ЛАЗЕРНЫЙ ПРИБОР

OPTICAL AMPLIFIER AND LASER

OPTICAL FIBRE AMPLIFIER

Glass for high and flat gain 1.55 mum optical amplifiers

OPTICAL FIBER FOR LIGHT AMPLIFIER

An optical fiber used for an optical amplifier, which is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr+3) and erbium ions (Er+3) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at both wavelengths of 1.3 .mu.m and 1.55 .mu.m. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to an optical amplifier formed of only Pr+3 or only Er+3.

광파이버, 및 이것을 이용한 레이저 발진기

The optical fiber 6 includes a first optical fiber main body 61, a second optical fiber main body 62, and a first end cap 63. The first optical fiber body 61 has a first core 611 and a first clad 612. The second optical fiber body 62 has a second core 621 and a second clad 622 and a first end face 623 is provided on the first end face 613 of the first optical fiber body 61 Respectively. The first end cap 63 is light-transmissive and is bonded to the second end face 624 of the second optical fiber body 62. The first core 611 is doped with a laser medium. The mass content rate of the laser medium in the second core 621 is lower than the mass content rate of the laser medium in the first core 611. [

WAVEGUIDE LASER

It is an object of the invention to provide a simple setup of a waveguide laser which allows to control the emission of specific laser wavelengths in a laser material having laser transitions of similar wavelengths. For this purpose a core (4) forming a gain medium is provided with a cladding (6) which introduces losses to an undesired laser transition but is transparent to the light of a desired laser transition. A second cladding (8) is provided for guiding the laser radiation. Pr: ZBLAN with a Tb: doped cladding may be used. Instead of the absorbing cladding (6) a photonic crystal (20) may be used. The laser is end-pumped by a laser diode (14).

Laser automotive lamp apparatus

A laser light source apparatus includes a laser diode, a first optical assembly having one or more lenses for generating a collimated laser beam from light emitted by the laser diode, a doped microstructured glass block configured to generate laser emissions at at least a first wavelength and a second wavelength when pumped by the collimated laser beam, an input beam lens for focusing the collimated laser beam onto an input surface of the microstructured glass block, an optical alignment assembly, an output light guiding assembly, and a housing for containing and supporting the optical alignment assembly and the output light guiding assembly.

Device for generating blue laser light

A device and a method of generating blue laser light having a wavelength of approximately 450 nm by means of an upconversion process, said device comprising a single semiconductor laser 1 which emits light having a wavelength of 640 to 700 nm, and a resonator cavity which comprises a glass composition of heavy metal fluorides, which glass composition contains trivalent thulium ions. The resonator cavity preferably consists of a glass fibre 5 having a core of a glass composition which consists of heavy-metal fluorides containing 0.01 to 1 mol% of thulium fluoride and a cladding with a lower refractive index than the core. The device is suitable for generating continuous blue laser light. ...

ОПТИЧЕСКОЕ ВОЛОКНО ДЛЯ ОПТИЧЕСКОГО УСИЛИТЕЛЯ

Оптическое волокно, используемое для оптического усилителя, которое формируется посредством легирования стекла ионами редкоземельных металлов. Ионы празеодимия (Pr+3) и ионы эрбия (Er+3) используются в качестве ионов редкоземельных металлов, и стекло является сульфидным стеклом системы Ge-As-Ga-S, Ge-Ga-S, Ge-As-S. Техническая задача изобретения - обеспечение возможности использования волокна на длинах волн 1,3 мкм и 1,55 мкм. Эффективность усиления света оптического усилителя, изготовленного из оптического волокна, можно увеличить по сравнению с оптическим усилителем, сформированным только из Pr+3 или только из Er+3 . 3 з.п.ф-лы, 6 ил.

HYBRIDER OPTISCHER VERSTÄRKER MIT VERBESSERTEM VERSTÄRKUNGSANSTIEG

Optische Faser für optische Verstärker

OPTICAL FIBRE AMPLIFIER AND LASER

Element for the amplification of a light and method of making the same

An element for the amplification of a light by stimulated emission of radiation comprising: a piece of glass with a tubular structure formed therein to guide light; the tubular structure has a boundary region of average refractive index less than that of a majority of the piece of glass; and a plurality of centres in the piece of glass that amplify the guided light, the amplification being by stimulated emission of radiation when the centres are illuminated by another light. Also contemplated is a method of manufacturing said element that comprises the step of: translating a focal point of an electromagnetic radiation relative to a piece of glass to form a tubular structure to guide light, that has a boundary region of average refractive index less than that of a majority of the piece of glass, determined, at least in part, by the interaction between the electromagnetic radiation and glass.

OPTICAL FIBER DEVICE

To prevent a bonding portion from reaching a high temperature in an optical fiber device that has a configuration wherein an optical fiber is bonded to the lateral surface of another optical fiber. This optical fiber device is provided with a first fluoride fiber (3), a second fluoride fiber (4) and a heat dissipation member (6). The first fluoride fiber (3) guides light. The second fluoride fiber (4) has a first end, on or from which light is incident or discharged, and a second end, the end face of which is bonded to the lateral surface of the first fluoride fiber (3) at an angle. The heat dissipation member (6) is arranged so as to cover the entire periphery of the bonded portion of the first fluoride fiber (3) and the second fluoride fiber (4), and has a thermal conductivity equal to or higher than that of the first and second fibers (3, 4), while exhibiting light transmissivity with respect to the light guided by the fibers.

OPTICAL AMPLIFIER WITH A DOPED FLUORIDE GLASS OPTICAL FIBRE AND PROCESS FOR PRODUCING SAID AMPLIFIER

Optical amplifier with a doped fluoride glass optical fibre and process for the production of said amplifier. In said amplifier, two monomode silica fibres (4a, 6a), whereof at least one is doped with erbium, are coupled to two ends of an erbium-doped, fluoride glass monomode fibre (2) and have the same optical mode diameter as the latter. Application to optical telecommunications.

OPTICAL FUNCTIONING GLASS AND APPARATUS USING THE SAME

AMPLIFIER AND PROCESS Of AMPLIFICATION Of an Optical signal

GLASS OF FLUOROPHOSPHATE DOPES WITH ERBIUM AND AMPLIFYING OPTICAL INCLUDING/UNDERSTANDING THIS GLASS

L'invention concerne une famille de verres de fluorophosphate dopés à l'erbium destinés à être utilisés pour l'amplification de signaux optiques et qui sont dopés pour 100 parties en poids constituées de : avec jusqu'à 10 parties en poids d'oxyde d'erbium. Les verres selon l'invention présentent un gain élevé et un spectre de gain très plat dans la largeur de bande de 1 550 nm. Ces verres peuvent être utilisés de manière particulièrement appropriée, notamment pour l'amplification optique à fibres ou planar en multiplexage de longueurs d'onde et dans des applications semblables.

MULTIPLE WAVELENGTH LASER LIGHT SOURCE USING FLUORESCENT FIBER, PREVENTING FLUORESCENT FIBER FROM BEING DAMAGED AND DETERIORATED

PURPOSE: A multiple wavelength laser light source using a fluorescent fiber is provided to obtain required blue light from light emitted from the fluorescent fiber. CONSTITUTION: A multiple wavelength laser light source using a fluorescent fiber includes a blue semiconductor laser device(2), and a fluorescent fiber(17). The blue semiconductor laser device(2) emits excitation light(a). The fluorescent fiber(17) has a first side fiber end surface and a second side fiber surface. The excitation light(a) emitted from the blue semiconductor laser device(2) is incident upon the first side fiber end surface, and is emitted through the second side fiber surface. The fluorescent fiber(17) has a color selecting mirror part forming a laser resonator(3) in the first and second side fiber end surfaces. A core of the fluorescent fiber(17) is made of a wavelength-converting unit including a low phonon glass containing at least a praseodymium ion as a trivalent rare-earth ion emitting wavelength conversion ...

Q-switching-induced gain-switched erbium pulse laser system

The present invention relates to a Q-switching-induced gain-switched erbium pulse laser system, capable of generating erbium laser pulses within the 2.5 m to 3.0 m wavelength region, by means of Q-switching operation at 1.6 m. At first, an Er3+-doped gain medium is pumped and Q-switched at the wavelength region from 1.58 m to 1.62 m, so that a Q-switched pulse is formed from the Er3+-doped gain medium. The Q-switched pulse results in an instant positive population inversion between the levels 4I11/2 and 4I13/2 of the Er3+-doped gain medium, followed by a gain-switched laser pulse at the wavelength region from 2.5 m to 3.0 m.

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.

BROADBAND LASER LAMP WITH REDUCED SPECKLE

OPTISCHER VERSTÄRKER UND LASER

Optischer Verstärker

MULTI-WAVELENGTH SOURCE

Optical fiber for light amplifier

LASER

OPTICAL FIBRE AMPLIFIER AND LASER

VOLTAGE-CONTROLLABLE LASER OUTPUT COUPLER FOR INTEGRATED PHOTONIC DEVICES

一种用于激光器的电压可控的输出耦合器，包括：液晶盒，该液晶盒响应于施加的电压提供双折射改变；以及，偏振器，该偏振器被相对于该液晶盒进行定向，以与该液晶盒共同形成用于该激光器的可变反射率镜；其中，该激光器的输出耦合能够通过按照切换间隔向液晶盒施加电压以将该可变反射率镜从高反射率切换到低反射率或将该可变反射率镜从低反射率切换到高反射率的方式进行控制，从而对该激光器进行主动调Q或腔倒空。

FIBEROPTIC DOPEE OUT OF RARE EARTHS PRESENTING OF WEAK INTERACTIONS BETWEEN THE DOPING ELEMENTS

Optical amplifier with fiberoptic out of fluorinated glass doped and manufactoring process of this amplifier

Amplificateur optique à fibre optique en verre fluoré dopé et procédé de fabrication de cet amplificateur. Pour réaliser cet amplificateur à fibre en verre fluoré, dopé de façon à amplifier un signal lumineux (S), on fabrique un multiplexeur optique (4) comportant, d'une part, deux fibres de silice (6, 8) et, d'autre part, une fibre en verre fluoré (2) dont au moins un tronçon est dopé et on réalise un couplage optique entre la fibre en verre fluoré et au moins une autre fibre en silice (12, 14). Application aux télécommunications optiques. Doped fluorinated glass fiber optic amplifier and method of manufacturing this amplifier. To produce this fluorinated glass fiber amplifier, doped so as to amplify a light signal (S), an optical multiplexer (4) is manufactured comprising, on the one hand, two silica fibers (6, 8) and, of on the other hand, a fluorinated glass fiber (2) of which at least one section is doped and an optical coupling is carried out between the fluorinated glass fiber and at least one other silica fiber (12, 14). Application to optical telecommunications.

