Diodengepumpter Mikrokristall-Laser für Superheterodyn-Interferometer

INTERFERENZLAENGENMESSVERFAHREN MIT EINEM UNSTABILISIERTEN LASER ALS LICHTQUELLE

Kompaktes Lasersystem mit Mehrfachresonator

Mode-locked laser

A hybrid type passively and actively mode-locked laser comprises two loops (100);(300) coupled together by a coupler (200) in a figure-of-eight configuration. One of the loops (100) is a non-linear amplifying loop of conventional passively mode-locked type, while the other loop (300) includes an optical modulator (330) and an optical gain medium (350) such as an EDF to provide active mode-locking. The loop (300) may include a time delay line (340) for adjusting the laser oscillation repetition rate. The ultra-short optical pulses generated can be applied to high speed time division multiplexed optical communication systems, high speed optical signal processors, and ultrafast optical phenomenon studies.

Short coupled cavity laser

Single longitudinal mode operation is achieved and maintained under CW and high speed (Gbps) current modulation conditions by a short coupled cavity laser including a short cavity semiconductor laser having two parallel mirror facets and a reflective surface spaced apart from and in predetermined relationship with one of the mirror facets. A short external cavity resonator is formed between the one mirror facet and the reflective surface. In general, the laser cavity length is related to the external cavity resonator length by the equation, nL=md, where nL is the effective optical length of the injection laser, d is the length of the external cavity resonator, and m is a positive number preferably between 2 and 10.

High-energy laser with multiple phased outputs

DEVICE FOR PRODUCING LASER LIGHT

PRODUCTION OF ELECTRONIC CARRIER SIGNALS WITHIN THE OPTICAL RANGE

LASER RESONATOR ARRANGEMENT

LASERVORRICHTUNG

UNSTABLE LASER RESONATOR WITH RADIALLY VARIABLE OF REFLEKTIVER UNCOUPLING DEVICE.

OPTICAL RESONATOR WITH SPIRAL OPTICAL ELEMENTS

Laser device

Apparatus for the generation of variable duration laser pulses

LASER

PARAMETRIC GENERATION USING INTERSECTING CAVITIES

A parametric device having a non-linear material (4) for generating an id ler wave and a signal wave (16) in response to a pump wave (14), the pump, i dler and signal waves being non-collinear, the device having a cavity (10, 1 1) resonant at the pump wavelength and means for varying the angle between t he propagation directions of the pump and idler waves.

CONTROL OF RELAXATION OSCILLATIONS IN INTRACAVITY OPTICAL PARAMETRIC OSCILLATORS

An intra-cavity optical parametric oscillator. The oscillator includes means (30) for providing a non-linear loss for suppressing relaxation oscillations.

LASER DEVICES USING GAIN MEDIA IN OUT OF PHASE MODE

The basic gain medium enclosure for the laser devices that comprises two parallel lateral mirrors (1 and 2), which geometrically defi the extent of t he gain medium enclosure and which allow the formation of lateral stationary sinusoidal waves.

METHODS AND APPARATUS FOR GENERATING RGB LASER LIGHT

A dual-cavity single longitudinal mode (SLM) laser oscillator generates a pulsed laser signal having a long pulsewidth, long coherence length, and good shot-to-sho t energy stability. The laser oscillator has a first cavity between an output coupler and a rear mirror and a second cavity between the output coupler and an intra-cavity mirror disposed between the output coupler and rear mirror. High-loss cavity optics and a passive Q- switch achieve a very high number of round trips that reduce the number of cavity modes down to two or three. The dual cavity design further discriminates between the remaining modes and allows SLM operation. The laser oscillator and an amplifier can be used as a pump laser for a laser system that generates red, green, and blue pulses for holographic recording. A wavelength conversion stage uses optical parametric amplifier(s), doubling crystals, an d sum-frequency mixers to produce RGB light from the pump pulses.

LONG WAVELENGTH INFRARED DETECTION AND IMAGING WITH LONG WAVELENGTH INFRARED SOURCE

An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (5). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector (32) detects radiation backscattered from the target (5). An analyser determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP2 (ZGP) crystal. On stimulation by the pump beam, the ZnGeP2 (ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the ...

