический тракт, второй стороной, находящейся напротив первой стороны, третьей стороной, смежной первой и второй сторонам, и четвертой стороной, находящейся напротив третьей стороны;дихроичную секцию, размещенную между апертурой накачки и первой стороной области усиления, при этом дихроичная секция характеризуется низкой отражательной способностью на длине волны накачки и высокой отражательной способностью на длине волны лазера;первую секцию с оболочкой поблизости с третьей стороной области усиления; ивторую секцию с оболочкой поблизости ...

Halbleiterlaser bestehend aus mit seltenen Erden dotiertem Diamant

Mit seltenen Erden dotierte, stabilisierte Cadmiumhalidgläser

OPTISCHER, ELEKTROMAGNETISCHE WELLEN VERSTÄRKENDER KONZENTRATOR

Amplifying optical device pumped or seeded with nonlinearly generated light

Solid state laser with multiple cores coupled by fold optics

A laser rod assembly (250) includes a first and second laser rod (135a, 135b) embedded in a cladding material (136). The assembly has a first end (211) and a second end (212). The laser rods generate laser light l laser (l laser light) when pumped by pump power at l pump . A reflecting outer surface at גpump is on or over a majority of an outer surface of the cladding material. Fold optic(s) on the second end provides optical coupling between the laser rods. An optical resonator includes a highly reflecting (HR) mirror (216) at גlaser over an end of the first laser rod on the first end and an output coupler (217) over an end of the second laser rod also on the first end.

Apparatus and method for adjusting the wavelength of light

Compact optical fiber amplifier module

END PUMPED ZIG-ZAG SLAB LASER GAIN MEDIUM

An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45.degree. angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with a amplified light. In order to confine the absorption of the pumped light to the center portion ...

ARRAY-TYPE LIGHT SOURCE LIGHT-SPLITTING DEVICE, AND LIGHT-SPLITTING METHOD THEREOF

An array light source light splitting device and a light splitting method thereof. The light splitting device comprises: a seed source (10) for inputting signal light; an optical fiber amplifier (20) connected to the seed source (10); and an optical splitter connected to the optical fiber amplifier (20). The optical splitter (30) is provided with N optical fibers, N being a natural number; the optical splitter (30) splits signal light from the seed source (10) into N beams and outputs same. Signal light from the seed source (10) passes through the optical fiber amplifier (20) to have the power amplified, and then passes through the optical splitter (30) to be changed into multiple beams of signal light to be output. The repetition frequency of 1550 nm laser can reach megahertz, and the laser has a high water absorption coefficient. The waveband laser has a high damage threshold to the human eyes when being radiated to the human eyes, and therefore has an eye-safe characteristic. The light ...

SEMICONDUCTOR LASERS COMPRISING RARE EARTH METAL-DOPED DIAMOND

In general, the semiconductor laser device of the present invention comprises an emitting element comprising a doped diamond, which is doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal. The semiconductor laser device assembly according to the present invention comprises an emitting element of a doped diamond, which is a diamond doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal, and a thermal releasing element of a substantially undoped diamond, on which the semiconductor laser device are placed.

LASER DEVICE HAS JUST FREQUENCY CONVERTER IN A MONOLITHIC WAY.

RARE EARTH DOPED Lu2O3 POLYCRYSTALLINE CERAMIC LASER GAIN MEDIUM

A method for making a rare earth doped polycrystalline ceramic laser gain medium by hot pressing a rare earth doped polycrystalline powder where the doping concentration is greater than 2% and up to 10% and where the grain size of the final ceramic is greater than 2 μm. The polycrystalline powder can be LuO, YO, or ScO, and the rare earth dopant can be Yb, Er, Tm, or Ho. Also disclosed is the related rare earth doped polycrystalline ceramic laser gain medium prepared by this method. 1. A method for making a rare earth doped polycrystalline ceramic laser gain medium , comprising:hot pressing a rare earth doped polycrystalline powder;wherein the doping concentration is greater than 2%; andwherein the grain size of the final ceramic is greater than 2 μm.2. The method of claim 1 , wherein the polycrystalline powder comprises LuO claim 1 , YO claim 1 , ScO claim 1 , or any combination thereof.3. The method of claim 1 , wherein the rare earth dopant comprises Yb claim 1 , Er claim 1 , Tm claim 1 , Ho claim 1 , or any combination thereof.4. The method of claim 1 , wherein the doping concentration is 10%.5. The method of claim 1 , wherein a sintering aid is used in the hot pressing.6. The method of claim 5 , wherein the sintering aid is lithium fluoride.7. The method of claim 1 , wherein the resulting laser gain medium has an efficiency of up to 74%.8. The method of claim 1 , wherein the resulting laser gain medium has an output power of 16 W or greater.9. A rare earth doped polycrystalline ceramic laser gain medium made by the method claim 1 , comprising:hot pressing a rare earth doped polycrystalline powder;wherein the doping concentration is greater than 2%; andwherein the grain size of the final ceramic is greater than 2 μm.10. The rare earth doped polycrystalline ceramic laser gain medium of claim 9 , wherein the polycrystalline powder comprises LuO claim 9 , YO claim 9 , ScO claim 9 , or any combination thereof.11. The rare earth doped polycrystalline ceramic laser ...

DEVICE FOR MEASURING CONCENTRATION OF SUBSTANCE IN BLOOD, AND METHOD FOR MEASURING CONCENTRATION OF SUBSTANCE IN BLOOD

The concentration of substance in blood is measured non-invasively, with high accuracy and with simple configuration. Laser light generated by a light source is locally irradiated on the body epithelium F of a subject, and the resulting diffused reflected light is detected by a light detector The laser light has a wavelength of 9.26 μm. The laser light is generated by converting and amplifying pulsed excitation light from an excitation light source to a long wavelength. A plate-shaped window that is transparent to mid-infrared light is brought in close contact with the body epithelium F. The glucose concentration in interstitial fluid can be calculated using normalized light intensity calculated from a signal ratio of signals from a monitoring light detector and light detector 1. A device for measuring the concentration of substance in blood that measures the concentration of substance that is included in the blood of a body , comprising:a laser oscillator that oscillates a first laser light having a wavelength that is within the range 2.5 μm to 12 μm, and that is absorbed by the substance;a light-guiding unit that guides the first laser light to the body, and guides first diffused reflected light that is generated by the first laser light from the body; anda light-detection unit that detects the light intensity of the first diffused reflected light.2. The device for measuring the concentration of substance in blood according to claim 1 , whereinthe light-guiding unit comprises:an incident-side optical waveguide that guides the first laser light to the body; andan exit-side optical waveguide that guides the first diffused reflected light to the light-detection unit.3. The device for measuring the concentration of substance in blood according to claim 2 , whereinthe light-guiding unit guides the first laser light to the body at an incident angle of 35° to 85°.4. The device for measuring the concentration of substance in blood according to claim 2 , whereinthe laser ...

Amplifying apparatus and amplifying medium

An amplifying apparatus includes an optical fiber that includes a wound portion doped with a rare earth element and three-dimensionally wound, holes being formed in cladding of the optical fiber and surrounding a core of the optical fiber, the optical fiber transmitting signal light injected thereinto; a thermally conductive member in which the wound portion of the optical fiber embedded, the thermally conductive member having thermal conductivity; a light source that emits excitation light; an injecting unit that injects the excitation light emitted by the light source, into the optical fiber; and a temperature adjusting unit that includes a thermal coupling unit thermally connected to the light source and the thermally conductive member, the temperature adjusting unit adjusting a temperature of the thermal coupling unit.

LASER BEAM AMPLIFICATION DEVICE

A laser medium unit in a laser beam amplification device includes a plurality of laser media . A cooling medium flow path F is provided around the laser medium unit to cool the laser medium unit from outside. A sealed space between the laser media is filled with gas or liquid, and a laser beam for passing through the sealed space is not interfered by a cooling medium flowing outside. Therefore, a fluctuation of an amplified laser beam is prevented, and a quality such as stability and focusing characteristics of the laser beam is improved. 1: A laser beam amplification device comprising:a laser medium unit;an excitation light source configured to cause excitation light to enter the laser medium unit; anda cooling medium flow path configured to be arranged around the laser medium unit,wherein the laser beam amplification device amplifies and outputs a laser beam input to the laser medium unit;wherein the laser medium unit comprises:a plate-like first laser medium,a plate-like second laser medium, anda sealing material arranged between the first and the second laser media;wherein the first and the second laser media are aligned along a thickness direction of the first and the second laser media; andwherein a space between the first and the second laser media is a sealed space and is under a reduced pressure environment or is filled with gas.2: The laser beam amplification device according to claim 1 , whereinmaterials of the first and the second laser media are ceramic laser media.3: The laser beam amplification device according to claim 1 , whereinthe laser medium unit includes a pair of flanges arranged opposed to each other andthree or more support columns for connecting the flanges and capable of adjusting a distance between the flanges,an alignment direction of the first and the second laser media coincides with a longitudinal direction of the support column, anda pressure to be applied to the sealing material is adjustable by adjusting the distance between the ...

Optical fiber for a fiber laser, fiber laser, and production method for optical fiber for a fiber laser

An optical fiber for a fiber laser includes a core to which a rare-earth element is added, a first cladding formed around the core; and a second cladding formed around the first cladding, and excitation light is guided from at least one end of the first cladding to excite the rare-earth element to output a laser oscillation light. An addition concentration of the rare-earth element to the core is different in a longitudinal direction of the optical fiber for a fiber laser, and a core diameter and a numerical aperture of the optical fiber for a fiber laser are constant in the longitudinal direction of the optical fiber for a fiber laser.

LASER WITH A GAIN MEDIUM LAYER DOPED WITH A RARE EARTH METAL WITH UPPER AND LOWER LIGHT-CONFINING FEATURES

One illustrative laser disclosed herein includes a gain medium layer having a first width in a transverse direction that is orthogonal to a laser emitting direction of the laser, and an upper light-confining structure positioned above an upper surface of the gain medium layer, wherein the upper light-confining structure has a second width in the transverse direction that is equal to or less than the first width and comprises at least one material having an index of refraction that is at least 2.0. The laser also includes a lower light-confining structure positioned below a lower surface of the gain medium layer, wherein the lower light-confining structure has a third width in the transverse direction that is equal to or less than the first width and comprises at least one material having an index of refraction that is at least 2.0. 1. A laser having a laser emitting direction and a transverse direction that is orthogonal to the laser emitting direction , the laser comprising:a gain medium layer having an upper surface, a lower surface and a first width in the transverse direction;an upper light-confining structure positioned above the upper surface of the gain medium layer, the upper light-confining structure having a second width in the transverse direction that is equal to or less than the first width, wherein the upper light-confining structure comprises at least one material having an index of refraction that is at least 2.0; anda lower light-confining structure positioned below the lower surface of the gain medium layer, the lower light-confining structure having a third width in the transverse direction that is equal to or less than the first width, wherein the lower light-confining structure comprises at least one material having an index of refraction that is at least 2.0.2. The laser of claim 1 , wherein the second width is substantially equal to the third width.3. The laser of claim 1 , wherein a lower surface of the upper light-confining structure is ...

HIGH POWER SUPERCONTINUUM FIBER OPTICAL SOURCE WITH MIDSTAGE SPECTRUM BROADENING

Embodiments relate to a high power supercontinuum (SC) fiber optical source. The SC fiber optical source includes a prebroadening optical fiber that broadens the spectrum of a lower power intermediate optical signal before final amplification. The spectrum broadening creates spectral components which facilitate further spectrum broadening of amplified signal in final nonlinear stage, allowing to achieve flatter and wider spectrum, and reduces nonlinear Stimulated Brillouin Scattering (SBS) that could damage SC fiber optical source components or limit the output power of the SC fiber optical source signal, thus enabling higher output power. After amplification in booster, passing at least part of broadened spectrum, the optical signal spectrum is further broadened by injecting the optical signal into a nonlinear stage to create a SC optical signal. 1. An optical source comprising:a fiber amplifier that receives a seed optical signal having a wavelength spectrum comprising a spectral line, the fiber amplifier amplifying a power of the seed optical signal to produce an input optical signal, a wavelength spectrum of the input optical signal comprising a spectral line with an increased amplitude compared to the spectral line of the seed optical signal;a prebroadening fiber that is optically coupled to the fiber amplifier and receives the input optical signal, the prebroadening fiber broadening the wavelength spectrum of the input optical signal to produce a prebroadened optical signal, a wavelength spectrum of the prebroadened optical signal comprising a spectral line of reduced amplitude compared to the spectral line of the input optical signal and a spectral background caused by broadening of the spectral line of the input optical signal; anda boost amplifier optically coupled to the prebroadening fiber, the boost amplifier amplifying a power of the prebroadened optical signal to produce an amplified optical signal.2. The optical source of claim 1 , wherein the boost ...

OPTICAL DEVICE

An object is to provide an optical device capable of relaxing a manufacturing condition for an optical waveguide used in the optical device. An optical device is provided with an optical waveguide including a core and a cladding optically joined together, and a temperature controller that controls temperature of the optical waveguide, wherein the optical waveguide includes the core and the cladding formed such that a normalized frequency specified for light propagating through the optical waveguide changes across a cutoff frequency of a guided mode determined from a structure of the optical waveguide in a temperature range in which a refractive index of the core is higher than a refractive index of the clad. The temperature controller controls the temperature of the optical waveguide over a temperature range across temperature at which the normalized frequency equals to the cutoff frequency. 1. An optical device comprising: an optical waveguide including a core and a cladding which are optically joined together; and a temperature controller to control temperature of the optical waveguide ,the optical waveguide including the core and the cladding formed in which a normalized frequency specified for light propagating through the optical waveguide changes across a cutoff frequency of a guided mode determined from a structure of the optical waveguide in a first temperature range in which a refractive index of the core is higher than a refractive index of the cladding, andthe temperature controller controlling the temperature of the optical waveguide over a second temperature range across a temperature at which the normalized frequency equals to the cutoff frequency.2. The optical device according to claim 1 , wherein the refractive indices of the core and the cladding have a relationship to decrease a difference between a square of the refractive index of the core and a square of the refractive index of the cladding with an increase or a decrease in the temperature of ...