SOURCE MULTIPLE WAVELENGTHS

Source de longueurs d'ondes multiples, notamment pour la communication optique à plusieurs canaux multiplexés en longueur d'onde, comprenant une source de lumière à large bande (2) couplée à des moyens de séparation de longueurs d'onde discrètes (3). Les moyens de séparation de longueurs d'onde (3) comprennent des réseaux de Bragg réfractifs en cascade (14, 15, 16, 17), chacun d'eux réfléchissant une desdites longueurs d'onde discrètes ( lambdan..., lambda3, lambda2, lambda1) vers une sortie de source (20).

Fluoride glass planar optical waveguides for integrated optics

Procédé de fabrication de guides d'ondes planaires en verres fluorés basé sur la déposition directe d'une couche de verre liquide sur un substrat de verre solide. Le verre liquide est amené à une température supérieure à la température de liquidus tandis que le substrat se trouve à un température voisine de celle de transition vitreuse. L'application est faite par trempage, centrifugation ou pulvérisation et la contamination de la surface du substrat doit être minimisée. Le procédé selon l'invention est destiné en particulier à l'optique intégrée.

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.

INFRARED TRANSMITTING OPTICAL FIBRE MATERIALS

An optical fibre amplifier is formed from glass doped with praseodymium. The glass may include one or more of cadmium mixed halide, hafnium halides, germanium and silicon disulphide based vitreous materials or fluorozirconate glass fibres. It is possible to provide an optical fibre amplifier which operates at a 1300 nm window for passive optical networks.

High-power red, orange, green, blue (ROGB) fiber lasers and applications thereof

An all-fiber device platform for producing high-power ROGB or RGB laser output comprises an optical fiber including multiple waveguide gain regions embedded within a common inner cladding and within an outer cladding, an optical cavity defined by dielectric reflectors and/or FBG mirrors, and a pump source for exciting one or more active ionic species by one or multiple pump wavelengths from one or both ends of the optical fiber through upconversion process. An apparatus for producing sequential or simultaneous multiple wavelength laser operation provides for applications of color projection displays and biomedical or other instrumentation.

Pumped CW laser with low dopant level laser medium

A 2.7Sg(m)m laser comprises a single mode fluoro-zirconate optical fibre doped with 0.086 mole % Er3+. C-W operation of the usually self-terminating lasing transition4 I11/2 to4 I13/2 is achieved by applying excitation energy to a suitable wavelength and intensity to elevate ions from the lower lasing level to maintain a population inversion between the upper and lower lasing levels during lasing. The laser may be pumped at a single wavelength of about 785 nm by a semiconductor laser.

ОПТИЧЕСКИ НАКАЧИВАЕМЫЙ СВЕТОВОДНЫЙ ЛАЗЕР С УЛУЧШЕННОЙ ЭФФЕКТИВНОСТЬЮ

1. Оптически накачиваемый световодный лазер, содержащий: ! световод с оптическим передающим слоем (3, 4) между двумя резонаторными зеркалами (6, 7) для формирования объемного резонатора, ! причем упомянутый передающий слой (3, 4) состоит из усиливающей среды, по меньшей мере, вдоль одного участка упомянутого световода, и, причем упомянутая усиливающая среда обеспечивает преобразование, повышающее или понижающее частоту падающего света накачки, ! причем первое из упомянутых резонаторных зеркал (6), по меньшей мере, частично прозрачно для света накачки, так, чтобы позволить торцевую накачку световодного лазера через первую торцевую поверхность (8) упомянутого световода, и ! причем ширина упомянутого передающего слоя (3, 4) между упомянутыми двумя резонаторными зеркалами (6, 7) уменьшается на первом участке световода от упомянутой первой торцевой поверхности (8) ко второй торцевой поверхности (9), ! отличающийся тем, что на первом участке передающий слой (3, 4) состоит из материала, отличающегося от усиливающей среды, и этот материал не поглощает свет накачки или имеет коэффициент поглощения для света накачки ниже такового для усиливающей среды. ! 2. Световодный лазер по п.1, ! отличающийся тем, что световодный лазер (2) присоединен к диодному лазеру или диодной лазерной линейке (1) для торцевой накачки световодного лазера (2) упомянутым диодным лазером или диодной лазерной линейкой (1). ! 3. Световодный лазер по п.2, ! отличающийся тем, что диодный лазер или диодный лазерная линейка (1) испускает свет накачки в ИК или синей области длин волн. ! 4. Световодный лазер по п.2, ! отличающийся тем, что упомянутая ширина упомянутого передающего слоя (3, 4

Multiwellenlängenquelle

OPTISCHES GLAS, OPTISCHER WELLENLEITER-VERSTÄRKER UND -LASER

Optical device for the emission and amplification of light in the range 1260 to 1340 NM with an active medium containing praseodymium

PROCEDURE FOR THE COMPENSATION OF THE DISPERSION OF FIBER LASERS ON FLUORIDE BASIS IN THE SECOND OPTICAL WINDOW

OPTICAL FIBER AND LASER OSCILLATOR USING SAME

This optical fiber (6) is provided with a first optical fiber main body (61), a second optical fiber main body (62) and a first end cap (63). The first optical fiber main body (61) has a first core (611) and a first cladding (612). The second optical fiber main body (62) has a second core (621) and a second cladding (622), and a first end face (623) of the second optical fiber main body (62) is joined to a first end face (613) of the first optical fiber main body (61). The first end cap (63) transmits light and is joined to a second end face (624) of the second optical fiber main body (62). The first core (611) is doped with a laser medium. The mass content of the laser medium in the second core (621) is lower than the mass content of the laser medium in the first core (611).

LASER AND AN AMPLIFIER

An 850 nm laser and/or amplifier comprises a single mode fluoro-zirconate optical fibre (20) doped with Er3+. CW operation of the normally self-terminating lasing transition 4S3/2 to 4I13/2 is achieved by applying excitation energy at 801 nm which both maintains a population inversion between the lasing levels and also populates the upper lasing level by a twostage process of excitation to the 4I9/2 level from the 4I15/2 ground state and then to 2H9/2 level by ESA.

SOURCE MULTIPLE WAVELENGTHS

INTEGRATED WAVEGUIDE LASER FOR LAB-ON-A-CHIP DIAGNOSTICS

The present invention relates to a detection device for detecting target substances in samples. The device comprises a substrate (1) with at least one planar waveguide laser (2) in or on said substrate (1), said waveguide laser (2) having a gain medium (5) for up-conversion or for down-conversion. A top layer (3) of said waveguide laser (2) forms at least part of a surface of said substrate (1) and allows formation of an evanescent wave in a sample contacting said surface. A structure is applied on said top layer (3) to define an array of probe regions (4) on said top layer (3), said probe regions (4) consisting of a coating of probe materials for sensing said target substances to be detected. The present detection device allows a parallel detection of target substances with a highly integrated design.

FLUOROTELLURITE, AMPLIFIER GLASSES

La présente invention concerne une famille de verres au fluorotellurite, dont la composition consiste principalement, en pourcentage molaire, en 30-75 % de TeO¿2, 15-60 % de ZnF¿2 et 0,005-10 % d'un oxyde d'erbium, de thulium ou d'holmium, ainsi que des composants optiques amplificateurs, produits à partir de ces verres.

Glasses for high efficiency erbium (3+) optical fiber lasers, amplifiers, and superluminescent sources

Glass compositions for high efficiency erbium3+ -doped optical fiber lasers, amplifiers and superluminescent sources are optimized for pumping by high power solid state lasers in the vicinity of 800 nm to provide amplified signals in wavelengths between 1.5 and 1.7 microns, a principal telecommunications window. A number of suitable host glasses for doping with erbium 3+ are identified wherein the excited state absorption/ground state absorption intensity ratio calculated at 800 nm is 1.00 or less.

Laser apparatus with all optical-fiber

A laser apparatus with all optical-fiber includes a plurality of pumping light sources in different wave bands and an optical-fiber laser system. The optical-fiber laser system includes an optical fiber at least doped with erbium (Er) element and doped with or not doped with ytterbium (Yb) element according to a need. The optical-fiber laser system outputs a laser light through the pumping light source.

Supercontinuum system with microstructured photonic crystal fibers based on fluoride glass

A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air-filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500 nm) from 140 fs, 1 nJ pulses at 1042 nm are disclosed.

Einrichtung zum Erzeugen von blauem Laserlicht.