SOLID STATE LASER OPTIMIZED FOR MULTIMODE OPERATION

Two solid state laser structures are provided which are optimized for multimode operation. The first laser structure has a plurality of normal incidence optically transmissive surfaces in the laser cavity (11, 12). The most reflective one of those normal incidence surfaces (18) is disposed at t he optical center (16) of the laser cavity (11, 12). The gain medium (20) is centered in the subcavity (11, 18) defined by a cavity mirror and the optica l center (16). In the second laser structure, there are no normal incidence surfaces in the laser cavity (31, 32), and the gain medium (30) is disposed at the optical center (36) of the laser cavity (31, 32). The laser structures a re employed to construct erbium glass lasers which are not only optimized from multimode operation but also have effective cooling of the gain medium (30) and minimized thermal lensing effect.

Optischer Maser

Laser-Gerät

Verfahren zur Modulation eines Laserstrahles

Optischer parametrischer Oszillator

Anordnung zur Erzeugung und/oder Verstärkung von elektromagnetischen Schwingungen im optischen Spektralgebiet

Redresseur

Laser

SYSTEM Of EMISSION Of a POLYCHROMATIC LIGHT HAS SOUS-CAVITES COUPLEES

NDYAG LASER HAS LONG WAVELENGTH AND METHOD FOR PRODUCING A HIGH-POWER LASER BEAM

Device to produce and amplify electromagnetic oscillations of the optical spectrum

Optical maser

LASER CAVITY CENTER-PULL COUPLING BY POLARIZATION FOR INTRACAVITY INTENSE COHERENT BEAMS

The invention relates to a laser cavity with central extraction by polarisation for coherent coupling of intense intra-cavity beams. The laser cavity (1) according to the invention comprises an extraction unit (7) with central extraction, which divides the laser cavity (1) longitudinally into two functional portions (P1, P2), namely a first portion (P1) including the active components (3), which amplifies the laser beams (4), and a second portion (P2) which performs coherent coupling of the laser beams (4).

“LASER CONTINUOUS, TRIPLE IN FREQUENCY IN INTRA-CAVITE AND MONOFREQUENCE”

LOW NOISE SOLID STATE LASER

L'invention concerne un laser à état solide (10) comprenant une cavité (C) comprenant un milieu amplificateur (MA), et présentant une direction d'oscillation (A) d'un faisceau laser (F), la cavité comprenant en outre: - une première lame biréfringente (LB1) à faces parallèle présentant un premier axe optique (OA1) formant un premier angle (α) avec la direction d'oscillation (A), de manière à générer, à partir d'un faisceau laser (F) unique, un premier (Fo) et un deuxième (Fe) faisceaux laser parallèles entre eux et présentant un premier décalage spatial (DS1), correspondant respectivement à un premier (o) et un deuxième ( e) état propre de polarisation orthogonaux entre eux, et sur lesquels le laser est apte à osciller, la première lame biréfringente (LB1) et la cavité étant configurées pour que la première lame biréfringente sépare une première zone (Z1) de la cavité (C) dans laquelle le faisceau laser (F) est unique, d'une deuxième zone (Z2) comprenant lesdits premier (Fo) et deuxième ...

Laser YAG with neodymium with big wavelength

Ce laser comprend un boîtier (6) comprenant une cavité optique réfléchissante, un barreau laser (1) installé dans la cavité optique et comportant un dopage au néodyme, une lampe de pompage (2) installée dans la cavité optique près du barreau laser et envoyant une lumière au barreau laser, des moyens (13) de commande de la lampe de pompage de manière qu'elle produise des impulsions intermittentes de lumière, des moyens (18, 18', 19, 19') formant résonateur sélectif vis-à-vis des longueurs d'onde pour produire une réflexion maximale et permettre une oscillation laser dans la gamme de 1,4 à 1,5 mum, le barreau laser possédant un niveau de concentration en néodyme compris entre environ 0,3 et 0,7 N. Application notamment aux lasers utilisés dans des applications médicales. This laser comprises a housing (6) comprising a reflecting optical cavity, a laser rod (1) installed in the optical cavity and comprising a neodymium doping, a pumping lamp (2) installed in the optical cavity near the laser rod and sending a light at the laser rod, means (13) for controlling the pumping lamp so that it produces intermittent pulses of light, means (18, 18 ', 19, 19') forming a selective resonator with respect to screw wavelengths to produce maximum reflection and allow laser oscillation in the range of 1.4 to 1.5 mum, the laser rod having a neodymium concentration level of between about 0.3 to 0.7 N Application in particular to lasers used in medical applications.