AMPLIFICATION OPTICAL FIBER AND OPTICAL FIBER AMPLIFIER

An amplification optical fiber operable to propagate light beams in a plurality of modes in a predetermined wavelength range through a core doped with a rare earth element, wherein Expression (1) is satisfied, where a cutoff wavelength of a propagated highest mode light beam is defined as λmax, under conditions in which the cutoff wavelength of the highest mode light beam is defined as λc, a shortest wavelength of the wavelength range is defined as λmin, and a cutoff wavelength of a second-highest mode light beam to the highest mode light beam is λmin. 1. An amplification optical fiber operable to propagate light beams in a plurality of modes in a predetermined wavelength range through a core doped with a rare earth element , , whereinExpression (1) is satisfied, {'br': None, 'i': 'c', 'λ>0.5 λmin+0.5 λmax\u2003\u2003(1)'}, 'where a cutoff wavelength of a propagated highest mode light beam is defined as λmax, under conditions in which the cutoff wavelength of the highest mode light beam is defined as λc, a shortest, wavelength of the wavelength range is defined as λmin, and a cutoff wavelength of a second-highest mode light beam to the highest, mode light beam is λmin.'}2. The amplification optical fiber according to claim 1 , wherein {'br': None, 'i': 'λc', '>0.25 λmin+0.7 λmax\u2003\u2003(2)'}, 'Expression (2) is satisfied.'}3. The amplification optical fiber according to claim 1 , whereinthe predetermined wavelength range is a range of 1,530 to 1,565 nm, inclusive.4. The amplification optical fiber according to claim 1 , wherein:the core has an inner core doped with no rare earth element and an outer core surrounding an outer circumferential surface of the inner core and doped with a rare earth element; anda relative refractive index difference between the inner core and a cladding is smaller than a relative refractive index difference between the outer core and the cladding.5. The amplification optical fiber according to claim 1 , wherein{'sub': 01', '11, 'the ...

HIGH EFFICIENCY AMPLIFICATION OF PULSED LASER OUTPUT FOR HIGH ENERGY ULTRAFAST LASER SYSTEMS

Systems and methods of high efficiency amplification of pulsed laser output for high energy ultra-short pulse laser systems are provided herein. According to some embodiments, methods for amplifying pulsed laser output for high energy ultra-short pulse laser systems include receiving pulsed laser output and amplifying the pulsed laser output by propagating the pulsed laser output through a non-silica based gain medium that has been doped with a concentration of rare earth ions, wherein the concentration of the rare earth ions within the gain medium is approximately greater than one percent by weight. 1. A method for amplifying laser pulses for ultra-short pulse laser output , the method comprising:receiving laser pulses for ultra-short pulse laser output; andamplifying the laser pulses for ultra-short pulse laser output by propagating the laser pulses through a non-silica based gain medium that has been doped with a concentration of a rare earth ions, wherein the concentration of the rare earth ions within the gain medium is approximately greater than one percent by weight.2. The method according to claim 1 , further comprising propagating the laser pulses through a high order mode passive medium before and during amplification.3. The method according to claim 1 , further comprising phase tailoring the laser pulses to reduce self-phase modulation of the pulsed laser output during propagation of the same through the gain medium.4. The method according to claim 3 , wherein phase tailoring includes at least one of active phase and amplitude shaping of the laser pulses for ultra-short pulse laser output.5. The method according to claim 1 , wherein the input to the high efficiency medium amplifier includes a multiplexed combination of a signal and one or more pumplaser beams.6. The method according to claim 5 , wherein the input to the high efficiency medium amplifier includes a pulsed signal laser output and a pump laser output that have wavelengths in tandem with one ...

Modelocked Laser Electric Field Sensor

An electro-optic (EO) sensor and a method for detecting a local electric field strength, the EO sensor including: a first optical cavity; a gain medium within the first optical cavity; a mode locking element within the first optical cavity; and an EO material within the first optical cavity, an effective optical path length of the EO material being variable depending on the local electric field strength at the EO sensor, wherein the gain medium, the mode locking element, and the EO material are arranged in a common path of light within the first optical cavity, and wherein during operation, the EO sensor emits pulses of light at a repetition rate characteristic of an effective optical path length of the light within the first optical cavity, the effective optical path length varying depending on the electric field strength local to the EO sensor. 1. An electro-optic (EO) sensor for detecting a local electric field strength , the EO sensor comprising:a first optical cavity;a gain medium within the first optical cavity;a mode locking element within the first optical cavity; andan EO material within the first optical cavity, an effective optical path length of the EO material being variable depending on the local electric field strength at the EO sensor,wherein the gain medium, the mode locking element, and the EO material are arranged in a common path of light within the first optical cavity, andwherein during operation, the EO sensor emits pulses of light at a repetition rate characteristic of an effective optical path length of the light within the first optical cavity, the effective optical path length varying depending on the electric field strength local to the EO sensor.2. The EO sensor of claim 1 , further comprising a second optical cavity different from the first optical cavity claim 1 , wherein the EO material is arranged within the second optical cavity claim 1 , and the second optical cavity is configured to resonantly enhance a change in the effective ...

COMPENSATED BROADBAND FIBER LIGHT SOURCE WITH STABLE MEAN WAVELENGTH

A fiber light source comprises a laser pump configured to generate a pump laser beam at a predetermined wavelength; a first segment of rare earth doped fiber; a second segment of rare earth doped fiber; and an optical coupler coupled to a first end of the first segment and a first end of the second segment. The optical coupler is configured to split the pump laser beam based on a power coupling ratio. The first segment generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that a combined stimulated emission is approximately insensitive to pump laser power fluctuations. 1. A fiber light source comprising:a pump laser configured to generate a pump laser beam at a predetermined wavelength;a first segment of rare earth doped fiber;a second segment of rare earth doped fiber; andan optical coupler coupled to a first end of the first segment and a first end of the second segment, the optical coupler configured to split the pump laser beam based on a power coupling ratio such that a first portion of the pump laser beam is coupled to the first segment at a first power level and a second portion of the pump laser beam is coupled to the second segment at a second power level;wherein the first segment of rare earth doped fiber generates a first stimulated emission having a first mean wavelength sensitivity to pump laser power fluctuations and the second segment of rare earth doped fiber generates a second stimulated emission having a second mean wavelength sensitivity to pump laser power fluctuations such that, when the first stimulated emission is combined with the second stimulated emission, a combined stimulated emission is approximately insensitive to pump laser power fluctuations.2. The fiber light source of claim 1 , wherein the first segment of rare earth doped fiber has ...

CMOS COMPATIBLE RARE-EARTH-DOPED WAVEGUIDE AMPLIFIER

The present application is directed to a waveguide amplifier. The waveguide amplifier has a substrate including an upper surface and a lower surface. The waveguide amplifier also has a core made of silicon or silicon nitride formed on an upper surface of the substrate. The core includes a channel configured to transmit light there through. The waveguide amplifier also includes an upper cladding layer formed above the core. The upper cladding layer includes a glass doped with rare earth material. The application is also directed to a method of amplifying a signal. 1. A waveguide amplifier comprising:a substrate including an upper surface and a lower surface;a core (Si or SiN) formed on an upper surface of the substrate, the core including a channel configured to transmit light there through; andan upper cladding layer formed above the core, the upper cladding layer including a glass doped with rare earth material.2. The waveguide amplifier of claim 1 , wherein the core is free of rare-earth material.3. The waveguide amplifier of claim 1 , wherein the upper cladding layer is selected from the rare earth material claim 1 , silica claim 1 , phosphorus claim 1 , geranium claim 1 , aluminum claim 1 , boron or combinations thereof.4. The waveguide amplifier of claim 1 , wherein the rare earth material is present in an amount less than 3%.5. The waveguide amplifier of claim 4 , wherein the rare earth material is present in an amount less than 1%.6. The waveguide amplifier of claim 1 , wherein the rare-earth doped material is selected from lanthanum claim 1 , cerium claim 1 , praseodymium claim 1 , neodymium claim 1 , promethium claim 1 , samarium claim 1 , europium claim 1 , gadolinium claim 1 , terbium claim 1 , dysprosium claim 1 , holmium claim 1 , erbium claim 1 , thulium claim 1 , ytterbium claim 1 , lutetium or combinations thereof.7. The waveguide amplifier of claim 1 , wherein the core has a circular spiraling configuration entirely positioned on the upper surface ...

MULTIMODE FABRY-PEROT FIBER LASER

A multimode (“MM”) fiber oscillator is configured with MM active fiber doped with light emitters, a pair of MM passive fibers spliced to respective opposite ends of the MM active fiber, and a plurality of MM fiber Bragg gratings (“FBG”) written in respective cores of the MM passive fibers to provide a resonant cavity. The passive and active fibers are configured with respective cores which are dimensioned with respective diameters matching one another and substantially identical numerical apertures. 1. An CW or QCW multimode (“MM”) Fabri-Perot all fiber oscillator comprising:a MM active fiber provided with a monolithic core which is doped with light emitters;two MM passive fibers spliced to respective opposite ends of the MM active fiber; andMM fiber Bragg gratings (“FBG”) written in respective cores of the MM passive fibers and defining a resonant cavity therebetween, wherein the laser is configured to output light emitted at a desired wavelength and having a narrow linewidth which varies between 0.02 and 10 nm.2. The MM fiber oscillator of claim 1 , wherein the MM active and passive fibers are configured with respective monolithic cores claim 1 , the cores having respective opposing ends dimensioned with respective diameters which substantially match one another.3. The MM fiber oscillator of claim 2 , wherein the core of the MM active fiber has a cylindrical cross-section with a uniform diameter between opposite ends thereof or double-bottleneck-shaped cross section.4. The MM fiber oscillator of claim 1 , wherein the MM active and passive fibers are configured with respective numerical apertures substantially matching one another.5. The MM fiber oscillator of further comprising a pump operative to side-pump the MM active fiber claim 1 , the pump including one or a plurality of MM laser diodes.6. The MM fiber oscillator of claim 1 , wherein the light emitters include ions of rare earth elements which are selected from the group consisting of ytterbium (“Yb”) claim ...

Fiber Encapsulation Mechanism for Energy Dissipation in a Fiber Amplifying System

The present disclosure relates to a fiber encapsulation mechanism for energy dissipation in a fiber amplifying system. One example embodiment includes an optical fiber amplifier. The optical fiber amplifier includes an optical fiber that includes a gain medium, as well as a polymer layer that at least partially surrounds the optical fiber. The polymer layer is optically transparent. In addition, the optical fiber amplifier includes a pump source. Optical pumping by the pump source amplifies optical signals in the optical fiber and generates excess heat and excess photons. The optical fiber amplifier additionally includes a heatsink layer disposed adjacent to the polymer layer. The heatsink layer conducts the excess heat away from the optical fiber. Further, the optical fiber amplifier includes an optically transparent layer disposed adjacent to the polymer layer. The optically transparent layer transmits the excess photons away from the optical fiber. 1. An optical fiber amplifier , comprising:an optical fiber comprising a gain medium;a polymer layer that at least partially surrounds the optical fiber, wherein the polymer layer is optically transparent;a pump source configured to optically pump the optical fiber, wherein optical pumping by the pump source amplifies optical signals in a wavelength range transmitted through the gain medium of the optical fiber and generates excess heat and excess photons;a heatsink layer disposed adjacent to the polymer layer, wherein the heatsink layer conducts the excess heat away from the optical fiber; andan optically transparent layer disposed adjacent to the polymer layer opposite the heatsink layer, wherein the optically transparent layer transmits the excess photons away from the optical fiber.2. The optical fiber amplifier of claim 1 , wherein the optical fiber comprises a core that includes the gain medium and a cladding layer that surrounds the core.3. The optical fiber amplifier of claim 2 , wherein at least a portion of ...

NANOPARTICLE DOPING FOR LASERS AND AMPLIFIERS OPERATING AT EYE-SAFER WAVELENGTHS, AND/OR EXHIBITING REDUCED STIMULATED BRILLOUIN SCATTERING

Methods for synthesizing fibers having nanoparticles therein are provided, as well as preforms and fibers incorporating nanoparticles. The nanoparticles may include one or more rare earth ions selected based on fluorescence at eye-safer wavelengths, surrounded by a low-phonon energy host. Nanoparticles that are not doped with rare earth ions may also be included as a co-dopant to help increase solubility of nanoparticles doped with rare earth ions in the silica matrix. The nanoparticles may be incorporated into a preform, which is then drawn to form fiber. The fibers may beneficially be incorporated into lasers and amplifiers that operate at eye safer wavelengths. Lasers and amplifiers incorporating the fibers may also beneficially exhibit reduced Stimulated Brillouin Scattering. 1. Fiber gain media , comprising:a silica cladding; and nanoparticles comprising a material having a lower phonon energy than the silica;', 'rare-earth ions,, 'a silica core comprisingwherein the fiber gain media emits wavelengths longer than approximately 1.4 μm.2. The fiber gain media of claim 1 , further comprising co-dopant nanoparticles.3. The fiber gain media of claim 1 , wherein the rare-earth ions are selected from the group consisting of Er claim 1 , Ho claim 1 , Tm claim 1 , Pr claim 1 , Dy claim 1 , and combinations thereof.4. The fiber gain media of claim 1 , wherein the nanoparticle material is selected from the group consisting of AlO claim 1 , LaF claim 1 , LuO claim 1 , GaO claim 1 , InO claim 1 , and combinations thereof.5. The fiber gain media of claim 1 , wherein the one or more rare-earth ions are embedded in the nanoparticles.6. The fiber gain media of claim 2 , wherein the co-dopant nanoparticles are selected from the group consisting of AlO claim 2 , BiO claim 2 , PO claim 2 , GaO claim 2 , and combinations thereof.7. The fiber gain media of claim 1 , wherein the nanoparticles range in size from about 5 to about 100 nm.8. The fiber gain media of claim 2 , wherein the ...