DEVICE CONTAINING PRASEODYMIUM FOR EMISSION AND AMPLIFICATION OF LIGHT

A device comprises an active medium (3), e.g. fluoride glass containing Pr<3+> ions, and at least one excitation means (4) for producing light radiation which significantly excites the upper level of the <1>G4 to <3>H5 transition of the Pr<3+> ions of the active medium, the latter being chosen so as to obtain a high radiative quantum efficiency for the transition. The Pr<3+> may be excited by excitation of ytterbium. The device emits and/or amplifies light of about 1200 to 1400nm and may be operated incoherently, or coherently as a laser. The device may simultaneously amplify a plurality of light signals. The device may be used in fibre optic telecommunications. ...

Fluorotellurite, amplifier glasses

FLUOROZIRCONATE FIBER LASER

... 87-3-302 CN A FLUOROZIRCONATE FIBER OPTIC LASER : A laser has been made using a Nd3+ -doped fluorozirconate heavy metal fluoride (HMF) glass multimode fiber which lases in a range equal to or greater than 1.32 micrometers. The fiber laser was made by forming a glass fiber from a core glass composition comprising 52,8 mole % ZrF4, 19.9 mole % BaF2, 2.5 mole % LaF3, 3.0 mole % AlF3, 19.9 mole % NaF, 0.4 mole % InF3, and 1.5 mole % NdF3 the active dopant and the composition of the cladding glass comprises 39.6 mole % ZrF4, 17.9 mole % BaF2, 4.0 mole % LaF3, 3.0 mole % AlF3, 21.9 mole % NaF, 0.4 mole % InF3, and 13.2 mole % HfF4.

OPTICAL FIBER DEVICE

To prevent a bonding portion from reaching a high temperature in an optical fiber device that has a configuration wherein an optical fiber is bonded to the lateral surface of another optical fiber. This optical fiber device is provided with a first fluoride fiber (3), a second fluoride fiber (4) and a heat dissipation member (6). The first fluoride fiber (3) guides light. The second fluoride fiber (4) has a first end, on or from which light is incident or discharged, and a second end, the end face of which is bonded to the lateral surface of the first fluoride fiber (3) at an angle. The heat dissipation member (6) is arranged so as to cover the entire periphery of the bonded portion of the first fluoride fiber (3) and the second fluoride fiber (4), and has a thermal conductivity equal to or higher than that of the first and second fibers (3, 4), while exhibiting light transmissivity with respect to the light guided by the fibers.

Dispositif optique, pour l'émission et l'amplification de lumière dans la gamme 1260-1234NM, à milieu actif contenant du praséodyme.

Ce dispositif comprend un milieu actif (3) contenant des ions Pr3 + et au moins un moyen d'excitation (4) prévu pour engendrer un rayonnement lumineux qui excite de façon importante le niveau superieur de la transition 1 G4 vers 3 H5 des ions Pr3 + du milieu actif, ce dernier étant choisi de façon à obtenir un rendement quantique radiatif important pour ladite transition. Application aux télécommunications par fibres optiques.

GLASS OF FLUOROPHOSPHATE DOPES WITH ERBIUM AND AMPLIFYING OPTICAL INCLUDING/UNDERSTANDING THIS GLASS

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 colour centres, a reduced re-absorption of the laser radiation and the emission of laser light in the range of visible wavelengths.

Method of manufacture of an optical waveguide article including a fluorine-containing zone

A method for manufacturing an optical article including the steps of providing a substrate tube; forming one or more cladding layers inside the substrate tube, the one or more cladding layers including an innermost cladding layer; forming a concentric fluorine reservoir adjacent to the innermost cladding layer; and forming a core adjacent to the fluorine reservoir and concentric with the one or more outer cladding layers. The fluorine concentration in the fluorine reservoir is higher than the fluorine concentration in either the core or the innermost cladding layer.

OPTICALLY PUMPED WAVEGUIDE LASER WITH A TAPERED WAVEGUIDE SECTION

The present invention relates to an optically pumped waveguide laser (2) comprising a waveguide with an optical propagation layer (3, 4) and two resonator mirrors (6, 7) . The propagation layer (3, 4) consists of a gain medium at least along a section of said waveguide, said gain medium allowing up-conversion or down- conversion of incident pump light. One of the resonator mirrors is at least partially transparent to the pump light so as to allow end-pumping of the waveguide laser through a first end face (8) of the waveguide. The propagation layer (3, 4) has a geometrical width which is reduced in a first section of the waveguide, starting from the first end face (8) towards a second end face (9), thereby increasing an energy density of the incident pump light when propagating in the first section towards the second end face (9). In the proposed waveguide laser, the pump light is concentrated in the first section of the waveguide, resulting in a higher energy density which lowers the laser ...

GLASS FOR HIGH AND FLAT GAIN 1.55 μm OPTICAL AMPLIFIERS

The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.

LASER AUTOMOTIVE LAMP APPARATUS

A laser light source apparatus includes a laser diode, a first optical assembly having one or more lenses for generating a collimated laser beam from light emitted by the laser diode, a doped microstructured glass block configured to generate laser emissions at at least a first wavelength and a second wavelength when pumped by the collimated laser beam, an input beam lens for focusing the collimated laser beam onto an input surface of the microstructured glass block, an optical alignment assembly, an output light guiding assembly, and a housing for containing and supporting the optical alignment assembly and the output light guiding assembly. 115-. (canceled)16. A laser light source apparatus , comprising:a laser diode;a first optical assembly comprising one or more lenses for generating a collimated laser beam from light emitted by the laser diode;a doped microstructured glass block configured to generate laser emissions at at least a first wavelength and a second wavelength when pumped by the collimated laser beam;an input beam lens for focusing the collimated laser beam onto an input surface of the microstructured glass block; a laser diode housing for mounting and aligning the laser diode and the first optical assembly; and', 'a microstructured glass block mounting configured to mount and align the input beam lens and the microstructured glass block;, 'an optical alignment assembly comprisingan output light guiding assembly comprising at least one lens for collimating output light from an output surface of the microstructured glass block into an output beam; anda housing for containing and supporting the optical alignment assembly and the output light guiding assembly,wherein the laser diode housing is configured to dissipate heat from the laser diode and is constructed of a material that is thermally stable and has high thermal conductivity to maintain laser diode output within a predetermined acceptable output range, andthe microstructured glass block ...

Optical amplifier and gain tilt compensation method

The optical amplifier realizes EDFA amplification of optical signals in new bands (the S + - and S-bands), at wavelengths of 1450 to 1530 nm. The amplifier uses multiple erbium-doped fibers to amplify optical signals at wavelengths of 1450 to 1530 nm. Each of the multiple optical filters is interposed between the individual erbium-doped fibers. The sum of the transmission characteristics of the multiple filters is identical to an inverted EDF wavelength gain characteristic at wavelengths of 1450 to 1530 nm which is then shifted to the direction that the transmission increases.

Laser oscillation method and device and laser scalpel

A laser oscillation device, which has an optical fiber where laser ion is doped; an excitation emission element that generates one laser beam including multiple wavelength components by exciting the laser ion in the optical fiber by light emission; a total reflection element that is located at one end of the optical fiber and reflects uniformly laser beam with multiple wavelengths; a separation optical element that is located at another end of the optical fiber and separates laser beam into beams with multiple wavelengths; and a plurality of partial reflection element that reflect separately laser beams with multiple wavelengths separated by the separation optical element.

Rare earth ion doped CW cascade fiber laser

A continuous wave(CW) activator ion doped fiber laser is presented which lases at a normally self-terminating laser transition at a slope efficiency greater than that achieved by a self-terminating fiber laser. Two laser transitions, one corresponding to a self-terminating laser transition and the other to a transition out of the lower level of the self-terminating transition, are simultaneously stimulated in the activator ion doped fiber. Through simultaneous lasing of the two wavelengths corresponding to these transitions, the lower level of the self-terminating transition is sufficiently depopulated so that CW operation is achieved.

An optical plural-comb generator, a method of generating an optical plural comb, and a plurality of mode locked lasers that are mechanically coupled and optically independent

Disclosed herein is an optical plural-comb generator (10). The optical plural-comb generator (10) comprises a plurality of mode-locked lasers (12,14) that are mechanically coupled and optically independent. The optical plural-comb generator comprises an optical combiner (15) optically coupled to an output of each of the plurality of mode-locked lasers (12, 14) for combining a plurality of optical combs (20, 22) when generated by the plurality of mode-locked lasers (12,14).

A laser and an amplifier

Hybrid optical amplifier having improved gain tilt

MULTIWAVELENGTH LIGHT WAVE SOURCE

Source de longueurs d'ondes multiples, notamment pour la communication optique à plusieurs canaux multiplexés en longueur d'onde, comprenant une source de lumière à large bande (2) couplée à des moyens de séparation de longueurs d'onde discrètes (3). Les moyens de séparation de longueurs d'onde (3) comprennent des réseaux de Bragg réfractifs en cascade (14, 15, 16, 17), chacun d'eux réfléchissant une desdites longueurs d'onde discrètes (.lambda.n...,.lambda.3,.lambda.2,.lambda.1) vers une sortie de source (20).

OPTICAL AMPLIFIER AND LASER

A laser has a resonant cavity defined by a pair of mirros (3, 5) butted to respective ends of a fluorozirconate optical fibre (1). The fibre (1) has a numerical aperture of 0.205 and an LP11 mode cut-off of about 2.0.mu.m. The fibre (1) is co-doped with thulium ions to a concentration of about 0.1%, and with terbium ions to a concentration of about 1 %. An optical pump source (6) provides a pump signal at 775 nm which excites the thulium ions into the 1G4, energy level to provide lasing at about 475 nm. The pump source is preferably a high power semiconductor laser (16).