MONOLITHIC SOLID MICROLASER HAS ACTIVE RELEASE BY WEAK TENSION OF ORDER

Microlaser comportant un milieu constitué d'un matériau actif laser, formant une première cavité résonnante entre un miroir d'entrée et un miroir intermédiaire, un second matériau formant une seconde cavité résonnante entre le miroir intermédiaire et un miroir de sortie, caractérisé en ce que des moyens de réduction du faisceau laser sont disposés en entrée de la première cavité résonante, l'ensemble des deux cavités et des moyens de réduction du faisceau laser étant monolithiques ...

METHOD OF MODULATING A LASER BEAM AND RELATED APPARATUS

Laser appts. with thermal and mechanical operating modes

A laser appts., with a resonant cavity having an assembly of two different reflectors and contg. an active medium which emits radiation when excited, has either (a) at least one Q-switch element which can be positioned in the beam path within the cavity or outside the beam path; or (b) a second resonant cavity which can be displaced to permit positioning of one or other of the resonant cavities on the axis of the active medium.

TWO-LIGHT FLUX INTERFERENCE EXPOSURE DEVICE, TWO-LIGHT FLUX INTERFERENCE EXPOSURE METHOD, SEMICONDUCTOR LIGHT EMITTING ELEMENT MANUFACTURING METHOD, AND SEMICONDUCTOR LIGHT EMITTING ELEMENT

It is possible to realize a 2-light flux interference exposure device capable of generating a significantly uniform laser beam having a high coherence by using a double higher harmonic of Ar laser or a quadruple higher harmonic of Nd dope YAG laser as a light source, an etalon, and a half-wavelength plate. Moreover, by the 2-light flux interference exposure, a photo resist mask is subjected to exposure of cyclic pattern. The photo resist mask is developed. By using the resist pattern as a mask, a semiconductor layer etching mask pattern is formed. After the resist is removed, the light extraction surface is etched. Thus, it is possible to manufacture a semiconductor light emitting element having a high energy conversion efficiency at a significantly low cost. © KIPO & WIPO 2008 ...

Unstable imaging resonator

In one aspect a power amplifier comprises a first plurality of laser disks disposed in a first vertical plane and a second plurality of laser disks disposed in a second vertical plane, opposite the first vertical plane, wherein the plurality of laser disks are disposed in a central horizontal plane, and a first plurality of reflecting mirrors disposed in the first vertical plane and a second plurality of reflecting mirrors disposed in the second vertical plane, wherein a first set of reflecting are disposed in a lower horizontal plane and a second set of reflecting mirrors are disposed in an upper horizontal plane, wherein respective laser disks and reflecting mirrors adjacent along an optical axis are positioned to provide a 1:1 imaging system therebetween. Other aspects may be described.

TERAHERTZ SOURCE

An optical system includes a first gain medium configured to be excited by an energy source and in response generate a first optical signal having first and second wavelengths. A Q- switch is disposed adjacent to the first gain medium for generating a pulsed optical signal in response to receiving the first optical signal. A non-linear optical crystal is configured to output a second optical signal having a frequency based on difference frequency generation of the first and second wavelengths of the pulsed optical signal.

MULTI-CHIP VECSEL-BASED LASER TUNABLE INDEPENDENTLY AT MULTIPLE WAVELENGTHS

A laser device capable to simultaneously generate light at multiple wavelengths that are independently (and, optionally, simultaneously) tunable without a limit of how small a spectral separation between such wavelengths can be made is enabled with the use of a laser-cavity network that (i) contains multiple spatially-distinct laser cavity portions all of which have at least one spatial region of the cavity network in common and (ii) is defined by such optical elements that prevent the intracavity amplification of light at first and second of multiple wavelengths at the expense of the same laser gain medium. Each of the distinct cavity portions contains a dedicated laser chip supporting the generation of light at a corresponding wavelength. In a special case, at least two of the multiple lasing wavelengths in the output of the device can be simultaneously and independently tuned to become equal.