OPTICAL COMMUNICATION APPARATUS AND CONTROL METHOD OF OPTICAL COMMUNICATION APPARATUS

Provided are an optical amplifier, a light reception element, and a controller configured to decrease a gain of the optical amplifier according to an optical signal power input to the optical amplifier in response to a detection of a recovery of the optical signal input to the optical amplifier from an interruption of the optical signal and to increase the gain of the optical amplifier so that an input optical power to the light reception element approaches a target value after the decreasing of the gain. 1. An optical communication apparatus comprising:an optical amplifier configured to amplify a received optical signal;a light reception element configured to receive the optical signal amplified by the optical amplifier; anda controller configured todecrease a gain of the optical amplifier according to an optical signal power input to the optical amplifier in response to a detection of a recovery of the optical signal input to the optical amplifier from an interruption of the optical signal, andincrease the gain of the optical amplifier so that an input optical power to the light reception element approaches a target value after the decreasing of the gain.2. The optical communication apparatus according to claim 1 , further comprising:a detector configured to detect the input optical signal power,wherein the controller includesa gain subtraction circuit configured to decrease the gain of the optical amplifier according to the input optical signal power when the input optical signal power detected by the detector reaches a first level, anda gain addition circuit configured to increase the gain of the optical amplifier when the input optical signal power reaches a second level larger than the first level.3. The optical communication apparatus according to claim 2 , whereinthe gain addition circuit stops increasing the gain when the gain approaches a gain at which the input optical signal power corresponds to a power at a third level larger than the second level.4. ...

PASSIVE Q-SWITCH LASER AND METHOD FOR OPTIMIZING ACTION OF THE SAME

A passive Q-switch laser has an excitation source for outputting excitation light; a laser medium between a pair of reflective mirrors that constitute part of an optical resonator, the laser medium emitting laser light upon being excited by the excitation light from the excitation source: a saturable absorber disposed between the pair of reflective mirrors, the saturable absorber being configured such that the transmittance thereof increases as the laser light beam the laser medium is absorbed, a matrix table in which the excitation-source output and the optimal value of the pulse width are stored in association with the repetition frequency; and a control unit for referring to the matrix table, reading out the excitation-source output and the optimal value of the pulse width that correspond to an inputted repetition frequency, and controlling the excitation source such that the read-out excitation-source output and optimal value of the pulse width are attained. 1. A passive Q-switch laser , comprising:an excitation source that is excited at a repetition frequency and outputs an excitation light;a laser medium that is in-place between a pair of reflection mirrors consisting of an optic resonator that emits a laser beam excited by the excitation light from the excitation source;a saturable absorber that is in-place between said pair of the mirrors increases a transmittance in accordance with an absorption of the laser beam from said laser medium;a matrix table that stores an output of said excitation source relative to said repetition frequency in coordination with an optimal value of a pulse width; anda control element that reads out the optimal value of the output of said excitation source and the optimal value of the pulse width, respectively corresponding to the input repetition frequency, referring to said matrix table and controls said excitation source to provide the respective values that are the same as the optimal value of the read-out output of said ...

Diffuse reflectors and methods of use thereof

In some embodiments, the present invention provides for a laser pump chamber, including: at least one laser gain medium, at least one excitation source, and at least one diffuse reflector to direct and redirect an emission from the excitation source into the laser gain medium, wherein the at least one diffuse reflector is made from a diffuse reflector material comprising at least one of: 1) white quartz and 2) BaSO4.

PARAMETRIC COMB GENERATION VIA NONLINEAR WAVE MIXING IN HIGH-Q OPTICAL RESONATOR COUPLED TO BUILT-IN LASER RESONATOR

The disclosed technology, in one aspect, includes an optical comb generator device which includes a laser cavity that includes an optical gain material to provide an optical gain and an optical path to allow laser light to circulate inside the laser cavity; and a high-Q resonator optically coupled in the optical path inside the laser cavity so that the laser light generated and sustained inside the laser cavity is in optical resonance with the high-Q resonator to cause laser light stored inside the high-Q resonator to have an optical intensity above a four wave mixing threshold of the high-Q resonator to cause parametric four wave mixing so as to pro duce an optical comb of different optical frequencies. 1. An optical comb generator device , comprising:a laser cavity that includes an optical gain material to provide an optical gain and an optical path to allow laser light to circulate inside the laser cavity; anda high-Q resonator optically coupled in the optical path inside the laser cavity so that the laser light generated and sustained inside the laser cavity is in optical resonance with the high-Q resonator to cause laser light stored inside the high-Q resonator to have an optical intensity above a four wave mixing threshold of the high-Q resonator to cause parametric four wave mixing so as to produce an optical comb of different optical frequencies.2. The device as in claim 1 , wherein:the laser cavity includes a fiber amplifier as the optical gain material, a fiber path for guiding laser light inside the laser cavity.3. The device as in claim 2 , wherein the fiber amplifier includes an erbium-doped fiber amplifier (EDFA) claim 2 , a Ytterbium-doped fiber amplifier claim 2 , a Thulium-doped fiber amplifier or a semiconductor optical amplifier.4. The device as in claim 2 , comprising:a polarization controller inside the laser cavity to control an optical polarization of the laser light inside the laser cavity.5. The device as in claim 4 , wherein the ...

Solid-state optical amplifier having an active core and doped cladding in a single chip

A solid-state optical amplifier is described, having an active core and doped cladding in a single chip. An active optical core runs through a doped cladding in a structure formed on a substrate. A light emitting structure, such as an LED, is formed within and/or adjacent to the optical core. The cladding is doped, for example, with erbium or other rare-earth elements or metals. Several exemplary devices and methods of their formation are given.

OPTICAL FIBER FOR A FIBER LASER, FIBER LASER, AND PRODUCTION METHOD FOR OPTICAL FIBER FOR A FIBER LASER

An optical fiber for a fiber laser includes a core to which a rare-earth element is added, a first cladding formed around the core; and a second cladding formed around the first cladding, and excitation light is guided from at least one end of the first cladding to excite the rare-earth element to output a laser oscillation light. An addition concentration of the rare-earth element to the core is different in a longitudinal direction of the optical fiber for a fiber laser, and a core diameter and a numerical aperture of the optical fiber for a fiber laser are constant in the longitudinal direction of the optical fiber for a fiber laser. 1. An optical fiber for a fiber laser including a core to which a rare-earth element is added , a first cladding formed around the core , and a second cladding formed around the first cladding , in which excitation light is guided from at least one end of the first cladding to excite the rare-earth element to output a laser oscillation light , whereinan addition concentration of the rare-earth element to the core is different in a longitudinal direction of the optical fiber for a fiber laser, anda core diameter and a numerical aperture of the optical fiber for a fiber laser are constant in the longitudinal direction of the optical fiber for a fiber laser.2. The optical fiber for a fiber laser according to claim 1 , whereinthe addition concentration of the rare-earth element to the core in a region closer to the end that guides the excitation light in the longitudinal direction of the optical fiber for a fiber laser is lower than that in the other region.3. The optical fiber for a fiber laser according to claim 1 , whereina refractive index adjustment element that changes a refractive index of the core is added to the core so as to cancel change in the refractive index of the core resulting from change in the addition concentration of the rare-earth element to the core and maintain the refractive index of the core to be constant in ...

PUMP COMBINER FOR MULTI-CLAD FIBERS

Disclosed herein is a fiber pump combiner, comprising, a multi-clad fiber comprising an outer cladding layer and an inner cladding layer, a plurality of tapered trenches formed in the inner cladding layer and a plurality of pump fibers, wherein the plurality of pump fibers are tapered and fused into corresponding ones of the plurality of tapered trenches. 1. A fiber amplifier laser , comprising:a first plurality of laser diode modules coupled to a first end of a multi-clad fiber;a first plurality of tapered pump fibers coupling the first plurality of laser diode modules to the second end of the multi-clad fiber via a first pump combiner,wherein the first pump combiner comprises first tapered trenches formed in the multi-clad fiber and wherein the first tapered pump fibers are fused into respective ones of the first tapered trenches; anda master oscillator power amplifier coupled to the multi-clad fiber to amplify a signal generated by the counter-pumped fiber amplifier laser.2. The fiber amplifier laser of claim 1 , further comprising:a second plurality of laser diode modules coupled to a second end of the multi-clad fiber; anda second plurality of tapered pump fibers coupling the second plurality of laser diode modules to the second end of the multi-clad fiber via a second pump combiner, wherein the second pump combiner comprises second tapered trenches formed in the signal fiber multi-clad fiber and wherein the second tapered pump fibers are fused into respective ones of the second tapered trenches.3. The fiber amplifier laser of claim 1 , wherein the multi-clad fiber is a glass-clad fiber.4. The fiber amplifier laser of claim 1 , wherein the multi-clad fiber is a polymer-clad fiber.5. A fiber amplifier laser claim 1 , comprising:a first plurality of laser diode modules coupled to a first end of a multi-clad fiber;a first plurality of tapered pump fibers coupling the first plurality of laser diode modules to the second end of the multi-clad fiber via a first pump ...

MICROSTRUCTURED OPTICAL FIBER, SUPERCONTINUUM LIGHT SOURCE COMPRISING MICROSTRUCTURED OPTICAL FIBER AND USE OF SUCH LIGHT SOURCE

The invention relates to a microstructured optical fiber for generating supercontinuum light. The optical fiber comprises a core and a cladding region surrounding the core. The optical fiber comprises a first fiber length section, a second fiber length section as well as an intermediate fiber length section between said first and second fiber length sections. The first fiber length section has a core with a first characteristic core diameter larger than about 7 μm. The second fiber length section has a core with a second characteristic core diameter, smaller than said first characteristic core diameter. The intermediate length section of the optical fiber comprises a core which is tapered from said first characteristic core diameter to said second characteristic core diameter over a tapered length. The invention also relates to a supercontinuum light source comprising an optical fiber according to the invention and a pump light source. 143-. (canceled)44. A microstructured optical fiber for generating supercontinuum light upon feeding of light having a first wavelength λ , the optical fiber having a length and a longitudinal axis along its length and comprising a core region for guiding light along the length of said optical fiber , and a first cladding region surrounding said core region , wherein:said optical fiber, along its length, comprises a first fiber length section, a second fiber length section as well as an intermediate fiber length section between said first and second fiber length sections,{'sub': '1', 'said first fiber length section has a core region with a first characteristic core diameter Win a cross-section through the microstructured optical fiber perpendicularly to the longitudinal axis, wherein said first characteristic core diameter is larger than about 7 μm,'}{'sub': 2', '2', '1, 'said second fiber length section has a core region with a second characteristic core diameter Win a cross-section through the microstructured optical fiber ...

ULTRAFAST PULSE LASER SYSTEM WITH MULTIPLE PULSE DURATION FAST SWITCH

A CPA ultrashort pulse laser system is configured with a beam splitter dividing each ultrashort pulse from a seed laser into at least two replicas which propagate along respective replica paths. Each replica path includes an upstream dispersive element stretching respective replicas to different pulse durations. The optical switches are located in respective replica paths upstream or downstream from upstream dispersive elements. Each optical switch is individually controllable to operate at a high switching speed between “on” and “off” positions so as to selectively block one of the replicas or temporally separate the replicas at the output of the switching assembly. The replicas are so stretched that a train of high peak power ultrashort pulses each are output with a pulse duration selected from a fs ns range and peak power of up to a MW level. 1. A chirp pulse amplification (CPA) laser system , comprising:spaced apart ultrafast seed laser, outputting a train of pulses, and a booster;at least one beam splitter coupled to an output of the seed laser and configured to split each pulse incident thereupon into two replicas, the replicas propagating along respective replica paths while being chirped to a duration greater than that of the pulse; andtwo pulse switches located along respective replica paths and each controllable to alternate between an “on” position in which the replica unimpededly propagates towards the booster, and an “off” position in which a propagation of the replica is blocked.2. The CPA laser system of further comprising two upstream dispersive elements located along respective replica paths upstream or downstream from respective pulse switches claim 1 , the dispersive elements being configured to provide respective two replicas with a uniform or different chirp.3. The CPA laser system of claim 1 , wherein the replicas paths have respective optical path lengths which are equal to or different from one another.4. The CPA of claim 1 , wherein the ...

OPTICAL MODE FILTER EMPLOYING RADIALLY ASYMMETRIC FIBER

Fiber amplifier and/or mode filter including a linearly birefringent LMA fiber coiled at a radius of curvature over a bend length to differentiate a fundamental optical mode from supported higher-order modes through bending losses. The LMA fiber may be a polarization-maintaining (PM) fiber having a variety of geometrical core shapes and cladding configurations. In some embodiments, the birefringent LMA fiber includes a radially asymmetric core that is angularly rotated over a length of the coiled fiber to ensure bending losses are experienced in orthogonally oriented higher-order modes associated with some orientation relative to the core orientation. In some embodiments, the fiber coiling is two-dimensional with bending occurring only about one axis. In some embodiments, an asymmetric core is pre-spun to a predetermined axial spin profile. In some embodiments, angular rotation of the core is achieved through mechanically twisting an un-spun fiber over a length of the coil. 1. A fiber amplifier , comprising:a light source to produce an optical beam; and the LMA fiber has a radially asymmetric core; and', 'the asymmetric core has an angular rotation about a fiber axis over a bend length having a radius of curvature about an axis of curvature, non-parallel to the fiber axis, to attenuate the higher-order modes more than the fundamental mode through bend losses., 'a linearly birefringent large mode area (LMA) fiber coupled to the light source to support a fundamental mode and higher-order modes of the optical beam, wherein2. The fiber amplifier of claim 1 , wherein:the axis of curvature is orthogonal to the fiber axis over the bend length; andthe angular rotation over the bend length has a predetermined spin profile providing a suppression of at least 10 dB/meter of bend length for all higher-order modes.3. The fiber amplifier of claim 2 , wherein the LMA fiber is coiled about the axis of curvature with a fixed radius of curvature over the bend length and a rate of the ...