TWO-DIMENSIONAL SEMICONDUCTOR SATURABLE ABSORBER MIRROR AND FABRICATION METHOD, AND PULSE FIBER LASER

A two-dimensional semiconductor saturable absorber mirror comprises an optical fiber, a two-dimensional semiconductor thin film attached to an end surface of the optical fiber, and a gold film attached to the two-dimensional semiconductor thin film. A method for fabricating the two-dimensional semiconductor saturable absorber mirror comprises the following steps: cutting the optical fiber, putting the cut optical fiber and a two-dimensional semiconductor target into a vacuum chamber, ionizing a surface of two-dimensional semiconductor target to generate two-dimensional semiconductor plasma, depositing the two-dimensional semiconductor plasma on an exposed end surface of the optical fiber to form the two-dimensional semiconductor thin film, and by controlling deposition time and/or deposition temperature, ensuring the two-dimensional semiconductor thin film to be a desired thickness; and plating the gold film on the resulting two-dimensional semi-conductor thin film.

Infrared transmitting optical fiber materials

An optical fiber amplifier is formed from glass doped with praseodymium. The glass may include one or more of cadmium mixed halide, hafnium halides, geranium and silicon disulphide based vitreous materials or fluorozirconate glass fibers. It is possible to provide an optical fiber amplifier which operates at a 1300 nm window for passive optical networks ...

Optische Faser für optische Verstärker

PRASEODYMDOTIERTE WELLENLEITERLASER

OPTICAL FUNCTIONING GLASS AND APPARATUS USING THE SAME

An optical functioning glass for enabling optical amplification at 1.3-.mu.m wavelength band or increasing efficiency of the amplification is disclosed. The optical functioning glass contains Nd3+ as an active material and uranium, both of which are doped in a multi-component function glass serving as a host glass. Since uranium is doped in the optical functioning glass, light emission of Nd3+ in the 1.06-.mu.m wavelength band can be absorbed by uranium. A decrease in efficiency of induced emission in a 1.3-.mu.m wavelength band can be prevented, and an optical functioning glass suitable for optical amplification in the 1.3-.mu.m wavelength band can be obtained. When a fiber is formed using the optical functioning glass as a core, a low-threshold, high-gain fiber amplifier, fiber laser, and the like can be obtained.

OPTICAL FIBRE AMPLIFIER AND LASER

An optical fire amplifier comprises a thulium-doped optical fibre (2) pumped at 790 nm by a semi-conductor diode laser (20) coupled to the fibre (2) via optical fibre coupler (12). The amplifier (2) is optically coupled in series to a pair of systems fibres (18 and 14) to provide amplification to optical signals.

RARE EARTH DOPED OXYHALIDE LASER GLASS

The oxyhalide rare earth doped laser glass of the present invention comprises the substitution of fluorine for oxygen in glasses having the general molar batch composition of 50% SiO2, 25% CaO, 25% Al2O3 to improve the distribution of rare earth dopants in the glass. The general molar batch composition of the invention ranges from approximately 45-70% SiO2, 15-35% CaO, 10-25% Al2O3, 4-15% Al2F6, and .001-2% Er2O3 . This substitution of fluorine into the 2SiO2~Al2O3~CaO glass system provides erbium doped laser glasses having a Er2O3 batch content of .01 mole% Er2O3 to 1.2 mole% Er2O3 (500 ppm Er2O3 to 5.68 wt.% Er2O3) which show little to no concentration quenching and exhibit useful fluorescence lifetimes of approximately 6 milliseconds (ms) or greater.

MID-INFRARED OPTICAL FIBERS WITH ENHANCED OH-DIFFUSION RESISTANCE

34 ABSTRACT Mid-infrared-transparent optical fiber products with enhanced resistance to OH diffusion are disclosed, which may be used fiber laser oscillator and amplifiers systems. In one embodiment, an optical fiber product may include optical fiber configured for propagation of mid-infrared radiation toward a light-radiating endface of or coupled to the optical fiber, and a diffusion barrier disposed on the light-radiating endface and configured for allowing the mid-infrared radiation emanating from the light-radiating endface to pass therethrough and for preventing OH diffusion therethrough toward the light-radiating endface. In another embodiment, an optical fiber product may include an optical fiber for propagation of mid-infrared radiation and an endcap coupled to the optical fiber for receiving therefrom the mid-infrared radiation and radiating out the mid-infrared radiation, the endcap being made of an endcap material that has no or a low amount of fluoride and that is less permeable to OH diffusion than the fiber-optic material. Date Recue/Date Received 2020-07-02

OPTICAL FIBER FOR LIGHT AMPLIFIER

An optical fiber used for an optical amplifier, which is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr+3) and erbium ions (Er+3) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at both wavelengths of 1.3 .mu.m and 1.55 .mu.m. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to an optical amplifier formed of only Pr+3 or only Er+3.

OPTICAL FIBER AND LASER OSCILLATOR USING SAME

This optical fiber (6) is provided with a first optical fiber main body (61), a second optical fiber main body (62) and a first end cap (63). The first optical fiber main body (61) has a first core (611) and a first cladding (612). The second optical fiber main body (62) has a second core (621) and a second cladding (622), and a first end face (623) of the second optical fiber main body (62) is joined to a first end face (613) of the first optical fiber main body (61). The first end cap (63) transmits light and is joined to a second end face (624) of the second optical fiber main body (62). The first core (611) is doped with a laser medium. The mass content of the laser medium in the second core (621) is lower than the mass content of the laser medium in the first core (611).

OPTICAL DEVICE, FOR THE TRANSMISSION AND AMPLIFICATION OF LIGHT 1260-1234NM, MEDIUM ACTIVE CIRCUITS.

Optical amplifier with fiberoptic out of fluorinated glass doped and manufactoring process of this amplifier

Dans cet amplificateur, deux fibres monomodes en silice (4a, 6a), dont l'une au moins est dopée à l'erbium, sont couplées aux deux extrémités d'une fibre monomode (2) en verre fluoré dopé à l'erbium et ont le même diamètre de mode optique que celle-ci. Application aux télécommunications optiques. In this amplifier, two single-mode silica fibers (4a, 6a), at least one of which is doped with erbium, are coupled to both ends of a single-mode fiber (2) made of fluorinated glass doped with erbium and have the same optical mode diameter as this one. Application to optical telecommunications.

PUMPED CW LASER WITH LOW DOPANT LEVEL LASER MEDIUM

Optical amplifier and gain tilt compensation method

The optical amplifier (56A through 56D) realizes EDFA amplification of optical signals in new bands (the S+- and S-bands), at wavelengths of 1450 to 1530 nm. The amplifier (56A through 56D) uses multiple erbium-doped fibers (1) to amplify optical signals at wavelengths of 1450 to 1530 nm. Each of the multiple optical filters (2) is interposed between the individual erbium-doped fibers (1). The sum of the transmission characteristics of the multiple filters (2) is identical to an inverted EDF wavelength gain characteristic at wavelengths of 1450 to 1530 nm which is then shifted to the direction that the transmission increases.

An optical fiber doped with rare earth ions

A core of a fluorozirconate optical fiber is doped with rare earth ions, namely trivalent Dy ions. The Dy ion makes an absorption transition with excitation light generated by an 800 nm semiconductor laser module. Then the Dy ion undergoes transitions, namely a nonradiative transition involving phonon emission, a transition to a metastable excited level, and a radiative transition wherein radiation corresponding to the 1.28 µm to 1.35 µmrange occurs, thereafter returning to its ground state level. The Dy ion having an electrovalence of three can be pumped with a high-output 800 nm semiconductor laser module and is not subject to saturation at a lower energy level of population inversion. Using an optical fiber of the invention, a higher gain is obtained in the region of 1.3 µm telecommunications window. ...

Optischer Verstärker

Glass

Optical glass, optical waveguide amplifier and optical waveguide laser

MID-INFRARED LASER SYSTEM, MID-INFRARED OPTICAL AMPLIFIER, AND METHOD OF OPERATING A MID-INFRARED LASER SYSTEM

The mid-infrared laser system has an amplifier including at least one pump laser adapted to generate a pump laser beam and a length of fiber made of a low phonon energy glass and having at least one laser-active doped region between a first end and a second end, and a seed laser to generate a seed laser beam having a seed optical spectrum in the mid-infrared. The seed laser beam is launched into the first end to generate a mid-infrared laser beam outputted from the second end via stimulated emission upon pumping of the at least one laser-active doped region with the pump laser beam. When the power of the pump laser exceeds a spectrum modification threshold, the mid-infrared laser beam has an output optical spectrum being broadened relative to the seed optical spectrum.

SUPERCONTINUUM SYSTEM WITH MICROSTRUCTURED PHOTONIC CRYSTAL FIBERS BASED ON FLUORIDE GLASS

A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air- filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500nm) from 140fs, 1nJ pulses at 1042nm are disclosed.

OPTICAL AMPLIFIER HAVING A DOPED FLUORIDE GLASS OPTICAL FIBRE AND PROCESS FOR PRODUCING THIS AMPLIFIER

DESCRIPTIVE ABSTRACT Optical amplifier having a doped fluoride glass optical fibre and process for the production of this amplifier. For producing said fluoride glass fibre amplifier doped in such a way as to amplify a light signal (S), an optical multiplexer (4) is produced having on the one hand two silica fibres (6, 8) and on the other a fluoride glass fibre (2), whereof at least one section is doped and an optical coupling is brought about between the fluoride glass fibre and at least one other silica fibre (12, 14). Application to optical telecommunications. (Fig. 1)

METHOD OF COMPENSATING THE DISPERSION OF FLUORIDE-BASED FIBRE LASERS IN THE SECOND OPTICAL WINDOW

The invention concerns a method of manipulating a compensation fibre such that it can compensate the high negative dispersion of a fibre laser in the second optical window. According to the invention, the active fibre of the fibre laser is linked to a compensation fibre which consists of a step-index quartz glass core with a sheathing. By doping the compensation fibre sheathing with fluorine in a targeted manner, a positive value is set for the dispersion of the compensation fibre. Subsequent dimensioning of the length of the compensation fibre increases the set dispersion value to the positive dispersion value necessary for complete compensation of the dispersion of the fibre laser.