STABILISATION OF THE REPETITION RATE OF A PASSIVELY Q-SWITCHED LASER BY MEANS OF COUPLED RESONATORS

The invention relates to a Q-switched laser comprising a pump light source (1), an optical resonator, in which a laser medium (6) is situated and a passive Q-switch (5). The aim of the invention is to provide an improved Q-switched laser which has a simple, compact construction with a repetition rate that has at the same time the smallest possible degree of time jitter. To achieve this, according to the invention, part of the light that is decoupled from the optical resonator is fed to an optical delay line (9) by means of a beam splitter (8) and is re-coupled to the optical resonator once it has passed through said optical delay line (9). The optical resonator has a decoupling mirror (4) and the coupled resonator can contain a dichroic beam splitter (7) and a polarisation beam splitter (8).

OPTICAL SYSTEMS FOR EXTERNAL CAVITY FREQUENCY UPCONVERTING LASER ARRAYS

Surface emitting laser arrays with intra-cavity harmonic generation are coupled to an optical system (760, 765) that extracts harmonic light in both directions from an intra-cavity nonlinear optical material (715) in such a way that' the focusing properties of the light beams are matched.

EXTERNAL CAVITY SEMICONDUCTOR LASER WITH MONOLITHIC PRISM ASSEMBLY

A miniature, external cavity, filter-locked laser has a semiconductor optical amplifier, such as a diode laser, and a monolithic prism assembly positioned in the external resonant cavity. The monolithic prism assembly includes a transparent substrate carrying a thin film Fabry-Perot interference filter which is tilted, that is, oriented not normal to the path of the travel of the laser light in the external cavity. Such optical devices can be economically mass produced in advantageously small size, having reproducible spectral performance properties held within tight tolerances. Significantly advantageous applications include dense wavelength division multiplexing systems requiring tightly spaced wavelength subranges for each of the multiple channels. High wavelength stability against temperature and humidity changes, etc., can be achieved.

COMPACT LASER APPARATUS AND METHOD

A laser system (10) includes an apparatus and method having a primary laser resonator (11) having a laser medium (12) therein for producing a laser beam of a first wavelength and a second laser resonator (27) optically connected to the primary resonator (11) to allow a portion of the laser energy from the primary laser resonator (11) to pass into the secondary laser resonator (27). An optical parametric oscillator (27, 33) is located intracavity of the secondary laser resonator (27) and includes a non-linear crystalm (33) for producing a laser beam of a second wavelength therefrom.

Q-SWITCHED SEMICONDUCTOR LASER

A Q-switched semiconductor laser is supposed to facilitate high-frequency laser modulation with low currents or voltage ranges. According to the invention, a laser of this type consists of at least one continually pumped active medium and two optically coupled resonators at least one of which is passive, both resonators having different mode "" corresponding to the Nonius principle, at least one resonator mirror taking the form of a reflector with strongly dispersive reflection characteristics in the laser wavelength range selected by the double resonator, the index of refraction of the passive resonator and/or reflector capable of being adjusted electronically. With this device, the reflectivity of the laser wavelength can be adjusted in such a way that, with a fixed effective amplification by electrical modulation of the reflectivity of the resonator reflector with strongly dispersive reflection characteristics, the laser threshold can be raised or lowered so as to switch the semiconductor ...

METHOD AND DEVICE FOR OPERATING A LASER DIODE

The invention concerns a method of operating a laser diode (2) producing a beam (9) whose intensity is controlled by a control signal and which is directed along a first beam path (10) at the target surface (5), stray reflections from the target surface (5) which are unstable with respect to the diode (2) in time and/or space acting on the diode (2). An element (19, 28, 31, 37, 38) which is stable in time and with respect to the diode (2) in space is used to feed part of the light emitted by the diode back along a second beam path (11) to the active zone (42) of the diode (2) so that the diode (2) is kept in a state of coherence collapse.