Polarization-Maintaining Fiber Device Supporting Propagation In Large Mode Field Diameters

A higher-order mode (HOM) fiber is configured as a polarization-maintaining fiber by including a pair of stress rods at a location within the cladding layer that provides for a sufficient degree of birefringence without unduly comprising the spatial mode profile of the propagating higher-order modes. Long-period gratings are used as mode couplers at the input and output of the PM-HOM fiber, where the gratings are formed by exposing areas of the core region orthogonal to the position of the stress rods. The diameter of the stress rods (D) and displacement of the rods from the center of the core region (R) are controlled to yield a configuration with an acceptable birefringence and polarization extinction ratio (PER) within the HOM fiber, even in situations where the fiber is bent (a bend radius less than 50 cm). 1. A polarization-maintaining optical fiber comprisingan inner core, having a first refractive index value and size;an outer core disposed to surround the inner core, the outer core having a second refractive index value different from the first refractive index value;{'sub': 'nm', 'a cladding layer disposed to surround the outer core, the cladding layer having a predetermined refractive index value, the combination of the inner core, outer core, and cladding layer configured such that the inner core and the outer core support the propagation of one or more defined lower-order modes (LOMs) and one or more defined higher-order LPmodes; and'}{'b': 1', '1, 'sub': 'nm', 'a pair of stress rods disposed substantially within the cladding layer on either side of the outer core and arranged along a common axis, defining a slow polarization axis, the pair of stress rods formed of a material having a coefficient of thermal expansion (CTE) different from the cladding layer CTE, where each stress rod exhibits a like diameter D and a like separation R between a center of the inner core and an inner edge of a stress rod, the values of D and R selected to provide a ...

MULTIMODE FIBER, OPTICAL AMPLIFIER, AND FIBER LASER

An object is to improve the efficiency of amplification by rare earth ion while maintaining beam quality of output light in a multi-mode fiber doped with rare earth ion. A multi-mode fiber () that includes a rare-earth-ion-doped core and that has a normalized frequency of not less than 2.40 includes a filter portion () that is formed by bending a partial section of or entirety of the multi-mode fiber (), the filter portion () having a smallest diameter (diameter R) that is set so that (1) only LP LP LP and LP modes propagate or only LP and LP modes propagate and (2) a loss of a highest-order one of the modes that propagate is not more than 0.1 dB/m. 1. A multi-mode fiber that comprises a rare-earth-ion-doped core and that has a normalized frequency of not less than 2.40 ,the multi-mode fiber comprising a filter portion that is formed by bending a partial section of or entirety of the multi-mode fiber,{'b': 01', '11', '21', '02', '01', '11, 'the filter portion having a smallest diameter that is set so that (1) only LP, LP, LP, and LP modes propagate or only LP and LP modes propagate and (2) a loss of a highest-order one of the modes that propagate is not more than 0.1 dB/m.'}2. The multi-mode fiber as set forth in claim 1 , wherein:the normalized frequency of the multi-mode fiber is not less than 3.83; and{'b': 01', '11', '21', '02', '02, 'the smallest diameter of the filter portion is set so that only the LP, LP, LP, and LP modes propagate and that a loss of the LP mode is not more than 0.1 dB/m.'}3011111. The multi-mode fiber as set forth in claim 1 , wherein the smallest diameter of the filter portion is set so that only the LP and LP modes propagate and that a loss of the LP mode is not more than 0.1 dB/m.4. The multi-mode fiber as set forth in claim 1 , wherein the filter portion is formed by winding at least a partial section of the multi-mode fiber into a loop form or a coil form.5. An optical amplifier comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1 ...

Compact hybrid laser rod and laser system

A hybrid fiber rod includes a fiber core and inner and outer cladding layers. The core is doped with an active element. The inner cladding layer surrounds the core, and has a refractive index substantially equal to that of the core. The outer cladding layer surrounds the inner cladding layer, and has a refractive index less than that of the core and inner cladding layer. The core length is about 30 to 2000 times the core diameter. A hybrid fiber rod laser system includes an oscillator laser, modulating device, the rod, and pump laser diode(s) energizing the rod from opposite ends. The rod acts as a waveguide for pump radiation but allows for free-space propagation of laser radiation. The rod may be used in a laser resonator. The core length is less than about twice the Rayleigh range. Degradation from single-mode to multi-mode beam propagation is thus avoided.

Methods and Systems for the Application and Use of High Power Laser Energy

There is provided a system, apparatus and methods for the laser drilling of a borehole in the earth. There is further provided with in the systems a means for delivering high power laser energy down a deep borehole, while maintaining the high power to advance such boreholes deep into the earth and at highly efficient advancement rates, a laser bottom hole assembly, and fluid directing techniques and assemblies for removing the displaced material from the borehole. 1. A high power laser drilling system for advancing a borehole comprising:a. a source of high power laser energy, the laser source capable of providing a laser beam having at least 5 kW of power;b. a tubing assembly, the tubing assembly having at least 1000 feet of tubing, having a distal end and a proximal;c. the proximal end of the tubing being in optical communication with the laser source, whereby the laser beam can be transported in association with the tubing;d. the tubing comprising a high power laser transmission cable, the transmission cable having a distal end and a proximal end, the proximal end being in optical communication with the laser source, whereby the laser beam is transmitted by the cable from the proximal end to the distal end of the cable for delivery of the laser beam energy to the borehole; and,e. the power of the laser energy at the distal end of the cable when the cable is within a borehole being at least about 2 kW.2. A high power laser drilling system for advancing a borehole comprising:a. a source of high power laser energy, the laser source capable of providing a laser beam having at least 5 kW of power;b. a tubing, the tubing assembly having at least 1000 feet of tubing, having a distal end and a proximal;c. a means for advancing the tubing into the borehole;d. a bottom hole assembly;e. a blowout preventer;f. a diverter;g. the proximal end of the tubing being in optical communication with the laser source, whereby the laser beam can be transported in association with the ...

PUMP COMBINER FOR MULTI-CLAD FIBERS

Disclosed herein is a fiber pump combiner, comprising, a multi-clad fiber comprising an outer cladding layer and an inner cladding layer, a plurality of tapered trenches formed in the inner cladding layer and a plurality of pump fibers, wherein the plurality of pump fibers are tapered and fused into corresponding ones of the plurality of tapered trenches. 1. A fiber pump combiner , comprising:a multi-clad fiber comprising an outer cladding layer and an inner cladding layer;a plurality of tapered trenches formed in the inner cladding layer; anda plurality of pump fibers, wherein the plurality of pump fibers are tapered and fused into corresponding ones of the plurality of tapered trenches.2. The fiber pump combiner of claim 1 , further comprising a core signal layer enclosed in the inner cladding.3. The fiber pump combiner of claim 1 , wherein the multi-clad fiber is an active fiber.4. The fiber pump combiner of claim 1 , wherein the multi-clad fiber is a passive fiber.5. The fiber pump combiner of claim 1 , wherein the outer cladding layer is stripped away from the inner cladding layer where the plurality of tapered trenches are formed.6. The fiber pump combiner of claim 1 , wherein the multi-clad fiber is glass-clad fiber.7. The fiber pump combiner of claim 1 , wherein the multi-clad fiber is a polymer clad triple clad fiber.8. The fiber pump combiner of claim 1 , wherein the outer cladding claim 1 , inner cladding layer or signal layer claim 1 , or any combinations thereof comprise silica claim 1 , fluorosilica claim 1 , Al-doped silica claim 1 , silica claim 1 , doped silica claim 1 , or the like or any combinations thereof.9. The fiber pump combiner of wherein the fiber is Yb-doped claim 1 , Tm-doped claim 1 , Er-doped claim 1 , or Ho-doped fiber or any combinations thereof.10. A method for forming a pump fiber combiner claim 1 , comprising:forming a trench in an inner cladding of a multi-clad fiber, wherein the trench is tapered;tapering the pump fiber to match ...

Multi-stage Optical Fiber Amplifier

The present disclosure relates to a fiber encapsulation mechanism for energy dissipation in a fiber amplifying system. One example embodiment includes an optical fiber amplifier. The optical fiber amplifier includes an optical fiber that includes a gain medium, as well as a polymer layer that at least partially surrounds the optical fiber. The polymer layer is optically transparent. In addition, the optical fiber amplifier includes a pump source. Optical pumping by the pump source amplifies optical signals in the optical fiber and generates excess heat and excess photons. The optical fiber amplifier additionally includes a heatsink layer disposed adjacent to the polymer layer. The heatsink layer conducts the excess heat away from the optical fiber. Further, the optical fiber amplifier includes an optically transparent layer disposed adjacent to the polymer layer. The optically transparent layer transmits the excess photons away from the optical fiber. 1. A multi-stage optical fiber amplifier , comprising: a single-clad optical fiber comprising a gain medium; and', 'a first pump diode arranged to optically pump the single-clad optical fiber, wherein optically pumping the single-clad optical fiber amplifies optical signals in a wavelength range transmitted through the gain medium of the single-clad optical fiber;, 'a first stage, comprising a dual-clad optical fiber comprising a gain medium, wherein the dual-clad optical fiber is optically coupled to the single-clad optical fiber at a fusion splice and arranged to receive optical signals from the single-clad optical fiber; and', 'a second pump diode arranged to optically pump the dual-clad optical fiber, wherein optically pumping the dual-clad optical fiber amplifies optical signals in the wavelength range transmitted through the gain medium of the dual-clad optical fiber; and, 'a second stage, comprisingan optically isolating section, wherein the optically isolating section is configured to prevent reverse ...

METHOD AND APPARATUS FOR ENSURING A UNIFORM TEMPERATURE PROFILE IN RIBBON FIBER LASERS AND AMPLIFIERS

A uniform temperature profile is provided across the width of the core of a ribbon fiber laser or amplifier by the use of insulating elements at the core edges and a spatially variable gain in the fiber core. High average power ribbon fibers, enable a variety of applications such as practical laser cutting and beam combining. 1. A ribbon fiber , comprising:a core including a rare earth dopant and having a length and further including an aspect ratio that is orthogonal to said length, wherein said aspect ratio comprises a long aspect that is orthogonal to a relatively shorter aspect, wherein the concentration of said rare earth dopant varies across said long aspect, wherein said long aspect spans a first edge of said core and a second edge of said core;means for guiding light within said core; andone or more heat insulating elements configured for flattening the thermal profile of said core.2. The ribbon fiber of claim 1 , wherein said one or more heat insulating elements are configured for flattening said thermal profile of said core along said long aspect while said light is guided within said core.3. The ribbon fiber of claim 1 , wherein said one or more heat insulating elements comprises at least a first heat insulating element or a second heat insulating element claim 1 , wherein said first heat insulating element is configured to reduce the amount of heat that can escape from said first edge and wherein said second heat insulating element is configured to reduce the amount of heat that can escape from said second edge.4. The ribbon fiber of claim 3 , wherein said first heat insulating element is not in direct contact with said second heat insulating element.5. The ribbon fiber of claim 3 , wherein said shorter aspect comprises a first side and a second side claim 3 , wherein said first heat insulating element is configured to reduce the amount of heat that can escape from a portion of at least one of said first side and said second side.6. The ribbon fiber of ...

HIGH POWER LASERS, WAVELENGTH CONVERSIONS, AND MATCHING WAVELENGTHS FOR USE ENVIRONMENTS

High power lasers and high power laser systems that provide high power laser beams having preselected wavelengths and characteristics to optimize or enhance laser beam performance in predetermined environments, conditions and use requirements. In particular, lasers, methods and systems that relate to, among other things, Raman lasers, up conversion lasers, wavelength conversion laser systems, and multi-laser systems that are configured to match and create specific and predetermined wavelengths at specific points along an optical path having varying requirements along that path. 1. A high power Raman laser comprising:a. a conversion optical fiber having a proximal end and a distal end;b. the proximal end in optical association with a primary laser source for providing a primary laser beam to the conversion optical fiber;{'sup': 'rd', 'c. a means for obtaining at least a 3order Raman emission providing an emission laser beam; and,'}d. a means for propagating the emission laser beam from the distal end of the conversion optical fiber.2. The high power Raman laser of claim 1 , wherein the means for obtaining the at least 3order Raman emission comprises the optical conversion fiber having a core diameter and length between the distal and proximal ends claim 1 , whereby the at least 3Raman emission is obtained.3. The high power Raman laser of claim 1 , wherein the means for obtaining the at least 3order Raman emission comprises a grating to reflect the wavelength of the primary laser beam.4. The high power Raman laser of claim 1 , wherein the means for obtaining the at least 3order Raman emission comprises a mirror to reflect the wavelength of the primary laser beam.5. The high power Raman laser of claim 1 , wherein the means for obtaining the at least 3order Raman emission comprises a grating incorporated into the conversion fiber.6. The high power Raman laser of claim 1 , wherein the means for obtaining the at least 3order Raman emission comprises a first grating or ...

Planar waveguide

Disclosed is a planar waveguide including: a core (11) which is a flat plate through which light propagates; a cladding (12) which is a flat plate for reflecting the light in a state of being joined to an upper surface of the core (11); and a cladding (13) which is a flat plate for reflecting the light in a state of being joined to a lower surface of the core (11), in which each of the claddings (12) and (13) is a multilayer film in which multiple films made from different materials are layered. As a result, a material having a low index of refraction can be used as the material of the core (11), and the limit on materials usable as the material of the core (11) is relaxed.