GLASS FOR HIGH AND FLAT GAIN 1.55 .MU.M OPTICAL AMPLIFIERS

The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.

Optical fiber for light amplifier

Glass-ceramic materials particularly for lasers and optical amplifiers doped rare-earth element and method of making such materials.

AMPLIFIER AND PROCESS Of AMPLIFICATION Of an Optical signal

Amplificateur et procédé d'amplification d'un signal optique. Pour amplifier un signal optique on réalise un amplificateur comportant une fibre optique du type fluoré, mais dopée à l'erbium et co-dopée à l'ytterbium. Pour éviter alors les phénomènes d'émission stimulée due à la forte durée de vie des atomes d'erbium dans l'état excité contenu dans ce type de fibres, on excite la fibre avec une source laser dont la longueur d'onde est comprise dans une gamme correspondant à une transition d'énergie de l'atome co-dopant. Cette longueur d'onde est cependant extérieure à une gamme d'énergie de l'atome d'erbium. Les deux gammes d'énergie coopèrent. On montre qu'en agissant ainsi, on évite le problème de désexcitation stimulée tout en s'affranchissant de la lenteur relative de la transition des atomes d'erbium de l'état excité l11/2 à l'état excité l13/2.

HIGH-POWER CW FIBER-LASER

A CW fiber- laser includes a gain fiber having a reflector proximity- coupled to one end, with the other end left uncoated. A laser resonator is defined by the reflector and the uncoated end of the gain-fiber. Pump-radiation from two fast-axis diode-laser bar stacks is combined and focused into the uncoated end of the gain-fiber for energizing the fiber. Laser radiation resulting from the energizing is delivered from the uncoated end of the gain-fiber and separated from the pump-radiation by a dichroic mirror.

Broadband Emission Material and White Light Emission Material

A broadband emission material according to the present invention includes: a fluoride glass containing 20 to 45 mol % of AlF, 25 to 63 mol % of alkaline-earth fluorides in total and 3 to 25 mol % of at least one fluoride of element selected from the group consisting of Y, La, Gd and Lu; and ytterbium ions incorporated in the fluoride glass as divalent rare-earth ions so as to serve as a luminescent center, wherein the fluoride glass includes 1 to 15 mol % of at least one halide of element selected from the group consisting of Al, Ba, Sr, Ca and Mg and element selected from the group consisting of Cl, Br and I; and wherein the alkaline-earth fluorides includes 0 to 15 mol % of MgF, 7 to 25 mol % of CaF, 0 to 22 mol % of SrFand 0 to 5 mol % of BaF. 1. A broadband emission material comprising:{'sub': '3', 'a fluoride glass containing 20 to 45 mol % of AlF, 25 to 63 mol % of alkaline-earth fluorides in total and 3 to 25 mol % of at least one fluoride of element selected from the group consisting of Y, La, Gd and Lu; and'}ytterbium ions incorporated in the fluoride glass as divalent rare-earth ions so as to serve as a luminescent center,wherein the fluoride glass includes 1 to 15 mol % of at least one halide of element selected from the group consisting of Al, Ba, Sr, Ca and Mg and element selected from the group consisting of Cl, Br and I; and{'sub': 2', '2', '2', '2, 'wherein the alkaline-earth fluorides includes 0 to 15 mol % of MgF, 7 to 25 mol % of CaF, 0 to 22 mol % of SrFand 0 to 5 mol % of BaF.'}2. The broadband emission material according to claim 1 , wherein the total amount of a phosphorus compound in the fluoride glass is 1 mol % or less.3. A composite luminescent material comprising: an encapsulant material; and the broadband emission material according to being dispersed in the encapsulant material.4. An optical waveguide comprising the broadband emission material according to as a core.5. A white light emission material comprising: the broadband emission ...

Laser apparatus

A laser apparatus includes: a laser oscillator that includes a mirror and emits a laser beam; and an external resonator that includes a nonlinear optical crystal that functions as a phase conjugate mirror. The phase conjugate mirror reflects the laser beam and produces a phase conjugate wave that reaches the mirror of the laser oscillator, and the mirror of the laser oscillator and the phase conjugate mirror cause laser oscillation such that a wavelength and a phase of the laser beam oscillated by the laser oscillation are automatically fixed.

Supercontinuum system with microstructured photonic crystal fibers based on fluoride glass

A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air-filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500 nm) from 140 fs, 1 nJ pulses at 1042 nm are disclosed.

Voltage-controllable laser output coupler for integrated photonic devices

A voltage-controllable output coupler for a laser, comprising: a liquid crystal cell that provides a change in birefringence in response to an applied voltage; and a polariser oriented with respect to the liquid crystal cell to collectively form a variable reflectance mirror for the laser; wherein output coupling of the laser is controllable by applying voltage to the liquid crystal cell for a switching interval to switch the variable reflectance mirror from high reflectance to low reflectance, and vice versa, thus actively Q-switching or cavity dumping the laser.

Glass

The present invention relates to a dysprosium-doped tellurite or germanate glass characterised by a fluorescence peak in the mid-IR spectrum.

RARE EARTH-DOPED MULTICOMPONENT FLUOROSILICATE OPTICAL FIBER FOR OPTICAL DEVICES

A rare earth-doped optical fiber comprises a fluorosilicate core surrounded by a silica cladding, where the fluorosilicate core comprises an alkaline-earth fluoro-alumino-silicate glass, such as a strontium fluoro-alumino-silicate glass. The rare earth-doped optical fiber may be useful as a high-power fiber laser and/or fiber amplifier. A method of making a rare earth-doped optical fiber comprises: inserting a powder mixture comprising YbF, SrF, and AlOinto a silica tube; after inserting the powder mixture, heating the silica tube to a temperature of at least about ° C., some or all of the powder mixture undergoing melting; drawing the silica tube to obtain a reduced-diameter fiber; and cooling the reduced-diameter fiber. Thus, a rare earth-doped optical fiber comprising a fluorosilicate core surrounded by a silica cladding is formed. 1. A rare earth-doped optical fiber comprising:a fluorosilicate core surrounded by a silica cladding, the fluorosilicate core comprising an alkaline-earth fluoro-alumino-silicate glass.2. The rare earth-doped optical fiber of comprising a dopant selected from the group consisting of: ytterbium claim 1 , erbium claim 1 , neodymium claim 1 , thulium claim 1 , praseodymium claim 1 , and holmium claim 1 , andwherein the alkaline-earth fluoro-alumino-silicate glass comprises at least one alkaline earth metal selected from the group consisting of: strontium, calcium, barium, magnesium, and beryllium.3. The rare earth-doped optical fiber of being a ytterbium-doped optical fiber comprising ytterbium as a dopant claim 1 , andwherein the alkaline-earth fluoro-alumino-silicate glass comprises a strontium fluoro-alumino-silicate glass.4. The rare earth-doped optical fiber of claim 1 , wherein the fluorosilicate core comprises on average a nonzero amount of silicon up to about 35 at. % claim 1 , a nonzero amount of fluorine up to about 10 at. % claim 1 , a nonzero amount of strontium up to about 8 at. % claim 1 , a nonzero amount of aluminum up to ...

WGM-based molecular sensors

The present invention concerns an optical molecular sensing device and related method. The optical molecular sensing device has an optical resonator adapted to be connected to an excitation source. The excitation source may be a laser operating at a 2.7-2.8 um spectral range. The optical molecular sensing device has an emission spectrum comprised of a plurality wavelengths. Also included are a detection unit and a RF frequency counter to detect at least one RF beat note resulting from detecting the emission spectrum of the optical resonator. A change in frequency of the RF beat note indicates the presence of a target molecule.

Broadband emission material and white light emission material

본 발명의 광대역 발광 재료는 AlF 3 를 20~45 몰%, 알칼리토류 불화물을 합계로 25~63 몰%, Y, La, Gd 및 Lu로 이루어진 군으로부터 선택되는 1종 이상의 원소의 불화물을 합계로 3~25 몰% 함유하는 불화물 유리에 발광 중심이 되는 2가 희토류 이온으로서 이테르븀 이온을 함유하고, 상기 불화물 유리는 Al, Ba, Sr, Ca 및 Mg로 이루어진 군으로부터 선택되는 1종 이상과 Cl, Br 및 I로 이루어진 군으로부터 선택되는 1종 이상으로 이루어지는 할로겐화물을 1~15 몰% 함유하며, 상기 알칼리토류 불화물은 MgF 2 를 0~15 몰%, CaF 2 를 7~25 몰%, SrF 2 를 0~22 몰% 및 BaF 2 를 0~5 몰% 함유하는 것을 특징으로 한다.

Fiber laser apparatus

A fiber laser apparatus includes: a short-length type fiber to which an active element is added and that has a length of 300 mm or less: a ferrule attached to an end of the fiber; and a housing that accommodates the fiber and supports the fiber with the ferrule. Each of the housing and the ferrule is composed of a material having a first thermal expansion coefficient that is equal to or have a predetermined difference from a second thermal expansion coefficient of a raw material of the fiber. The predetermined difference between the first and second thermal expansion coefficients is within −8.6×10−6 to 11.4×10−6/K.