Optical resonator with spiral optical elements

This invention discloses an optical resonator (24) including at least one spiral optical element (44) operative to change the angular phase distribution of modes in the optical resonator (24), thereby to generally eliminate undesirable modes.

POLARIZATION INDEPENDENT LIGHT MODULATION MEANS USING BIREFRINGENT CRYSTALS

A first optically birefringent crystal divides an incident randomly polarized light beam into two linearly polarized orthogonal components, namely, an ordinary ray and an extraordinary ray. The incident light beam is so related to the optic axis of the birefringent crystal that ordinary ray is undeviated but the exgraordinary ray is deviated by a selected amount, both of the rays emerging from the birefringent crystal parallel to each other. The amount of deviation is a function of the index of refraction and the length of the path through the crystal. The spaced rays are then directed through an electro-optical polarization modulator which electronically converts the linearly polarized components to elliptically polarized beams with the eccentricity dependent upon the magnitude of an applied electric field. For a particular magnitude of applied electric field, the polarization modulator will cause a 90 DEG rotation of the orthogonal components. The two emerging rays are then passed through ...

Coupled waveguide freespace laser

An RF discharge waveguide laser is modulated by an electro-optic modulator positioned in a second optical cavity coupled to a gain cavity containing the waveguide.

Multiple wavelength laser system

A laser system having plural optical paths, each with a dielectric mirror for extracting a different wavelength of light from a laser beam, and a laser medium movable with respect to the different optical paths for injecting the laser beam into a desired optical path. The laser medium is mounted to a motor driven carriage for moving the laser medium with respect to the different optical paths.

Cavity dumper

A laser cavity dumper capable of building up energy at a given mode or wavelength while emitting light of a different wavelength is created through use of a Fox interferometer with an electro-optic cell. The Fox interferometer can have either of two configurations. Placement of the electro-optic cell in either of two locations for each of these configurations will either cause the oscillating modes for the laser cavity to scan or undergo discreet shifts of preferred modes. The Fox interferometer can be adjusted for zero output of a selected wavelength under normal operating conditions. A voltage change in the electro-optic cell then changes the resonance from the lossless state through the beam-splitter causing the cavity to dump. A new mode will begin to oscillate as the previous modes are depleted.

Solid-state laser device

A solid-state laser device, comprising a first resonator arranged on a first optical axis, a second resonator arranged on a second optical axis, a first light emitter for entering an excitation light to the first resonator, a second light emitter for entering an excitation light to the second resonator, and further comprising a separated optical axis portion serving as a part of the first optical axis, a separated optical axis portion serving as a part of the second optical axis, a common optical axis portion where the first optical axis and the second optical axis are superimposed, a first solid-state laser medium arranged on the separated optical axis portion of the first optical axis, a second solid-state laser medium arranged on the separated optical portion of the second optical axis, and an optical member for wavelength conversion and wavelength switching means arranged on the common optical axis portion, wherein the optical member for wavelength conversion comprises a plurality of ...

Third harmonic laser system

A third harmonic laser system includes a fundamental wave resonator for generating fundamental laser beam, a second harmonic laser generator for converting fundamental laser beam to a second harmonic laser beam, and a third harmonic laser generator for mixing the second harmonic laser beam with the fundamental laser beam so as to produce a third harmonic laser beam. Multi-pass tripling is used for producing the third harmonic laser beam by means of reflecting and polarizing mirrors, and that the outputted third harmonic laser beam has a high efficiency of about 51% and a high power up to 8.6 W.

INTRA-CAVITY SUM-FREQUENCY MIXING USING SOLID-STATE AND SEMICONDUCTOR GAIN-MEDIA

A two-resonator laser arrangement for provides visible-wavelength radiation by sum-frequency mixing two different wavelengths of radiation circulating in the resonators in an optically nonlinear crystal located in the resonators. One of the resonators includes a solid-state gain-medium providing of one the two wavelengths and the other resonator includes a semiconductor gain-medium providing the other of the two wavelengths. A very short excited-state lifetime of the semiconductor gain-medium provides that noise and instability commonly encountered in the output of prior-art intra-resonator frequency-converted lasers is substantially reduced.