WAVEGUIDE DESIGN FOR LINE SELECTION IN FIBER LASERS AND AMPLIFIERS

Rare earth doped fiber lasers can be robust and efficient sources of high quality light, but are usually limited to the highest gain transitions of the active species. But rare earths typically possess a multitude of potentially useful transitions that might be accessed if the dominant transition can be suppressed. In fiber lasers this suppression is complicated by the very high net gain the dominant transitions exhibit; effective suppression requires some mechanism distributed along the length of the fiber. We have developed a novel waveguide with resonant leakage elements that frustrate guidance at well-defined and selectable wavelengths. Based on this waveguide, we have fabricated a Large Mode Area Neodymium doped fiber with suppression of the four-level transition around 1060 nm, and demonstrated lasing on the three-level transition at 930 nm with good efficiency. 1. A waveguide , comprising:{'sub': 1', '2, 'a signal carrying waveguide region configured to propagate one or more modes comprising light having a first wavelength λand a second wavelength λ;'}a sink region; and{'sub': '2', 'an auxiliary waveguide region configured to resonantly couple light of said second wavelength λfrom said signal carrying waveguide region to said sink region.'}2. The waveguide of claim 1 , wherein said signal carrying waveguide region experiences wavelength selective coupling of said wavelength λthrough said auxiliary waveguide region to said sink region.3. The waveguide of claim 2 , wherein light at said wavelength λwill flow out of said signal carrying waveguide region to said sink region.4. The waveguide of claim 1 , wherein said signal carrying waveguide region and said sink region experience no coupling except through said auxiliary waveguide region.5. The waveguide of claim 2 , wherein said wavelength selective coupling occurs when the effective index of each mode of the one or more modes in said signal-carrying waveguide region and at least one mode of the one or more ...

CHALCOGENIDE OPTICAL FIBER LINKS FOR QUANTUM COMMUNICATIONS SYSTEMS AND METHODS OF STORING AND RELEASING PHOTONS USING THE SAME

A quantum memory system includes a chalcogenide optical fiber link, a magnetic field generation unit and a pump laser. The chalcogenide optical fiber link includes a photon receiving end opposite a photon output end and is positioned within a magnetic field of the magnetic field generation unit when the magnetic field generation unit generates the magnetic field. The pump laser is optically coupled to the photon receiving end of the chalcogenide optical fiber link. The chalcogenide optical fiber link includes a core doped with a rare-earth element dopant. The rare-earth element dopant is configured to absorb a storage photon traversing the chalcogenide optical fiber link upon receipt of a first pump pulse output by the pump laser. Further, the rare-earth element dopant is configured to release the storage photon upon receipt of a second pump pulse output by the pump laser. 1. A chalcogenide optical fiber link for a quantum communication system , the chalcogenide optical fiber link comprising:a photon receiving end opposite a photon output end;chalcogenide glass comprising sulfur, selenium, and/or tellurium;a core doped with a rare-earth element dopant;wherein the rare-earth element dopant is configured to absorb a storage photon traversing the chalcogenide optical fiber link (i) when the storage photon transfers an electron of the rare-earth element dopant from a first split ground state to an excited energy state and (ii) when, upon receipt of a laser pump pulse, the laser pump pulse transfers the electron of the of the rare-earth element dopant from the excited energy state into a second split ground state; andwherein the rare-earth element dopant is configured to release the storage photon (i) when the electron of the of the rare-earth element dopant is transferred from the second split ground state to the excited energy state, upon receipt of another laser pump pulse and (ii) when the electron of the rare-earth element dopant decays from the excited energy state ...

Tunable Narrow-Linewidth Single-Frequency Linear-Polarization Laser Device

A tunable narrow-linewidth single-frequency linear-polarization laser device comprising a heat sink, a pumping source packaged on the heat sink, a first and second collimating lenses, a laser back cavity mirror, a thermal optical tunable filter, a rare-earth-ion heavily-doped multicomponent glass optical fiber, a super-structure polarization-maintaining fiber grating, a polarization-maintaining optical isolator, a polarization-maintaining optical fiber, and a thermoelectric refrigerating machine. The laser device uses a short and straight single-frequency resonant cavity structure, the heavily-doped and high-gain characteristics of the multicomponent glass optical fiber, a frequency selection role and wavelength tuning function of the thermal optical tunable filter and the superstructure polarization-maintaining fiber grating, and combines a precision temperature adjustment technology, and by means of real-time adjustment of distribution of reflection wavelengths and transmission wavelengths, the laser device changes spectrum peak overlapping positions, so as to implement stable output of wide-tuning-range, extra-narrow-linewidth, high-extinction-ratio and high-output-power continuously tunable single-frequency linear-polarization laser. 1. A tunable narrow-linewidth single-frequency linear-polarization laser device , characterized in that , comprising: a heat sink , a pumping source packaged on the heat sink , a first collimating lens , a laser back cavity mirror , a thermal optical tunable filter , a second collimating lens , a rare-earth-ion heavily-doped multicomponent glass optical fiber , a super-structure polarization-maintaining fiber grating , a polarization-maintaining optical isolator , a polarization-maintaining optical fiber , and a thermoelectric cooler TEC; wherein the pumping source , the first collimating lens , the laser back cavity mirror , the thermal optical tunable fiber , the second collimating lens , the rare-earth-ion heavily-doped ...

NANOPARTICLE DOPING FOR LASERS AND AMPLIFIERS OPERATING AT EYE-SAFER WAVELENGTHS, AND/OR EXHIBITING REDUCED STIMULATED BRILLOUIN SCATTERING

Methods for synthesizing fibers having nanoparticles therein are provided, as well as preforms and fibers incorporating nanoparticles. The nanoparticles may include one or more rare earth ions selected based on fluorescence at eye-safer wavelengths, surrounded by a low-phonon energy host. Nanoparticles that are not doped with rare earth ions may also be included as a co-dopant to help increase solubility of nanoparticles doped with rare earth ions in the silica matrix. The nanoparticles may be incorporated into a preform, which is then drawn to form fiber. The fibers may beneficially be incorporated into lasers and amplifiers that operate at eye safer wavelengths. Lasers and amplifiers incorporating the fibers may also beneficially exhibit reduced Stimulated Brillouin Scattering. 1. Fiber gain media , comprising:a silica cladding; and nanoparticles comprising a material having a lower phonon energy than the silica;', 'rare-earth ions,, 'a silica core comprisingwherein the fiber gain media emits wavelengths longer than approximately 1.4 μm.2. The fiber gain media of claim 1 , further comprising co-dopant nanoparticles.3. The fiber gain media of claim 1 , wherein the rare-earth ions are selected from the group consisting of Er claim 1 , Ho claim 1 , Tm claim 1 , Pr claim 1 , Dy claim 1 , and combinations thereof.4. The fiber gain media of claim 1 , wherein the nanoparticle material is selected from the group consisting of AlO claim 1 , LaF claim 1 , LuO claim 1 , GaO claim 1 , InO claim 1 , and combinations thereof5. The fiber gain media of claim 1 , wherein the one or more rare-earth ions are embedded in the nanoparticles.6. The fiber gain media of claim 2 , wherein the co-dopant nanoparticles are selected from the group consisting of AlO claim 2 , BiO claim 2 , PO claim 2 , GaO claim 2 , and combinations thereof7. The fiber gain media of claim 1 , wherein the nanoparticles range in size from about 5 to about 100 nm.8. The fiber gain media of claim 2 , wherein the co ...

Diamond-Based High-Stability Optical Devices for Precision Frequency and Time Generation

Chip technology for fabricating ultra-low-noise, high-stability optical devices for use in an optical atomic clock system. The proposed chip technology uses diamond material to form stabilized lasers, frequency references, and passive laser cavity structures. By utilizing the exceptional thermal conductivity of diamond and other optical and dielectric properties, a specific temperature range of operation is proposed that allows significant reduction of the total energy required to generate and maintain an ultra-stable laser. In each configuration, the diamond-based chip is cooled by a cryogenic cooler containing liquid nitrogen. 1. An optical resonator comprising:a spacer made of diamond and having a bore with openings at first and second surfaces of the spacer;a first mirror substrate made of diamond having a surface fusion bonded to the first surface of the spacer;a second mirror substrate made of diamond having a surface fusion bonded to the second surface of the spacer;a first mirror deposited on the surface of the first mirror substrate and positioned to cover the opening in the first surface of the spacer; anda second mirror deposited on the surface of the second mirror substrate and positioned to cover the opening in the second surface of the spacer,wherein the first and second mirrors are partially transmissive and parallel to each other to form a high-finesse Fabry-Pérot interferometer.2. The optical resonator as recited in claim 1 , wherein:the first mirror is bonded to the first surface of the spacer; andthe second mirror is bonded to the second surface of the spacer.3. The optical resonator as recited in claim 1 , wherein the diamond has a crystalline structure formed by chemical vapor deposition (CVD).4. The optical resonator as recited in claim 3 , wherein the spacer comprises a plurality of wafers fusion bonded across {001} surfaces.5. The optical resonator as recited in claim 3 , wherein the surfaces of the first and second mirror substrates on which ...

OPTICAL FIBER WITH MOSAIC FIBER

An optical fiber includes a monolithic elongated mosaic core having a longitudinal axis and configured with a silica-based medium with a uniform refractive index, and a plurality of coaxial elongated individual elements which do not waveguide light at a given wavelength and are received in the silica-glass medium. The refractive indices of the medium and individual anti- waveguiding elements together determine a cumulative effective refractive index of the mosaic core. The optical fiber further includes at least one cladding surrounding the mosaic core and provided with a cladding refractive index which is lower than the index of the mosaic core, so that the mosaic core waveguides the light at the given wavelength. 2. The optical fiber of claim 1 , wherein the individual elements of the mosaic core each have a silica-based composition and are configured as a completely non-waveguiding element.3. The optical fiber of claim 2 , wherein the silica based composition includes silica phosphate.4. The optical fiber of claim 2 , wherein the silica-based composition includes alumina silica.5. The optical fiber of claim 1 , wherein the mosaic core is configured to support a single mode or multiple modes.6. The optical fiber of claim 1 , wherein at least some of the individual elements are selectively doped with activators claim 1 , the activators being selected from the group consisting of rare earth elements and transitional metals and a combination thereof.7. The optical fiber of claim 1 , wherein at least some of the elements of the mosaic core are configured to amplify light while at least some other elements of the mosaic core are configured to absorb light.8. The optical fiber of claim 7 , wherein at least some of the individual light amplifying elements in the mosaic core are grouped together to amplify a fundamental mode claim 7 , the individual light absorbing elements are arranged to suppress high order mode amplification.9. The optical fiber of claim 1 , wherein ...

SOLID STATE LASER SYSTEM

A laser system comprising an RE:XAB gain medium within a resonator cavity. X is selected from Ca, Lu, Yb, Nd, Sm, Eu, Gd, Ga, Tb, Dy, Ho, Er, and RE is selected from Lu, Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Pr, Tm, Cr, Ho. The system further comprises a pumping source having optical output directed towards the gain medium. A laser controller operates the pumping source. The system further comprises a heat spreader, the heat spreader in thermal communication with the gain medium through a surface wherein the pump source has optical output incident. 1. A laser system comprising:an RE:XAB gain medium, the gain medium within a resonator cavity, where X is selected from Ca, Lu, Yb, Nd, Sm, Eu, Gd, Ga, Tb, Dy, Ho, Er, and where RE is selected from Lu, Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Pr, Tm, Cr, Ho;a pumping source, the pumping source having optical output directed towards the gain medium;a laser controller, the laser controller operating the pumping source; anda heat spreader, the heat spreader in thermal communication with the gain medium through a surface wherein the pump source has optical output incident.2. The laser of claim 1 , wherein the pumping source has optical output peaked between about 920 nm to 960 nm.3. The laser of claim 1 , wherein the pumping source has optical output peaked between about 965 nm to 985 nm.4. The laser system of claim 1 , wherein the pumping source is either σ-polarized or π-polarized with respect to the RE:XAB gain medium.5. The laser system of claim 1 , further comprises a polarizer6. The laser system of claim 5 , wherein the polarizer is within the laser resonator.7. The laser system of claim 1 , wherein the resonator cavity has a convex mirror.8. The laser system of claim 1 , wherein the pump source has optical output peaked between about 1520 nm to 1540 nm.9. The laser system of claim 1 , wherein the pump source has optical output peaked between about 1445 nm to 1465 nm.10. The laser system of claim 1 , wherein the pumping source ...

CHALCOGENIDE OPTICAL FIBER LINKS FOR QUANTUM COMMUNICATION SYSTEMS AND METHODS OF STORING AND RELEASING PHOTONS USING THE SAME

A quantum memory system includes a chalcogenide optical fiber link, a magnetic field generation unit and a pump laser. The chalcogenide optical fiber link includes a photon receiving end opposite a photon output end and is positioned within a magnetic field of the magnetic field generation unit when the magnetic field generation unit generates the magnetic field. The pump laser is optically coupled to the photon receiving end of the chalcogenide optical fiber link. The chalcogenide optical fiber link includes a core doped with a rare-earth element dopant. The rare-earth element dopant is configured to absorb a storage photon traversing the chalcogenide optical fiber link upon receipt of a first pump pulse output by the pump laser. Further, the rare-earth element dopant is configured to release the storage photon upon receipt of a second pump pulse output by the pump laser. 1. A chalcogenide optical fiber link , comprising:a photon receiving end opposite a photon output end;chalcogenide glass comprising at least one of (i) sulfur, (ii) selenium, and (iii) tellurium;a core doped with a rare-earth element dopant;wherein the chalcogenide optical fiber link has a length of at least 0.25 m;wherein the rare-earth element dopant is configured to absorb a storage photon traversing the chalcogenide optical fiber link (i) when the storage photon transfers an electron of the rare-earth element dopant from a first split ground state to an excited energy state and (ii) when, upon receipt of a laser pump pulse, the laser pump pulse transfers the electron of the of the rare-earth element dopant from the excited energy state into a second split ground state; andwherein the rare-earth element dopant is configured to release the storage photon (i) when the electron of the of the rare-earth element dopant is transferred from the second split ground state to the excited energy state, upon receipt of another laser pump pulse and (ii) when the electron of the rare-earth element dopant ...