Broadband emission material and white light emission material

本发明的宽频带发光材料的特征在于，在氟化物玻璃中含有镱离子作为用作发光中心的二价稀土离子，所述氟化物玻璃含有20～45摩尔％的AlF 3 、总计为25～63摩尔％的碱土金属氟化物、总计为3～25摩尔％的选自由Y、La、Gd和Lu组成的组中的至少1种元素的氟化物，该氟化物玻璃含有：1～15摩尔％的包含选自由Al、Ba、Sr、Ca和Mg组成的组中的至少1种和选自由Cl、Br和I组成的组中的至少1种的卤化物，该碱土金属氟化物含有0～15摩尔％的MgF 2 、7～25摩尔％的CaF 2 、0～22摩尔％的SrF 2 和0～5摩尔％的BaF 2 。

Fluorotellurite, amplifier glasses

A family of fluorotellurite glasses, the composition of which consist essentially of, as calculated in mole percent, 30-75 % TeO2, 15-60 % ZnF2 and 0.005-10 % of an oxide of erbium, thulium or holmium, and amplifying optical components produced from these glasses.

Optical glass, optical waveguide amplifier and optical waveguide laser

Neodymium-doped fluoroaluminate optical glass has a composition: 35 to 45 mol% AlF3; 5 to 30 mol% RF2, where R is selected from the group consisting of Ca, Mg, Sr and Ba; 5 to 25 mol% MF, where M is selected from the group consisting of Na, Li, K and Rb; and 0.001 to 10 mol% NdF3 dopant.

Fluorotellurite, amplifier glasses

A family of fluorotellurite glasses, the composition of which consist essentially of, as calculated in mole percent, 30-75 % TeO2, 15-60 % ZnF2 and 0.005-10 % of an oxide of erbium, thulium or holmium, and amplifying optical components produced from these glasses.

Optical amplification at the 1.31 wavelength

An optical amplifier operating at the 1.31 μm wavelength for use in such applications as telecommunications, cable television, and computer systems. An optical fiber or other waveguide device is doped with both Tm 3+ and Pr 3+ ions. When pumped by a diode laser operating at a wavelength of 785 nm, energy is transferred from the Tm 3+ ions to the Pr 3+ ions, causing the Pr 3+ ions to amplify at a wavelength of 1.31

Optically pumped waveguide laser with a tapered waveguide section

本发明涉及一种光泵浦波导激光器(2)，这种光泵浦波导激光器(2)包括波导，这种波导带有光学传播层(3、4)和两个谐振器镜(6、7)。这种传播层(3、4)包括至少沿着波导的节段的增益介质，这种增益介质允许入射泵浦光的上变换或下变换。这种泵浦光至少部分地透过锥形谐振器镜中的至少一个，以允许这种波导激光器穿过波导的第一端面(8)的端面泵浦。传播层(3、4)的几何厚度在波导的第一节段中减小，这种波导的第一节段从第一端面(8)开始到第二端面(9)，从而在朝向第二端面(9)在第一节段中传播时增加入射泵浦光的能量密度。在所提出的波导激光器中，将泵浦光聚集在波导的第一节段中，从而导致更高的能量密度，这种更高的能量密度降低了激光阈值并提高了效率。这种传播层(3、4)由折射指数低于传播层(3、4)的材料的折射指数的覆层(5)包围。

Optically pumped waveguide laser with improved efficiency

GLASS FOR HIGH AND FLAT GAIN 1.55 $g(m)m OPTICAL AMPLIFIERS

The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.

Optically active glass and device using it

Waveguide laser

It is an object of the invention to provide a simple setup of a waveguide laser which allows to control the emission of specific laser wavelengths in a laser material having laser transitions of similar wavelengths. For this purpose a core ( 4 ) forming a gain medium is provided with a cladding ( 6 ) which introduces losses to an undesired laser transition but is transparent to the light of a desired laser transition. A second cladding ( 8 ) is provided for guiding the laser radiation. Pr: ZBLAN with a Tb: doped cladding may be used. Instead of the absorbing cladding ( 6 ) a photonic crystal ( 20 ) may be used. The laser is end-pumped by a laser diode ( 14 ).

Optical functioning glass and apparatus using the same

Method and device for optical signal amplification

The amplifier has a fluorescent type erbium doped optical fiber co-doped with ytterbium having transition radiating energy level. The fiber is excited with a wavelength corresponding to the energy level transition of the co-dopant. The structure uses the relative speed of transition of erbium atoms to prevent the problem of non-stimulation.

Multiple wavelength laser light source using fluorescent fiber

본 발명에 따른 형광 섬유를 사용한 다중 파장 레이저 광원은 여기 광(a)을 방사하는 청색 반도체 레이저 소자(2) 그리고 제1 측면 섬유 단부 표면 및 제2 측면 섬유 표면을 갖는 광 섬유(17)를 포함하며, 청색 반도체 레이저 소자(2)로부터의 여기 광(a)은 제1 측면 섬유 단부 표면에 입사하게 되고, 제1 측면 섬유 단부 표면에 이와 같이 입사하게 되는 여기 광(a)은 제2 측면 섬유 표면을 통해 방사되며, 여기에서 광 섬유(17)는 각각 그 제1 및 제2 측면 섬유 단부 표면 내에서 레이저 공진기(3)를 구성하는 색 선별 거울 부분을 가지며 광 섬유(17)의 코어는 여기 광(a)에 의해 여기됨으로써 파장 변환 광을 방사하는 3가의 희토류 이온으로서 적어도 프라세오디뮴 이온을 내부에 함유하는 저 포논 유리를 포함하는 파장-변환 부재로 제조된다. 형광 섬유, 다중 파장 레이저 광원, 청색 반도체 레이저 소자, 광 섬유, 색 선별 거울 부분, 프라세오디뮴 이온

DOPED OPTICAL FIBER IN RARE EARTHS HAVING LOW INTERACTIONS BETWEEN THE DOPING ELEMENTS

Une fibre optique (1) comprend un cœur (90) et une gaine optique (200). Le cœur (90) est constitué d'une matrice (100) de cœur contenant des nanoparticules (110). Les nanoparticules (110) sont constituées d'une matrice (120) de nanoparticule entourée d'une couche externe. La matrice (120) de nanoparticule comprend des atomes dopants du groupe des terres rares (130) dans une proportion telle que le rapport atomique entre le nombre d'atomes de la matrice (120) de nanoparticule autres que l'oxygène, et le nombre d'atomes de terres rares (130) est compris entre 300 et 1000. La couche externe consiste en une matrice de couche externe sensiblement dépourvue de tout atome de terres rares (130), et ayant une épaisseur comprise entre 1 nm et 2 nm. Une telle fibre permet d'atténuer les mécanismes PIQ (« Pair-Induced Quenching »; soit Extinction Induite par des Paires) et HUC (« Homogeneous Up-Conversion »; soit Conversion Ascendante Homogène). An optical fiber (1) comprises a core (90) and an optical cladding (200). The heart (90) consists of a core matrix (100) containing nanoparticles (110). The nanoparticles (110) consist of a matrix (120) of nanoparticle surrounded by an outer layer. The nanoparticle matrix (120) comprises doping atoms of the rare earth group (130) in a proportion such that the atomic ratio between the number of atoms of the nanoparticle matrix (120) other than oxygen, and the number of rare earth atoms (130) is between 300 and 1000. The outer layer consists of an outer layer matrix substantially free of any rare earth atom (130), and having a thickness between 1 nm and 2 nm. Such a fiber makes it possible to attenuate the PIQ mechanisms ("Pair-Induced Quenching" or Pairs-induced Extinction) and HUC ("Homogeneous Up-Conversion" or Homogeneous Ascending Conversion).

High-power CW fiber-laser

A CW fiber-laser includes a gain fiber having a reflector proximity-coupled to one end, with the other end left uncoated. A laser resonator is defined by the reflector and the uncoated end of the gain-fiber. Pump-radiation from two fast-axis diode-laser bar stacks is combined and focused into the uncoated end of the gain-fiber for energizing the fiber. Laser radiation resulting from the energizing is delivered from the uncoated end of the gain-fiber and separated from the pump-radiation by a dichroic mirror.

Optical fiber for light amplifier

An optical fiber used for an optical amplifier, which is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr+3) and erbium ions (Er+3) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at both wavelengths of 1.3 νm and 1.55 νm. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to an optical amplifier formed of only Pr+3 or only Er+3.

Broadband laser lamp with reduced speckle

Ultraviolet laser apparatus

An ultraviolet laser apparatus includes: a semiconductor laser that emits an excitation laser light; a fiber laser medium to which the excitation laser light enters from the semiconductor laser and that causes laser oscillation; and an external resonator that: converts a wavelength of a laser light oscillated in the fiber laser medium, and outputs an ultraviolet region continuous wave of at least 0.1W.

Fiber optic amplifier and laser

본 발명은 광섬유증폭기, 레이저와 이들을 포함하고 있는 광통신시스템에 관한 것으로서, 광섬유증폭기가 광섬유증폭기를 통해 섬유와 결합된 반도체 다이오드 레이저에 의해 790nm에서 펌프되는 튤륨이 도핑된 광섬유로 구성되고, 이 증폭기가 광신호에 증폭을 주기 위하여 시스템 섬유의 쌍에 직렬로 광학적으로 연결된 것을 특징으로 한다.

Laser oscillator and laser amplifier

Mid-infrared laser system, mid-infrared optical amplifier, and method of operating a mid-infrared laser system

The mid-infrared laser system has an amplifier including at least one pump laser adapted to generate a pump laser beam and a length of fiber made of a low phonon energy glass and having at least one laser-active doped region between a first end and a second end, and a seed laser to generate a seed laser beam having a seed optical spectrum in the mid-infrared. The seed laser beam is launched into the first end to generate a mid-infrared laser beam outputted from the second end via stimulated emission upon pumping of the at least one laser-active doped region with the pump laser beam. When the power of the pump laser exceeds a spectrum modification threshold, the mid-infrared laser beam has an output optical spectrum being broadened relative to the seed optical spectrum.