Integrated microwave-to-optical single-photon transducer with strain-induced electro-optic material

Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

PARAMETRIC GENERATION USING INTERSECTING CAVITIES

Laser arrangement with switchable frequency conversion

Harmonically mode-locked laser

The invention is an improvement of a harmonically mode-locked ring laser of the type comprising means (12) defining an optical path, an active laser medium (15) for emitting coherent light to be transmitted along the optical path, and means (18) included in the optical path for causing the light to propagate along the path as a train of pulses having a period which is substantially equal to the transit time of light pulses in the optical path divided by an integer. The improvement is characterized in that the optical path includes a Fabry-Perot optical resonator (24) having a free spectral range substantially equal to the pulse repetition rate of the optical pulses in the ring laser. Under this condition, the Fabry-Perot resonator tends to equalize the energy, shape and width of the individual pulses. ...

Wavelength stabilized light source

Unstable laser resonator with output coupler having radially variable reflectivity

LASER SYSTEM

PROBLEM TO BE SOLVED: To reduce changes in optical component and/or the effect of environmental disturbance by actively providing a plurality of different optical modes and laser beam is made to forcedly jump among provided optical modes. SOLUTION: The current of a diode 300 is dithered so that laser beam 60 is made to forcedly jumped among different optical modes more frequently than frequency of environmental disturbance. With this configuration, a laser system provides a plurality of optical modes when passive or positive component of an applied laser system and/or environmental condition changes, so the laser system finds a new matching optical mode at high possibility. Thus, the laser system restores from the fluctuation in optical component and/or environmental disturbance more quickly. So, a laser system with less change in optical component and/or effect of environmental disturbance is provided. COPYRIGHT: (C)2000,JPO ...

LASER DEVICE AND GENERATION METHOD FOR SECOND HIGHER HARMONIC OF LASER

PURPOSE: To provide a laser diode device which converts the infrared part into a blue light beam for the light beam that is generated by a laser diode and has an output facet of a small reflection factor which irradiates an infrared laser beam onto a nonlinear crystal resonator. CONSTITUTION: A mirror 18 is placed at the side of a resonator 16 of a nonlinear crystal 30 which is placed opposite to a laser diode 12. The mirror 18 transmits the blue light beams and reflects the infrared rays to return them into the diode 12 through the resonator 16. The diode 12 is locked at the resonance frequency of the nonlinear resonator 16. COPYRIGHT: (C)1992,JPO ...

Многолучевой источник лазерного излучения и устройство для обработки материалов с его использованием

FIELD: physics. SUBSTANCE: multiple-beam source consists of a generator and a multi-channel amplifier. Radiation generator comes to the input of the amplifier via the Extender, and then hardened individual fragments of a wide beam of the active element, consisting of laser plates located successively in several parallel ranges. Each plate contains elongated along the longitudinal axis of the plate at the heart of the active material and surrounding it with the side of a dormant shell. The space between all the plates is filled with heat sink elements. The pump radiation is fed through the free narrow faces of the plates. Treated material is placed on the base surface, conventionally divided into sectors according to the number of laser beams. Scanning heads installed over one of the vertices of each sector at an altitude determined by the formula h=d/tgα, where d is the diagonal length of the sector, α - maximum scan angle. To compensate alignment errors of laser heads used rigid frame with a square grid sensors. EFFECT: invention allows the simultaneous use of a large number of powerful laser beams to speed the processing of large volume products. 5 cl, 14 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 632 745 C2 (51) МПК H01S 3/082 (2006.01) H01S 3/05 (2006.01) B22F 3/105 (2006.01) B23K 26/064 (2014.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2015133253, 10.08.2015 (24) Дата начала отсчета срока действия патента: 10.08.2015 (72) Автор(ы): Павлов Владимир Валентинович (RU) (73) Патентообладатель(и): Павлов Владимир Валентинович (RU) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: US 7443903 B2, 28.10.2008. RU Приоритет(ы): (22) Дата подачи заявки: 10.08.2015 (43) Дата публикации заявки: 15.02.2017 Бюл. № 5 2082264 С1, 20.06.1997. RU 2142665 C1, 10.12.1999. JP 2001185795 A, 06.07.2001 . US6229939 B1, 08.05.2001. 2 6 3 2 7 4 5 R U (54) Многолучевой источник лазерного излучения и ...