Moderately multimodal amplifying fibre

According to one aspect, a few-mode amplifying fiber in a given spectral band of use is provided. The few-mode amplifying fiber comprises a cladding having a given refractive index (n 0 ) and at least one core of refractive index and of dimensions suited to the propagation of a finite number of spatial modes in the spectral band of use of the fiber, a spatial propagation mode corresponding to a channel for transporting information. The core comprises a first solid material having a given first refractive index (n 1 ) strictly greater than the refractive index of the cladding (n 0 ), and, within said first material, inclusions spatially separated from one another, formed by longitudinal bars comprising a second solid material having a second refractive index (n 2 ) strictly greater than the first refractive index (n 1 ), at least one of said inclusions being actively doped.

OPTICAL TUBE WAVEGUIDE LASING MEDIUM AND RELATED METHOD

Laser waveguides, methods and systems for forming a laser waveguide are provided. The waveguide includes an inner cladding layer surrounding a central axis and a glass core surrounding and located outside of the inner cladding layer. The glass core includes a laser-active material. The waveguide includes an outer cladding layer surrounding and located outside of the glass core. The inner cladding, outer cladding and/or core may surround a hollow central channel or bore and may be annular in shape. 1. A laser waveguide lasing medium comprising:an inner cladding layer surrounding a central axis;a glass core surrounding and located outside of the inner cladding layer, the glass core including a laser-active material; andan outer cladding layer surrounding and located outside of the glass core.2. The laser waveguide lasing medium of claim 1 , wherein the inner cladding layer surrounds a hollow area that extends between opposing first and second ends along an entire length of the laser waveguide lasing medium.3. The laser waveguide lasing medium of claim 2 , wherein an average thickness in a radial direction of the inner cladding layer is greater than an average thickness in the radial direction of the glass core claim 2 , wherein an average thickness in the radial direction of the outer cladding layer is greater than the average thickness in the radial direction of the inner cladding layer.4. The laser waveguide lasing medium of claim 2 , wherein at least one of the inner cladding layer claim 2 , the glass core and the outer cladding layer includes one or more doping materials such that an index of refraction of the glass core is greater than an index of refraction of the inner cladding layer and is greater than an index of refraction of the outer cladding layer.5. The laser waveguide lasing medium of claim 1 , wherein the inner cladding layer claim 1 , the glass core and the outer cladding layer are formed from a silica material.6. The laser waveguide lasing medium of ...

OPTICAL FIBERS, SOURCES OF OPTICAL RADIATION AND METHODS FOR PROVIDING LOW-SPECKLE OPTICAL RADIATION

The present disclosure relates more particularly to active optical fibers, amplified spontaneous emission (ASE) sources using such active optical fibers, and imaging and detection systems and methods using such ASE sources. In one aspect, the disclosure provides an active optical fiber that includes a rare earth-doped gain core configured to emit radiation at at least a peak wavelength emitted wavelength when pumped with pump radiation having a pump wavelength; a pump core surrounding the gain core; and a cladding surrounding the pump core, wherein the value M=16R(NA)/λin which R is the gain core radius, NA is the active optical fiber numerical aperture, and λ is the peak emitted wavelength, is at least 50, or at least 100. The present disclosure also provides an optical source that includes the optical fiber coupled to a pump source. 2. The source of optical radiation according to claim 1 , wherein the gain core has a diameter in the range of about 50 μm to about 3000 μm.3. The source of optical radiation according to claim 1 , wherein the gain core of the active optical fiber has a diameter in the range of about 80 μm to about 1200 μm.4. The source of optical radiation according to claim 1 , wherein the pump core of the active optical fiber has a cross-sectional shape that is polygonal.5. The source of optical radiation according to claim 1 , wherein the pump core of the active optical fiber has an average thickness (i.e. claim 1 , radially averaged) in the range of about 15 μm to about 1000 μm.6. (canceled)7. The source of optical radiation according to claim 1 , wherein the cladding of the active optical fiber has an average thickness (i.e. claim 1 , radially averaged) in the range of about 15 μm to about 1000 μm.8. (canceled)9. The source of optical radiation according to claim 1 , wherein the gain core of the active optical fiber is formed from doped silica glass.10. The source of optical radiation according to claim 1 , wherein the gain core of the active ...

Rare Earth Pnictides for Strain Management

Systems and methods described herein may include a first semiconductor layer with a first lattice constant, a rare earth pnictide buffer epitaxially grown over the first semiconductor, wherein a first region of the rare earth pnictide buffer adjacent to the first semiconductor has a net strain that is less than 1%, a second semiconductor layer epitaxially grown over the rare earth pnictide buffer, wherein a second region of the rare earth pnictide buffer adjacent to the second semiconductor has a net strain that is a desired strain, and wherein the rare earth pnictide buffer may comprise one or more rare earth elements and one or more Group V elements. In some examples, the desired strain is approximately zero. 1. A layer structure , comprising:a first semiconductor layer with a first lattice constant;a rare earth pnictide buffer epitaxially grown over the first semiconductor, wherein a first region of the rare earth pnictide buffer adjacent to the first semiconductor has a first net strain that is less than 1%;a second semiconductor layer epitaxially grown over the rare earth pnictide buffer, wherein a second region of the rare earth pnictide buffer adjacent to the second semiconductor has a second net strain that is a desired strain; one or more rare earth elements, and', 'one or more Group V elements., 'wherein the rare earth pnictide buffer comprises2. The layer structure of claim 1 , wherein the desired strain is less than 1%.3. The layer structure of claim 1 , wherein the first region of the rare earth pnictide buffer comprises:a first sublayer comprising a first rare earth pnictide alloy and having a first thickness;a second sublayer comprising a second rare earth pnictide alloy and having a second thickness;wherein the ratio of the first thickness to the second thickness results in the first net strain of the first region being less than 1%.4. The layer structure of claim 3 , wherein the second region of the rare earth pnictide buffer comprises:a third ...

SYSTEM AND METHOD FOR LASER SYSTEM HAVING NON-PLANAR THIN DISC GAIN MEDIA

The present disclosure relates to a laser system. The laser system may have at least non-flat gain media disc. At least one pump source may be configured to generate a beam that pumps the non-flat gain media disc. A laser cavity may be formed by the pump source and the non-flat gain media disc. An output coupler may be included for receiving and directing the output beam toward an external component. 1. A laser system comprising:a non-flat gain media disc;at least one pump source configured to generate a beam that pumps a convex surface of the non-flat gain media disc;a laser cavity formed by at least one optical component and the non-flat gain media disc; andan output coupler enabling the laser beam to exit the laser cavity.2. The laser system of claim 1 , further comprising a mirror for receiving and reflecting the beam from the pump source back to the at least one optical component.3. The laser system of claim 1 , wherein the non-flat gain media disc comprises a hemispherical shaped gain media disc.4. The laser system of claim 3 , wherein the at least one optical component includes a substrate secured to one surface of the hemispherical shaped gain media disc.5. The laser system of claim 4 , wherein the at least one optical component further includes a highly reflective coating on a surface of the substrate opposite to that of which the hemispherical shaped gain media disc is secured.6. The laser system of claim 1 , further comprising:an additional pump source for generating an additional beam; anda mirror for reflecting additional beam toward the at least one optical component.7. The laser system of claim 1 , wherein the non-flat gain media disc comprises a solid state matrix material.8. The laser system of claim 7 , wherein the solid state matrix material includes at least one type of Rare-Earth dopant claim 7 , or at least one type of transition metal claim 7 , or a combination of at least one type of Rare-Earth dopant and at least one type of transition metal ...

Solid state ring laser gyroscope having a primary cavity and a pumping cavity

A ring laser gyroscope is provided. A light source is configured to generate light of a first wavelength. A plurality primary cavity mirrors are configured to route light of a second wavelength around a primary cavity to a readout device. One primary cavity mirror of the plurality of primary cavity mirrors includes a gain medium. The pumping mirror and the one primary cavity mirror including the gain medium is positioned and configured to reflect the light of the first wavelength back and forth in a pumping cavity through the gain medium, wherein the light of the first wavelength stimulates the gain medium to generate the light of the second wavelength that are reflected around the primary cavity to the readout device.

FEMTOSECOND FIBER OSCILLATOR

An optical assembly provides dispersion control, modelocking, spectral filtering, and/or the like in a laser cavity. For example, the optical assembly may comprise a diffraction grating pair arranged to temporally and spatially disperse a beam on a forward pass through the optical assembly, a reflective device at an end of the optical assembly, and a focusing optic arranged to create a beam waist at the reflective device. The beam waist created at the reflective device may cause the beam to be inverted on a reverse pass through the optical assembly, and a temporal dispersion and a spatial dispersion of the beam may be doubled on the reverse pass through the optical assembly to form a temporally and spatially dispersed output from the optical assembly. 1. A fiber oscillator , comprising: 'wherein the beam propagates in a forward direction through the laser cavity and experiences gain in the active fiber;', 'a laser source configured to provide a beam into an active fiber of a laser cavity,'}an output coupler that comprises an input port arranged to receive the beam after the beam passes through the active fiber, a first output port that couples into the laser cavity, and a second output port that leads to an output fiber; and a diffraction grating pair arranged to temporally and spatially disperse the beam on a forward pass through the optical assembly;', 'a reflective device at an end of the optical assembly; and', wherein the beam waist created at the reflective device causes the beam to be inverted on a reverse pass through the optical assembly, and', 'wherein a temporal dispersion and a spatial dispersion of the beam are doubled on the reverse pass through the optical assembly to form a temporally and spatially dispersed output that couples back into the laser cavity., 'a focusing optic arranged to create a beam waist at the reflective device,'}], 'an optical assembly coupled between the laser source and the output coupler, wherein the optical assembly comprises2 ...

Amplifying Optical Fiber and Production Method

Disclosed is an amplifying optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and a surrounding optical cladding that is suitable for confining the optical signal transmitted in the central core. The central core is formed from a main matrix that contains nanoparticles doped with at least one rare earth element. The weight concentration of the rare earth dopants in the nanoparticles is typically between about 1 and 20 percent, and the nanoparticle concentration in the central core's main matrix is between about 0.05 percent and 1 percent by volume. The disclosed optical fiber incorporates rare earth ions at high concentrations yet avoids the phenomenon of photodarkening at high transmission power.

LASER SYSTEM AND COMPONENTS OF SAME

A laser system includes a laser diode that, upon activation, selectively produces a continuous wave of laser light or uniformly spaced, intermittent pulses of laser light. The system further includes a laser focuser with a plurality of lenses that focus the laser light produces by the laser diode and direct the laser light to an optical resonator. The optical resonator includes a lasing medium that, when intersected by the laser light from the laser diode, produces a beam of laser light with a wavelength that may be used for therapeutic treatment. The system is operable to produce the therapeutic laser light when the laser diode is operating in either the continuous wave mode or the pulsed mode, without moving components of the system relative to one another. 1. A laser focuser comprising:a first lens having a first optical axis, a first optically powered surface, and a second optically powered surface, the first optically powered surface opposite the second optically powered surface along the first optical axis, wherein the first optically powered surface is curved having a first constant radius of curvature, and the second optically powered surface is curved having a second constant radius of curvature;a second lens having a second optical axis, the second lens positioned with respect to the first lens such that the first optical axis and the second optical axis are collinear, the second lens further having a third optically powered surface and a fourth optically powered surface, the third optically powered surface opposite the fourth optically powered surface along the second optical axis, wherein the third optically powered surface is curved having a third constant radius of curvature, and the fourth optically powered surface is curved having a fourth constant radius of curvature;a third lens having a third optical axis, the third lens positioned with respect to the first lens and the second lens such that the first optical axis and the third optical axis are ...

Electric pumping of rare-earth-doped silicon for optical emission

본 발명은 제 1 p형 영역 및 제 1 n형 영역을 구비하는 반도체 내부의 p-n 접합과, 희토류 원소(rare-earth element)로 도핑(doping)된 p-n 접합 부근에 위치한 영역을 함께 구비한 구조체에 관한 것이다. 또한, 본 구조체는 p형 영역 및 n형 영역 중 하나에 연결되어, 희토류 원소의 원자들을 여기시키기 위해 전하 캐리어(carrier)를 제공하는 전하 소스(charge source)를 포함한다. 또한, 바이폴라 접합 트랜지스터(bipolar junction transistor)를 제공하는 단계와, 트랜지스터의 콜렉터(collector) 내의 한 영역을 희토류 원소로 도핑하는 단계와, 트랜지스터를 바이어싱(biasing)하여 희토류 원소로 도핑된 영역으로부터 방사광(light emission)을 생성하는 단계를 포함하는 구조체 생산 방법이 제공된다. The present invention relates to a structure having a pn junction inside a semiconductor having a first p-type region and a first n-type region, and a region located near a pn junction doped with a rare-earth element. It is about. The structure also includes a charge source coupled to one of the p-type and n-type regions to provide a charge carrier to excite the atoms of the rare earth element. Further, there is provided a method of providing a bipolar junction transistor, doping a region in the collector of the transistor with rare earth elements, and biasing the transistor to radiate light from the region doped with the rare earth element. There is provided a structure production method comprising the step of generating light emission.