Ultraviolet light source device

Provided is an ultraviolet light source device comprising an excitation light source, an optical waveguide having a core portion for generating light by absorbing the excitation light from the excitation light source, an optical coupling portion for coupling the excitation light from the excitation light source optically with the core portion of the optical waveguide, and a light radiation section for radiating light generated from the optical waveguide to the outside, and is characterized in that the excitation light from the excitation light source has any wavelength selected from a wavelength range of 340-500 nm, the core portion of the optical waveguide contains of at least one kind of rare earth element selected from Nd, Gd, Tb, Dy, Ho, Er, or Tm, and the light generated from the optical waveguide has a wavelength of 405 nm or less and shorter than the wavelength of the excitation light.

High-power CW fiber-laser

A CW ytterbium-doped fiber-laser includes a gain-fiber having a reflector proximity-coupled to one end, with the other end left uncoated. A laser resonator is defined by the reflector and the uncoated end of the gain-fiber. Pump-radiation from fast-axis diode-laser bar-stacks emitting at 915 nm and 976 nm is combined and focused into the uncoated end of the gain-fiber for energizing the fiber. Laser radiation resulting from the energizing is delivered from the uncoated end of the gain-fiber and separated from the pump-radiation by a dichroic mirror.

Laser device

Optical fiber and laser oscillator using same

本發明之課題在於抑制光纖之端部之損傷。光纖6包括第1光纖本體61、第2光纖本體62、及第1端帽63。第1光纖本體61具有第1纖核611及第1纖殼612。第2光纖本體62具有第2纖核621及第2纖殼622，且第1端面623接合於第1光纖本體61之第1端面613。第1端帽63具有透光性，且接合於第2光纖本體62之第2端面624。第1纖核中摻雜有雷射介質。第2纖核中之雷射介質之質量含有率，低於第1纖核中之雷射介質之質量含有率。

Yitterbium laser system

An apparatus, composition, and method for producing an optical gain. The apparatus includes: an optical fiber having a core and a multiple cladding, the core being doped with Yb3+; a light source producing light at a wavelength in a range of from about 0.8 to about 1.06 microns to energize the yb3+ to produce laser action; and wherein the core is essentially devoid of Nd3+.

Hybrid optical amplifier having improved gain tilt

A hybrid, erbium doped fiber amplifier device (Fig. 3A) has a dynamic gain tilt that is less than the gain tilt of any of the constituent fibers. The hybrid amplifying device has at most one less pumping source than the number of constituent waveguides of the device. The hybrid device automatically provides an effective change in the pump distribution among the constituent doped waveguide sections (27, 29) so as to achieve a readjustment of the relative gains of the constituent sections. As such, a change in the aggregate gain of the hybrid device will be as nearly spectrally uniform as possible over a range of gain values compared to the constituent doped waveguides (27, 29). A method for constructing a hybrid optical amplifying device having improved dynamic gain tilt is also provided.

Broadband emission material and white light emission material

Ein Breitbandemissionsmaterial gemäß der vorliegenden Erfindung schließt ein: ein Fluoridglas enthaltend 20 bis 45 Mol-% AlF3, insgesamt 25 bis 63 Mol-% Erdalkalifluoride und 3 bis 25 Mol-% zumindest eines Fluorids eines Elements ausgewählt aus der Gruppe bestehend aus Y, La, Gd und Lu; und Ytterbiumionen, die als divalente Seltenerdionen in das Fluoridglas eingebaut sind, um als ein lumineszierendes Zentrum zu dienen, wobei das Fluoridglas 1 bis 15 Mol-% zumindest eines Halogenids eines Elements ausgewählt aus der Gruppe bestehend aus Al, Ba, Sr, Ca und Mg und eines Elements ausgewählt aus der Gruppe bestehend aus Cl, Br und I einschließt; und wobei die Erdalkalifluoride 0 bis 15 Mol-% MgF2, 7 bis 25 Mol-% CaF2, 0 bis 22 Mol-% SrF2 und 0 bis 5 Mol-% BaF2 einschließen. A broadband emission material according to the present invention includes: a fluoride glass containing 20 to 45 mol% AlF 3, a total of 25 to 63 mol% alkaline earth fluorides and 3 to 25 mol% of at least one fluoride of an element selected from the group consisting of Y, La, Gd and Lu; and ytterbium ions incorporated into the fluoride glass as divalent rare earth ions to serve as a luminescent center, wherein the fluoride glass has 1 to 15 mol% of at least one halide of an element selected from the group consisting of Al, Ba, Sr, Ca and Mg and an element selected from the group consisting of Cl, Br and I; and wherein the alkaline earth fluorides include 0 to 15 mole% MgF 2, 7 to 25 mole% CaF 2, 0 to 22 mole% SrF 2, and 0 to 5 mole% BaF 2.

Optical fibre amplifier and laser.

Un amplificateur à fibre optique comprend une fibre optique dopée au thulium (2) pompée à 790 nm par un laser à diode à semi-conducteurs (20) couplé à la fibre (2) par l'intermédiaire d'un coupleur (12) de fibre optique. L'amplificateur (2) est optiquement couplé en série à une paire de fibres du système (18 et 14) pour fournir une amplification aux signaux optiques. An optical fiber amplifier comprises an optical fiber doped with thulium (2) pumped at 790 nm by a semiconductor diode laser (20) coupled to the fiber (2) via a coupler (12) of optical fiber. The amplifier (2) is optically coupled in series with a pair of system fibers (18 and 14) to provide amplification to the optical signals.

Optical glass optical waveguide amplifier and optical waveguide laser

Glass for high and flat gain 1.55 μm optical amplifiers

The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification and which are doped, for 100 parts by weight constituted by: P 2 O 5 15-40 MgF 2 0-10 Al 2 O 3  0-5 CaF 2 0-25 MgO  0-9 SrF 2 0-25 CaO  0-9 BaF 2 0-20 SrO  0-9 KHF 2 0-2 BaO  0-45 K 2 TiF 6 0-2 AlF 3  5-25 with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and very flat spectrum over the 1550 nm bandwidth. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.

Patent TW211089B

Glass-ceramic materials especially for lasers and optical amplifiers, doped with rare earths

A glass-ceramic material that is doped with rare-earths and is especially suitable for lasers and optical amplifiers is disclosed. The glass-ceramic material is optically non-scattering, and the doping with rare earths is essentially in the microcrystalline phase. The glass-ceramic material is preferably made up from complexes of metals having a valency of three or greater and of halides of rare earth ions having a valency of three or greater. The rare-earth ions include an optically active rare-earth ion.

Optical fiber and laser oscillator using same

An optical fiber (6) includes a first optical fiber body (61), a second optical fiber body (62) and a first end cap (63). The first optical fiber body (61) includes a first core (611) and a first cladding (612) . The second optical fiber body (62) includes a second core (621) and a second cladding (622), and is joined at a first end surface (623) thereof to a first end surface (613) of the first optical fiber body (61). The first end cap (63) has light permeability and is joined to a second end surface (624) of the second optical fiber body (62). The first core (611) is doped with a laser medium. A mass content of the laser medium in the second core (621) is lower than that of the laser medium in the first core (611).

Broadband laser lamp with speckle reduction

All-fiber laser device for mid-infrared wavelength band

본 발명은 3∼4um 파장의 중적외선 파장대에서 발진하는 완전 광섬유 레이저 소자를 제공한다. 본 발명은 광섬유 코어에 3∼4um 파장의 중적외선 파장대에 해당하는 에너지 천이 준위를 갖는 희토류 원소가 도핑되어 있는 비실리카 광섬유를 이득 매질로 이용한다. 상기 비실리카 광섬유에 패브리-패로형 공진기나 고리형 공진기를 설치하거나, 상기 비실리카 광섬유의 양단에 실리카 광섬유를 연결하고, 상기 실리카 광섬유에 패브리-패로형 공진기나 고리형 공진기를 설치할 수 있다. 이에 따라, 본 발명의 완전 광섬유 레이저 소자는 완전 광섬유 방식으로 3∼4um 파장의 중적외선 파장대에서 레이저 발진을 할 수 있다. The present invention provides a complete fiber laser device oscillating in the mid-infrared wavelength band of 3 to 4 um wavelength. The present invention uses, as a gain medium, a non-silica optical fiber doped with a rare earth element having an energy transition level corresponding to a mid-infrared wavelength band of 3 to 4 um wavelength in the optical fiber core. A Fabry-Perot type resonator or a ring resonator may be installed in the non-silica optical fiber, or silica fibers may be connected to both ends of the non-silica fiber, and a Fabry-Perot type resonator or a ring resonator may be installed in the silica optical fiber. Accordingly, the fully optical fiber laser device of the present invention can perform laser oscillation in the mid-infrared wavelength band of the 3 to 4 um wavelength in the full optical fiber method.

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.

A system and method for an improved light-emitting device

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.

Mid-infrared supercontinuum fiber laser

Mid-IR supercontinuum laser source in the 3-12 micron region generating at least tens of watts of optical power and based on non-silica optical fiber pumped by a ZBLAN fiber laser generating light at about 2.7 microns. The zero-dispersion wavelength of the non-silica fiber substantially coincides with the lasing wavelength. The proportion of the SC output above 3 microns exceeds 40 percent of the overall power output.

Monolithic mode-locked laser

A monolithic laser cavity (100, 200, 300, 400) for generating an output series of pulses (37) based on an input pump signal 36. This is achieved by a novel cavity design that utilizes a transparent, low-loss, and near zero-dispersion spacer (38) to form an optical resonator without the use of wave-guiding effects. The pulse forming material (32), optical elements (10-16, 30, 31, 33), and the laser gain medium (34) are in direct contact with the spacer and/or each other without any free-space sections between them. Therefore, the light inside the laser cavity never travels through free space.