Laser diode and control of operation

The laser diode 2 is controlled with image signals and outputs a divergent emission that is directed to a lens 18 to produce a coherent beam 9 to be received by a partially reflecting mirror 19 such that about 5% of the light is reflected as a feedback signal 11. this signal is received by the active zone of the laser diode. The transmitted component is focussed 22 onto the recording material 24.

Diodengepumpter Zwei-Wellenlängen-Laser mit polarisierten Strahlungsanteilen

Semiconductor-pumped single frequency solid body laser - where one mode is split into two polarisation directions perpendicular to each other, used for super-heterodyne interferometers

Laser (I) is claimed, in which one mode is split into two polarisation directions vertical to each, one direction can be determined in its frequency relative to the other direction of the same mode, whilst an air gap, arranged in the Brewster angle to the optical axis, is varied in its extension. Pref. one polarisation direction acts as reference frequency determined by temp. achieved by changing the lengths of an air gap which limits the Brewster surfaces of the laser crystal. The changing of the lengths of the air gap is achieved using an adhesive of high thermal expansion and good electrical conductivity by ohmic heating, the adhesive simultaneously acting to bound both crystals, or by using a piezoelectric polymer foil, e.g., PVDF; or by using a piezoceramic. USE/ADVANTAGE - (I) can be used for superheterodyne interferometers. It is compact, has low line width, and has the ability to produce to polarised beams vertical to each other.

Optischer Sender oder Verstaerker

STEUERUNG DER OPTISCHEN RÜCKKOPPLUNG ZUR FREQUENZUMWANDLUNG VON LASERDIODENSTRAHLUNG.

OPTISCHE VORRICHTUNG

High-energy laser with multiple phased outputs

A high-energy laser 10 comprises a ring of lesser-powered laser modules 12,14,16 from each of which an output is taken to be projected so that they all arrive in phase on a distant target. To phase lock the outputs of all the serial laser modules, the path lengths l of the laser modules are made equal, the path length around the large loop which includes all the laser modules is made an integral multiple of the laser-module path length, and at least two different feedback loops are employed.

A laser

Improvements in or relating to optical masers

... 1,048,566. Lasers. WESTERN ELECTRIC CO. Inc. Aug. 1, 1963 [Aug. 27, 1962], No. 30553/63. Addition to 985,204. Heading H3B. In a laser in which the negative temperature medium is disposed within an optical cavity resonator defined by a first reflector having a concave spherical shape and a second reflector partially transmissive to the stimulated light, an auxiliary reflector is positioned adjacent the optical cavity and axially spaced from the second reflector. The system of Fig. 1 comprises a gas laser including tube 18 having end surfaces 19, 21 orientated substantially at Brewster's angle to the light beam path therethrough, and containing a helium-neon gas mixture excited by R.F. source 22. The optical cavity resonator 13 is formed by concave spherical reflectors 11, 12, the surface being partially transmissive to the light at the operating frequency of the device and supported on a transparent member 14 the surface 16 of which is provided with an anti-reflection coating. Positioned ...

OPTICALLY PUMPED DIODE LASER WITH RESONATOR-INTERNAL FREQUENZUMWANDLUNG

PROCEDURE AND DEVICE FOR THE COHERENT UNIFICATION OF LASER RADIATION

LASER RESONATOR WITH INTERNAL BEAM SPLITTER

OPTICAL RESONATORS WITH ORTHOGONAL POLARIZED MODES

DOUBLE SIDE LASER SYSTEM WITH INTRAKAVITÄRER POLARIZATION AND PARTICLE PICTURE SPEED MEASURING SYSTEM, WHICH USE SUCH A LASER SYSTEM

LASER DEVICE

External cavity semiconductor laser with monolithic prism assembly

Laser systems and methods

Laser systems and methods are disclosed. One laser system comprises: a plurality of laser resonators, each resonator being operable to discharge an input laser beam; a relay assembly including at least one curved reflective surface that redirects each input laser beam, and reduces a beam size of the redirected beam; a galvo including a curved reflective surface that receives each redirected beam, and outputs a combined laser beam at power level greater than a power level of each laser input beam; and a coupling assembly that reduces spherical aberrations in the combined laser beam, and directs the combined laser beam into an optical fiber. In this system, the combined laser beam may have a maximum beam parameter product lower than a minimum beam parameter product of the optical fiber. Related systems and methods are also disclosed.