Array laser radar light-dividing device and its light-splitting method

本发明一种阵列式光源分光装置及其分光方法，其包括：输入信号光的种子源、与该种子源连接的光纤放大器、以及与该光纤放大器连接的光分路器，所述光分路器设有N路光纤，N为自然数；其中，所述光分路器将所述种子源的信号光分成N路并进行输出。本发明种子源的信号光通过光分路器就变成了多路信号光输出再通过每天支路的放大器将功率放大就变成了多路信号光输出；1550纳米激光的重复频率可以达到兆赫兹，而且该激光具有较高的水吸收系数，当该波段激光辐射人眼时，对人眼的损伤阈值较高，因而该波段激光具有人眼安全特性；本发明光源可采用同步工作方式，在自动驾驶和3D扫描等领域具备广阔的应用前景。

Optical fiber, optical amplifer, optical fiber laser, and manufacture method for optical fiber primary prefabticated member

本发明涉及光纤、光学放大器、光纤激光器和光纤初级预制件制造方法，公开了一种掺杂有稀土的辐射不敏感光纤，其从中心到外周依次包括：中央纤芯(11)，用于传输和放大光信号，其中，所述中央纤芯(11)包括包含纳米颗粒的纤芯基质，所述纳米颗粒由包含来自稀土族的掺杂物的纳米颗粒基质构成；包住所述中央纤芯(11)的光包层，用于限制所述中央纤芯(11)所传输的光信号，其中，所述光包层具有沿着所述光纤的长度延伸的多个孔(10)，所述孔(10)相互隔开一定的间距(Λ 孔 )；以及外包层。

Matter concentration measuring method in matter concentration measuring apparatus and blood in blood

本发明用非侵入且高精度简单的构成测定血中物质浓度。将光源(10)中产生的激光(100)对被试验者生物体上皮(生物体)F局部照射，利用光检测器(光检测部)(40)检测其扩散反射光(200)。使用的激光是中红外光，其波长例如是9.26μm由光源(10)振荡出。在光源中将从激发光源(11)振荡出的脉冲状的激发光(101)由OPO(光参量振荡器)(12)变换成长波长并放大来产生激光(100)。在导光部(20)和生物体上皮F之间设置由对中红外光透明的材料构成的大致平板状的窗口(30)，窗口和生物体上皮F紧密接触。能够使用根据监测用光检测器和光检测器的信号比计算的标准化后的光强度计算间质液中的葡萄糖浓度。

Amplifying optical fibre and production method

一种放大光纤，包括：中央纤芯(10)，适合于传输和放大光学信号；以及光学包层(11)，围绕中央纤芯并且适合于将传输的光学信号局限于芯中，中央纤芯由主基质形成并且包含掺杂有稀土的纳米粒子(5)。稀土掺杂物在各纳米粒子中的重量比浓度介于重量比1％与20％(wt.％)之间，并且纳米粒子在中央纤芯的主基质中的浓度介于体积比0.05％与1％之间。这样的光纤并入高浓度稀土离子，而又在高功率避免光暗化现象。

Eyesafe coherent laser radar for velocity and position measurements

A coherent laser radar system operating at an eyesafe wavelength above 1.4 microns has been provided for measurement of the position and velocity of hard targets and aerosol targets, said system comprising a frequency-stable master laser and an injection-seeded Q-switched slave laser for generating signals for transmission to the target. Means for obtaining highly accurate velocity and range measurements are provided. Data from signal transmissions and receptions taken over a range of angles are analyzed to map target positions and velocities in time and space.

Laser device and method for a vehicle

A laser illumination or dazzler device and method. More specifically, examples of the present invention provide laser illumination or dazzling devices power by one or more violet, blue, or green laser diodes characterized by a wavelength from about 390 nm to about 550 nm. In some examples the laser illumination or dazzling devices include a laser pumped phosphor wherein a laser beam with a first wavelength excites a phosphor member to emit electromagnetic at a second wavelength. In various examples, laser illumination or dazzling devices according to the present invention include polar, non-polar, or semi-polar laser diodes. In a specific example, a single laser illumination or dazzling device includes a plurality of violet, blue, or green laser diodes. There are other examples as well.

Wavelength up-converting transparent glass-ceramics and method for producing the same

Rare earth doped optical glasses

A glass component in an optical system, which may be a lazing or an optical amplifying medium, comprising a silicate base glass doped with at least two Group III B elements, the glass, and a method of preventing clustering of a rare earth metal ion in the glass.

Ultrashort Femtosecond Laser Apparatus For High-Brightness beam Comprising Polarizer

공간적으로 서로 수직방향의 Ng, Np, Nm축을 갖는 제 1 레이저 매질; 상기 제 1 레이저 매질의 Ng축에 실질적으로 평행한 Np축을 갖도록 배치된 제 2 레이저 매질; 및 상기 제 1 레이저 매질 및 상기 제 2 레이저 매질에 각각 인접하여 배치된 제 1 레이저 다이오드 및 제 2 레이저 다이오드 및 제 1 레이저 매질 및 제 2 레이저 매질로부터 발생된 레이저 빔이 증폭되어 다시 상기 제 1 레이저 매질에 입사되는 레이저 빔의 경로에 배치된 편광 변환기를 포함하고, 제 1 레이저 매질과 제 2 레이저 매질 각각은, 상기 제 1 레이저 매질의 Np축과 제 2 레이저 매질의 Nm축이 상기 편광 변환기에 의해 변경된 상기 레이저 빔의 편광방향에 평행하도록 배치되는 펨토초 레이저 장치를 제공한다.

Semiconductor laser

Apparatus and method for the generation of high-power femtosecond pulses from a fiber amplifier

An apparatus generates femtosecond pulses from laser amplifiers by nonlinear frequency conversion. The implementation of nonlinear frequency-conversion allows the design of highly nonlinear amplifiers at a signal wavelength (SW), while still preserving a high-quality pulse at an approximately frequency-doubled wavelength (FDW). Nonlinear frequency-conversion also allows for limited wavelength tuning of the FDW. As an example, the output from a nonlinear fiber amplifier is frequency-converted. By controlling the polarization state in the nonlinear fiber amplifier and by operating in the soliton-supporting dispersion regime of the host glass, an efficient nonlinear pulse compression for the SW is obtained. The generated pulse width is optimized by utilizing soliton compression in the presence of the Raman-self-frequency shift in the nonlinear fiber amplifier at the SW. High-power pulses are obtained by employing fiber amplifiers with large core-diameters. The efficiency of the nonlinear fiber amplifier is optimized by using a double clad fiber (i.e., a fiber with a double-step refractive index profile) and by pumping light directly into the inner core of this fiber. Periodically poled LiNbO 3 (PPLN) is used for efficient conversion of the SW to a FDW. The quality of the pulses at the FDW can further be improved by nonlinear frequency conversion of the compressed and Raman-shifted signal pulses at the SW. The use of Raman-shifting further increases the tuning range at the FDW. For applications in confocal microscopy, a special linear fiber amplifier is used.

Double clad fiber laser device

本发明提供一种双包层光纤装置。该双包层光纤装置包括双包层光纤、泵浦组合器、至少一个第一激光二极管以及至少一个第二激光二极管。双包层光纤包括芯体和包层。泵浦组合器通过双包层光纤的一端分别向芯体和包层提供泵浦光。至少一个第一激光二极管通过泵浦组合器向包层提供第一泵浦光。至少一个第二激光二极管通过泵浦组合器向芯体提供第二泵浦光。

Rare earth doped aluminosilicate glasses, especially for use as active lasant material in high performance bulk lasers

Aufgabe war es, Gläser mit guten Fluoreszenz- und gleichzeitig entsprechenden thermo-mechanischen Eigenschaften bereitzustellen, welche gegenüber erhöhter thermischer Belastung dauerhaft mechanisch stabil sind. Hierfür werden Seltenerd-dotierte Aluminosilicatgläser mit einer Grundzusammensetzung von 50–75 Mol% SiO2, 8–25 Mol% Al2O3, 2–20 Mol% Li2O 2–20 Mol% MgO und/oder 2–20 Mol% ZnO (insgesamt nicht mehr als 30 Mol%) sowie 0,01–10 Mol% Seltenerdoxid vorgeschlagen.

Silicon nitride thin film for optical device and fabrication method thereof

본 발명은 비정질 실리콘 양자점과 희토류 원소가 함께 분산되어 포함되며 비정질 실리콘 양자점에 의해 희토류 원소가 여기되어 광을 방출시키는 광소자용 실리콘 질화물 박막 및 그 제조방법을 제공한다. 이를 이용하면, 비정질 실리콘 양자점이 희토류 원소의 발광특성을 매우 향상시켜 우수한 성능의 광소자를 만들 수 있다. The present invention provides a silicon nitride thin film for an optical device and a method for manufacturing the same, wherein the amorphous silicon quantum dots and rare earth elements are dispersed and included together and the rare earth elements are excited by the amorphous silicon quantum dots to emit light. By using this, an amorphous silicon quantum dot can greatly improve the light emitting characteristics of the rare earth element, thereby making an optical device having excellent performance. 양자점, 비정질 실리콘 양자점, 희토류, 광소자 Quantum dots, amorphous silicon quantum dots, rare earths, optical devices

Ase light source

There is provided, in a light source having at least an excitation light source, a rare-earth doped, fluoride optical waveguide, a multiplexing means and an optical fiber for output, an ASE light source characterized in that an ASE light that has a wavelength shorter than an excitation light and that has been generated by an up-conversion process generated in an inside of the rare-earth doped, optical waveguide is outputted to outside via at least one long-wavelength cut-off device provided inside or outside of an apparatus.

Rare earth pnictide for contingency management

本文所述的系统和方法可以包括具有第一晶格常数的第一半导体层，在第一半导体上外延生长的稀土磷属元素化物缓冲层，其中与第一半导体相邻的稀土磷属元素化物缓冲层的第一区域具有小于1％的净应变，在稀土磷属元素化物缓冲层上外延生长的第二半导体层，其中与第二半导体相邻的稀土磷属元素化物缓冲层的第二区域具有作为所需应变的净应变，并且其中稀土磷属元素化物缓冲层可以包括一种或多种稀土元素以及一种或多种V族元素。在一些示例中，期望的应变近似为零。

L-band amplification with detuned 980nm pump

A method of operating an optical amplifier for improved gain and pump-to- signal conversion efficiency in a long wavelength spectral region (L-band) o f the emission spectrum of a rare earth doped gain medium having a known pump absorption band involves the steps of providing an optical signal to the amplifier having a large-signal input power; and providing pumping light to the amplifier having a wavelength that is different from a center wavelength of the known pump absorption band for amplifying the optical signal. Signal gain and improved pump-to-signal conversion efficiency was demonstrated for an erbium L-band signal by detuning the pump between about ~0-30nm on either si de of the pump band center wavelength of 979-980nm. An optical amplifier employing the described method is also disclosed.

AMPLIFIER OPTICAL FIBER AND METHOD OF MANUFACTURE

High energy ultra-short light pulse generation system with spectral shaping module

L’invention concerne un système de génération d’impulsion lumineuse ultra-courte de forte énergie comprenant un générateur (1) adapté pour générer au moins une impulsion source (11) courte étirée temporellement, un amplificateur optique (2) à amplification non-linéaire et à compression non-linéaire comprenant une fibre optique amplificatrice ayant une dispersion de vitesse de groupe β2 négative, ledit amplificateur optique (2) à amplification non-linéaire et à compression non-linéaire étant adapté pour amplifier et comprimer non-linéairement ladite impulsion source (11) courte étirée temporellement et pour former une impulsion amplifiée (12, 120). Selon l’invention, le système comporte un module de mise en forme spectrale (3) disposé en aval de ladite fibre optique amplificatrice, le module de mise en forme spectrale (3) comprenant un composant optique ayant une dispersion de vitesse de groupe β2 positive, ledit module de mise en forme spectrale (3) étant adapté pour recevoir et élargir et lisser spectralement ladite impulsion amplifiée (12, 120).Figure pour l’abrégé : Fig. 1 The invention relates to a high energy ultra-short light pulse generation system comprising a generator (1) adapted to generate at least one short time-stretched source pulse (11), an optical amplifier (2) with non-linear amplification and non-linear compression comprising an amplifying optical fiber having negative β2 group velocity dispersion, said non-linearly amplifying and non-linearly compressing optical amplifier (2) being adapted to non-linearly amplify and compress said source pulse (11) short stretched temporally and to form an amplified pulse (12, 120). According to the invention, the system comprises a spectral shaping module (3) disposed downstream of said amplifying optical fiber, the spectral shaping module (3) comprising an optical component having a positive group speed dispersion β2 , said spectral shaping module (3) being adapted to receive and spectrally broaden and smooth ...

DEVICE FOR GENERATING LASER PULSES AMPLIFIED BY OPTICAL FIBERS WITH PHOTONIC LAYERS

DOPED OPTICAL FIBER IN RARE EARTHS THAT IS INSENSITIVE TO IRRADIATION

L'invention concerne une fibre optique comprenant, du centre vers la périphérie : -un cœur central (11) adapté à transmettre et amplifier un signal optique, le cœur central (11) étant constitué d'une matrice de cœur comprenant des nanoparticules, les nanoparticules étant formées d'une matrice de nanoparticule comprenant des éléments dopants du groupe des terres rares ; -une gaine optique entourant le cœur central (11) adaptée à confiner le signal optique transmis par le cœur central (11), la gaine optique présentant une pluralité de trous (10) qui s'étendent suivant la longueur de la fibre optique, les trous (10) étant séparés entre eux d'un pas (Λ ) ; -une gaine extérieure. The invention relates to an optical fiber comprising, from the center towards the periphery: - a central core (11) suitable for transmitting and amplifying an optical signal, the central core (11) being made up of a core matrix comprising nanoparticles, the nanoparticles being formed of a nanoparticle matrix comprising doping elements from the group of rare earths; - an optical sheath surrounding the central core (11) adapted to confine the optical signal transmitted by the central core (11), the optical sheath having a plurality of holes (10) which extend along the length of the optical fiber, the holes (10) being separated from each other by a pitch (Λ); -an outer sheath.