Fibre laser device

Provided is a fibre laser device capable of avoiding problems caused by heat accumulation in a fibre which occurs due to shortening of the fibre to achieve device miniaturisation. This fibre laser device (10) uses a short fibre (19) having a highly concentrated active element added thereto. Ferrules (31, 32) are inserted into the end portions of the fibre (19). The fiber laser device is provided with a housing (30) that accommodates the fibre (19), where the fibre is supported by the ferrules (31, 32). The housing (30) and the ferrules (31, 32) are made of a metal material which has a thermal expansion coefficient similar to that of the material of fibre (19).

Optical fiber for optical amplifiers

Multiwavelength source

The source has a broad band optical light source (2) feeding an optical separation circuit (3) through an optical isolator. The optical separator is made up of a number of cascaded optical Bragg networks (14..17). Each network selectively reflects one wavelength (ln.1) to an optical coupler, and thus to an output unit (20).

A laser glass

본 발명은 식 53ZrF 4 -25BaF 2 -(2-x)LaF 3 -3AlF 3 -15NaF-2ErF 3 -xTmF 3 으로 이루어진 녹색 및 적색을 방출하는 레이저 유리에 관한 것이다. The present invention formula 53ZrF 4 -25BaF 2 - relates to a laser glass that emits green and red consisting of (2-x) LaF 3 -3AlF 3 -15NaF-2ErF 3 -xTmF 3. 본 발명의 레이저 유리는 녹색 및 적색 방출 효율이 각각 2배 및 500배 이상 향상된 매우 우수한 성질을 가지고 있다. The laser glass of the present invention has a very good property of improving green and red emission efficiency by 2 times and 500 times or more, respectively.

Verfahren zur kompensation der dispersion von faserlasern auf fluoridbasis im zweiten optischen fenster

Optical fiber and method of forming the same

Various embodiments may provide an optical fiber. The optical fiber may include a medium having a first refractive index. The optical fiber may also include a first plurality of optical elements included in the medium, the first plurality of optical elements extending along a longitudinal length of the optical fiber, the first plurality of optical elements being solid rods having a second refractive index lower than the first refractive index. The optical fiber may further include a second plurality of optical elements included in the medium, the second plurality of optical elements extending along the longitudinal length of the optical fiber, the second plurality of optical elements being ring-shaped elements having a third refractive index higher than the first refractive index.

Mid-infrared optical fibers with enhanced OH-diffusion resistance

Mid-infrared-transparent optical fiber products with enhanced resistance to OH diffusion are disclosed, which may be used fiber laser oscillator and amplifiers systems. In one embodiment, an optical fiber product may include optical fiber configured for propagation of mid-infrared radiation toward a light-radiating endface of or coupled to the optical fiber, and a diffusion barrier disposed on the light-radiating endface and configured for allowing the mid-infrared radiation emanating from the light-radiating endface to pass therethrough and for preventing OH diffusion therethrough toward the light-radiating endface. In another embodiment, an optical fiber product may include an optical fiber for propagation of mid-infrared radiation and an endcap coupled to the optical fiber for receiving therefrom the mid-infrared radiation and radiating out the mid-infrared radiation, the endcap being made of an endcap material that has no or a low amount of fluoride and that is less permeable to OH diffusion than the fiber-optic material.

Glass

The present invention relates to a dysprosium-doped tellurite or germanate glass characterised by a fluorescence peak in the mid-IR spectrum.

Glass

The present invention relates to a dysprosium-doped tellurite or germanate glass characterised by a fluorescence peak in the mid-IR spectrum.

Supercontinuum system with microstructured photonic crystal fibers based on fluoride glass

A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air- filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500nm) from 140fs, 1nJ pulses at 1042nm are disclosed.

Laser device

A laser apparatus includes a laser oscillator including a mirror, and an external resonator including a nonlinear optical crystal that functions as a phase conjugate mirror relative to a laser beam entered from the laser oscillator, wherein a phase conjugate wave reflected on the phase conjugate mirror reaches the mirror of the laser oscillator, whereby the mirror and the phase conjugate mirror face each other automatically to cause laser oscillation, and a wavelength and phase of the laser beam by the laser oscillation are locked passively.

レーザー装置

【課題】光学材料を位相共役ミラーとして用いることで、複雑かつ高精度な制御・調整が不要でかつ安定したレーザー光出力が可能なレーザー装置を提供する。【解決手段】このレーザー装置２０は、ミラー３を備えるレーザー発振器２１と、レーザー発振器から入射したレーザー光に対し光共役ミラーとなる光学材料１０を含む外部共振器２２と、を備え、光共役ミラーで反射した位相共役波がレーザー発振器のミラー３に至ることで、ミラーと光共役ミラーとが自動的かつ受動的に正対してレーザー発振をし、レーザー発振によるレーザー光の波長および位相が受動的にロックされる。【選択図】図１

激光装置

本发明提供一种激光装置，通过将光学材料用作相位共轭镜，不需要复杂且高精度的控制、调整，并且能够进行稳定的激光输出。该激光装置(20)具备：激光振荡器(21)，其具有反射镜(3)；外部谐振器(22)，其包含相对于从激光振荡器入射的激光成为光共轭镜的光学材料(10)，通过由光共轭镜反射的相位共轭波到达激光振荡器的反射镜(3)，反射镜和光共轭镜自动且被动地正对而进行激光振荡，被动地锁定激光振荡产生的激光的波长和相位。

Active lma optical fiber with enhanced transverse mode stability

An active LMA optical fiber for mitigating Transverse Mode Instability effects is provided. The core of the fiber includes a center core region having one or more rare-earth center dopants and one or more center co-dopants, and a peripheral core region free of rare-earth dopants and having one or more peripheral dopants. The radial refractive-index profile of the core is generally continuous across a boundary between the center core region and the peripheral core region. The selection and the concentrations and distributions of the rare-earth center dopants, the center co-dopants and the peripheral dopants are such that the temperature coefficient is lower in the peripheral core region than in the center core region.

녹색 및 적색을 방출하는 레이저 유리

본 발명은 식 53ZrF 4 -25BaF 2 -(2-x)LaF 3 -3AlF′ 3 -15NaF-2ErF 3 -xTmF 3 으로 이루어진 녹색 및 적색을 방출하는 레이저 유리에 관한 것이다. 본 발명의 레이저 유리는 녹색 및 적색 방출 효율이 각각 2배 및 500배 이상 향상된 매우 우수한 성질을 가지고 있다.

Multiwellenlängenquelle

Fibre laser device

Laservorrichtung

Laservorrichtung

Visible and tunable ring cavity laser source

A ring cavity laser source, a tunable ring cavity laser source and a method of fabricating a ring cavity laser source. The fiber ring cavity laser source comprises a fiber pigtailed pump laser; a fiber-based gain medium; a fiber-based circulator; a fiber-based coupler, wherein an input fiber port of the fiber-based coupler is coupled to a first end of the fiber-based gain medium, a first output fiber port of the fiber-based coupler is coupled to a first fiber port of the fiber-based circulator, and a second output fiber port of the fiber-based coupler is configured for extracting a laser output of the fiber ring cavity laser source; a fiber-based reflector coupled to a second fiber port of the fiber-based circulator; and a fiber-based combiner, wherein a first input fiber port of the fiber-based combiner is coupled to the fiber pigtailed pump laser, a second input fiber port of the fiber-based combiner is coupled to a third fiber port of the fiber-based circulator, and an output fiber port of the fiber-based combiner is coupled to a second end of the fiber-based gain medium; wherein the fiber-based reflector is configured for wavelength tuning of the laser output.

Monolithic Mode-Locked Laser

A monolithic laser cavity (100, 200, 300, 400) for generating an output series of pulses (37) based on an input pump signal 36. This is achieved by a novel cavity design that utilizes a transparent, low-loss, and near zero-dispersion spacer (38) to form an optical resonator without the use of wave-guiding effects. The pulse forming material (32), optical elements (10-16, 30, 31, 33), and the laser gain medium (34) are in direct contact with the spacer and/or each other without any free-space sections between them. Therefore, the light inside the laser cavity never travels through free space.

Dual wavelength pumped laser system and method

A dual wavelength pumping system and method have been developed to improve the efficiency of laser systems operating in the raid infrared region has been developed, in a conventional system the ions are excited from a ground state to an upper lasing state using a light pump. They then undergo a laser transition to leave the ion in a long lived post lasing excited state from which it eventually decays back to the ground state. In contrast they present system uses a first light pump to pump ions from the ground state to the post lasing state, and a second light pump to pump ions from the post lasing state to the upper lasing state. This system thus exploits the long lifetime of the post lasing state to enable it to become a virtual ground state for the second laser allowing continued cycling of ions between the upper lasing state and the post lasing state. A system using an Erbium, doped fibre generated a 3.5 μm laser output with an average power of over 250 mW and an initial slope, efficiency of 25.4% (previous system have only generates less than 10 mW of power with efficiencies of 3%).

Mid-infrared semiconductor saturable absorber mirror based on inas/gasb superlattice and preparation method thereof

A mid-infrared semiconductor saturable absorber mirror based on InAs/GaSb superlattice comprises a GaSb substrate with an anti-reflection film coated on the lower surface of the GaSb substrate; InAs/GaSb superlattice which has a specific structure and thickness and is arranged on the GaSb substrate; and Bragg reflection film which is arranged on the InAs/GaSb superlattice, wherein Bragg reflection film is composed of multiple pairs of ZnS and YbF3 film layers with a thickness of ¼ wavelength, and the YbF3 film layer is connected with the InAs/GaSb superlattice. The device not only has a mid-infrared working range with a broadband operation bandwidth, but also has the advantages of designable parameters, outstanding robustness, high damage threshold and the like, and sets a foundation for the development of mid-infrared ultrafast mode-locked lasers.