Light energy generators and amplifiers

DEVICE FOR GENERATING LASER PULSES AMPLIFIED BY OPTICAL FIBERS WITH PHOTONIC LAYERS

L'invention concerne un dispositif de génération d'impulsions laser amplifiées comportant au moins un laser impulsionnel piloté par au moins un moyen de déclenchement émettant un faisceau laser maître multiplexé spatialement en des faisceaux laser élémentaires qui sont amplifiés en parallèle par au moins deux amplificateurs optiques, chacun des faisceaux laser élémentaires amplifiés étant dirigé vers un volume de focalisation unique. Selon l'invention, chaque amplificateur (12) optique comporte une fibre à couches photoniques (2), au moins un moyen de pompage (3, 5) optique à diodes laser produisant au moins une onde de pompe (4) pour pompage longitudinal de ladite fibre et un moyen de focaliser (7) dans le volume de focalisation le faisceau amplifié (15) produit par la fibre, la fibre allongée en silice ou verre comportant un coeur dopé, le pompage de chaque amplificateur optique étant en continu et la génération des impulsions optiques amplifiées étant obtenue directement par le laser impulsionnel, ledit dispositif ayant une configuration du multiplexage, de l'amplification parallèle et de la focalisation de chaque faisceau permettant de garantir la synchronisation des impulsions optiques produites par l'ensemble des amplificateurs optiques à fibre afin qu'elles arrivent selon un séquencement temporel prédéterminé dans le volume de focalisation. The invention relates to a device for generating amplified laser pulses comprising at least one pulse laser driven by at least one triggering means emitting a spatially multiplexed master laser beam into elementary laser beams which are amplified in parallel by at least two optical amplifiers. each of the amplified elementary laser beams being directed to a single focusing volume. According to the invention, each optical amplifier (12) comprises a photonic layer fiber (2), at least one laser diode optical pumping means (3, 5) producing at least one pump wave (4) for longitudinal pumping of said ...

Optics tube waveguide emits laser medium and associated method

提供了激光波导、用于形成激光波导的方法和系统。该波导包括围绕中心轴的内包层和围绕内包层并位于内包层的外部的玻璃芯。玻璃芯包括激光活性材料。该波导包括围绕玻璃芯并位于玻璃芯的外部的外包层。内包层、外包层和/或芯可以围绕中空中心通道或孔并且可以是环形形状。

Blood substance concentration measuring device and blood substance concentration measuring method

本发明用非侵入且高精度简单的构成测定血中物质浓度。将光源(10)中产生的激光(100)对被试验者生物体上皮(生物体)F局部照射，利用光检测器(光检测部)(40)检测其扩散反射光(200)。使用的激光是中红外光，其波长例如是9.26μm由光源(10)振荡出。在光源中将从激发光源(11)振荡出的脉冲状的激发光(101)由OPO(光参量振荡器)(12)变换成长波长并放大来产生激光(100)。在导光部(20)和生物体上皮F之间设置由对中红外光透明的材料构成的大致平板状的窗口(30)，窗口和生物体上皮F紧密接触。能够使用根据监测用光检测器和光检测器的信号比计算的标准化后的光强度计算间质液中的葡萄糖浓度。

Rare earth pnictides for strain management

Systems and methods described herein may include a first semiconductor layer with a first lattice constant, a rare earth pnictide buffer epitaxially grown over the first semiconductor, wherein a first region of the rare earth pnictide buffer adjacent to the first semiconductor has a net strain that is less than 1%, a second semiconductor layer epitaxially grown over the rare earth pnictide buffer, wherein a second region of the rare earth pnictide buffer adjacent to the second semiconductor has a net strain that is a desired strain, and wherein the rare earth pnictide buffer may comprise one or more rare earth elements and one or more Group V elements. In some examples, the desired strain is approximately zero.

Low phonon energy gain medium and related active devices

Using sol-gel techniques, an optical gain medium has been fabricated comprising a glass ceramic host material that includes clusters of crystalline oxide material, especially tin oxide, and that is doped with active ions concentrated at the clusters. The active ions are preferentially located at the nanoclusters so that they experience the relatively low phonon energy of the oxide and are insensitive to the phonon energy of the host. A host with a high phonon energy, such as silica, can therefore be used without the usual drawback of reduced carrier lifetimes through enhanced nonradiative decay rates.

Electric pumping of rare-earth-doped silicon for optical emission

A structure having a p-n junction in a semiconductor having a first p-type region and a first n-type region along with a region located in the vicinity of the p-n junction that is doped with a rare-earth element. In addition, the structure includes a charge source coupled to one of the p- type region and n-type region for providing charge carriers to excite atoms of the rare-earth element. Also provided is a method for producing the structure that includes providing a bipolar junction transistor; doping a region in a collector of the transistor with a rare-earth element; and biasing the transistor to generate light emission from the rare-earth element doped region.

Optical frequency synthesizer using femtosecond laser light injection lock and optical frequency synthesizer method {Optical frequency synthesizing and random frequency synthesizing method for femtosecond functional injection locking}

L-Band Amplification With Detuned 980nm Pump

본 발명은 대신호 입력 파워를 갖는 증폭기에 광신호를 제공하는 단계; 및 광신호를 증폭하기 위해 기지의 펌프 흡수 밴드의 중심파장과 상이한 파장을 갖는 증폭기에 펌핑광을 제공하는 단계를 포함하는 기지의 펌프 흡수 밴드를 갖는 희토류 도프 이득매체 방출 스펙트럼의 장파장 스펙트럼 영역(L-밴드)에서 향상된 이득 및 펌프-대-신호 반전 효율을 위한 광증폭기 작동방법에 관한 것이다. 신호 이득 및 향상된 펌프-대-신호 반전 효율은 펌프 밴드 중심파장 979-980nm의 일측에 약 ±0-30nm 사이의 펌프를 이조시킨 에르븀 L-밴드 신호에 대해 설명되어 있다. 상술한 방법을 사용하는 광증폭기가 또한 개시되어 있다.

Coherent ultra-short ultraviolet or extended ultraviolet pulse generating systems

The present invention generally relates to coherent, ultra-short ultraviolet (UV) or extended ultraviolet (XUV) pulse generation, and more particularly, to a highly bright re-focusable source capable of producing, at an adjustable rate comprised between 50 kHz and a few megahertz, femtosecond long pulses, in the ultraviolet or extended ultraviolet range. It comprises: - a fiber laser device (10) adapted to produce laser beam comprising pulses,- - an harmonic generator device (20) comprising an interaction medium. The harmonic generator device (20) and the fiber laser device (10) are coupled so that the laser beam hits the interaction medium with a power of at least 10 13 W/cm2, so as to generate said UV-XUV pulses.

Multi-resonant fiber laser system

본 발명은 희토류 함유 광섬유와 유도 라만효과 광섬유로 구성된 다중 공진부를 포함하는 다중 공진 광섬유 레이저 시스템을 제공한다. 본 발명의 일실시예에 따른 다중 공진 광섬유 레이저 시스템은, 펌프 광을 발진하는 펌프 광원; 희토류 원소를 포함하는 제1 이득매질 광섬유, 및 상기 제1 이득매질 광섬유에 대하여 서로 대향하도록 배치된 제1 및 제2 반사부재들을 포함하고, 상기 제1 이득매질 광섬유를 이용하여 상기 펌프 광을 변환하여 제1 파장을 가지는 제1 레이저를 발진하는 제1 공진부; 및 유도 라만효과를 발생하는 제2 이득매질 광섬유, 및 상기 제2 이득매질 광섬유에 대하여 서로 대향하도록 배치된 제3 및 제4 반사부재들을 포함하고, 상기 제2 이득매질 광섬유를 이용하여 상기 제1 레이저를 변환하여 제2 파장을 가지는 제2 레이저를 발진하는 제2 공진부를 포함한다. The present invention provides a multi-resonant fiber laser system including a multi-resonance unit composed of a rare earth-containing optical fiber and an induced Raman effect optical fiber. Multi-resonant fiber laser system according to an embodiment of the present invention, the pump light source for oscillating the pump light; A first gain medium optical fiber comprising a rare earth element, and first and second reflecting members disposed to face each other with respect to the first gain medium optical fiber, and converting the pump light using the first gain medium optical fiber A first resonator configured to oscillate a first laser having a first wavelength; And a second gain medium optical fiber for generating an induced Raman effect, and third and fourth reflecting members disposed to face each other with respect to the second gain medium optical fiber, wherein the first gain medium optical fiber is used. And a second resonator configured to convert the laser to oscillate the second laser having the second wavelength. 광섬유 레이저, 다중 공진, 희토류, 유도 라만효과, 지방 Fiber laser, multiple resonance, rare earth, induced Raman effect, fat

Fiber laser arrangement

The present invention provides a system, which comprises a fiber laser ( 1 ) for generation of laser radiation, and an applicator ( 8 ) coupled with the fiber laser ( 1 ), the applicator ( 8 ) being adapted for delivery of laser radiation from the fiber laser ( 1 ) to an area of interest ( 22 ) and comprising an endoscopic fiber ( 7 ) or bare fiber ( 7 ).

Ultrashort Femtosecond Laser Apparatus For High-Brightness beam Comprising Polarizer

공간적으로 서로 수직방향의 Ng, Np, Nm축을 갖는 제 1 레이저 매질; 상기 제 1 레이저 매질의 Ng축에 실질적으로 평행한 Np축을 갖도록 배치된 제 2 레이저 매질; 및 상기 제 1 레이저 매질 및 상기 제 2 레이저 매질에 각각 인접하여 배치된 제 1 레이저 다이오드 및 제 2 레이저 다이오드 및 제 1 레이저 매질 및 제 2 레이저 매질로부터 발생된 레이저 빔이 증폭되어 다시 상기 제 1 레이저 매질에 입사되는 레이저 빔의 경로에 배치된 편광 변환기를 포함하고, 제 1 레이저 매질과 제 2 레이저 매질 각각은, 상기 제 1 레이저 매질의 Np축과 제 2 레이저 매질의 Nm축이 상기 편광 변환기에 의해 변경된 상기 레이저 빔의 편광방향에 평행하도록 배치되는 펨토초 레이저 장치를 제공한다.

To the fine scale time control of Materialbearbeitung mit Laserlicht

本发明公开了方法，所述方法包括将激光束以可变扫描速度沿着扫描路径引导到目标，以及在所述激光束沿着所述扫描路径的移动期间并相对于所述可变扫描速度来调节数字调制以便沿着所述扫描路径在所述目标处提供预定注量范围内的注量。一些方法包括使用变焦光束扩展器调节所述激光束的宽度。本发明公开了装置，所述装置包括激光源，所述激光源被定位成发射激光束；3D扫描器，所述3D扫描器被定位成接收所述激光束并且沿着扫描路径将所述激光束引导在所述目标处的扫描平面内；以及激光源数字调制器，所述激光源数字调制器耦合到所述激光源以便在所述激光束扫描速率沿着所述扫描路径改变时沿着所述扫描路径在所述扫描平面处产生预定注量范围内的注量。

Semiconductor lasers comprising rare earth metal-doped diamond

In general, the semiconductor laser device of the present invention comprises an emitting element comprising a doped diamond, which is doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal. The semiconductor laser device assembly according to the present invention comprises an emitting element of a doped diamond, which is a diamond doped with atoms of at least one rare earth metal and/or molecules of at least one compound containing a rare earth metal, and a thermal releasing element of a substantially undoped diamond, on which the semiconductor laser device are placed.

Laser amplification device

本发明所涉及的激光放大装置中的激光介质单元(10)具备多个激光介质(14)。在激光介质单元(10)的周围设置冷却介质流路(F1)，从外侧冷却激光介质单元(10)。在激光介质(14)之间的密闭空间内填充气体或者液体，通过所涉及的密闭空间内的激光因为不会被在外侧进行流动的冷却介质干涉，所以被放大的激光的晃动等被抑制并且激光的稳定性和聚焦特性等的质量提高。

Laser-amplifying device with active control of beam quality

The invention relates to a laser-amplifying device (200) comprising an amplifying slab (210) having an entrance lateral face and an exit lateral face (212) for a laser beam (300) to be amplified, and the upper and lower faces of which are each covered with a respective temperature-controlling system (230A, 230B). According to the invention, each temperature-controlling system (230A; 230B) comprises a cooling element (231A; 231B) covering a central region of the upper face and lower face of the amplifying slab, respectively, and at least one heating element (232A; 232B) covering peripheral regions of the upper face and lower face of the amplifying slab, respectively. The temperature-controlling systems (230A; 230B) are furthermore substantially reflectionally symmetric one with respect to the other about a plane (formula A) passing through the amplifying slab (210; 910). Said plane (formula A) is a plane parallel to the upper and lower faces of the amplifying slab (210; 910). The invention allows the optical quality of the laser beam to be amplified, propagating from the entrance lateral face to the exit lateral face, to be maintained via controlled action on the wave front associated with said beam.

Visible light-emitting material and visible light-emitting device

It is intended to provide a visible light-emitting material characterized by comprising at least one ion, which is a trivalent rare earth ion serving as the light emission center, selected from the group consisting of praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium and thulium (a first group) and a divalent rare earth ion selected from the group consisting of ytterbium or europium (a second group).

Electric pumping of rare earth doped silicon for optical emission

Optical electromagnetic wave amplifying concentrator

Laser processing method and apparatus

本发明公开了方法，所述方法包括将激光束以可变扫描速度沿着扫描路径引导到目标，以及在所述激光束沿着所述扫描路径的移动期间并相对于所述可变扫描速度来调节数字调制以便沿着所述扫描路径在所述目标处提供预定注量范围内的注量。一些方法包括使用变焦光束扩展器调节所述激光束的宽度。本发明公开了装置，所述装置包括激光源，所述激光源被定位成发射激光束；3D扫描器，所述3D扫描器被定位成接收所述激光束并且沿着扫描路径将所述激光束引导在所述目标处的扫描平面内；以及激光源数字调制器，所述激光源数字调制器耦合到所述激光源以便在所述激光束扫描速率沿着所述扫描路径改变时沿着所述扫描路径在所述扫描平面处产生预定注量范围内的注量。