LASER WITH STABILIZED EXTERNAL PASSIVE CAVITY

LASER WITH STABILIZED EXTERNAL PASSIVE CAVITY Abstract of the Disclosure A laser having a stabilized external passive cavity is disclosed, with stabilization being effected by modulation of an external mirror positioned along the laser axis. The laser system includes first, second and third spaced mirrors with the second mirror being an output coupler positioned between the first and third mirrors so that an active cavity is defined between the first and second mirrors and a passive cavity is defined between the second and third mirrors. The active cavity feeds, or pumps, the passive cavity which is stabilized by modulation of the third mirror by movement along the laser axis by linear oscillation to Doppler shift the reflected waves within the passive cavity and thereby produce frequencies that do not interfere with the stable modes of the active cavity. By stabilization of the passive cavity, advantages of an inter cavity laser device can be realized without incurring the practical disadvantages of such devices, and results in a laser device that is particularly well suited for particle size measurement.

ADJUSTABLE PULSEWIDTH PICOSECOND FIBER LASER

A pulsed fiber laser generating light pulses in the picosecond range having an adjustable pulsewidth is provided. The fiber laser includes a figure-of-eight type laser cavity, preferably of polarization-maintaining optical fiber, defining reciprocal and non- reciprocal loops. A gain medium is disposed asymmetrically in the reciprocal loop, at a position therealong favoring cou-pling of light in the propagation direction of the non- reciprocal loop. A pump source is coupled to the reciprocal loop to inject pump light into the gain medium. The laser cavity is designed so that changing the pump power will directly affect the pulsewidth of the generated light pulses, providing a useful control mechanism of the pulsewidth.

ADJUSTABLE PULSEWIDTH PICOSECOND FIBER LASER

A pulsed fiber laser generating light pulses in the picosecond range having an adjustable pulsewidth is provided. The fiber laser includes a figure-of-eight type laser cavity, preferably of polarization-maintaining optical fiber, defining reciprocal and non- reciprocal loops. A gain medium is disposed asymmetrically in the reciprocal loop, at a position therealong favoring cou-pling of light in the propagation direction of the non- reciprocal loop. A pump source is coupled to the reciprocal loop to inject pump light into the gain medium. The laser cavity is designed so that changing the pump power will directly affect the pulsewidth of the generated light pulses, providing a useful control mechanism of the pulsewidth.

COMPACT LASER APPARATUS AND METHOD

A laser system includes an apparatus and method having a primary laser resonator having a laser medium therein for producing a laser beam of a first wavelength and a second laser resonator optically connected to the primary resonator to allow a portion of the laser energy from the primary laser resonator to pass into the secondary laser resonator. An optical parametric oscillator is located intracavity of the secondary laser resonator and includes a non-linear crystal for producing a laser beam of a second wavelength therefrom. The dual resonators combine a secondary laser cavity and an optical parametric oscillator to produce a predetermined output wavelength. The compact multiple resonator laser system has a substrate mirror system having four mirror surfaces thereon positioned to form two laser resonators. A multi-pass corner cube is mounted to fold the light beams between a pair of substrate mirrored surfaces while a transfer corner cube is positioned to transfer a laser beam from one resonator to the second resonator to form a very compact pair of laser resonators. A method of producing a coherent light beam of a predetermined output wavelength uses the compact laser system apparatus.

optical transmitter for a radiation with coherent phase

LASER HAS SURGE SHORT COUPLEES

LASER HAS MIRROR HAS CONJUGATION OF PHASE PER MIXTURE HAS FOUR WAVES AND PROCESS OF RESTORATION Of a TRADITIONAL LASER PER TRANSFORMATION INTO a LASER HAS MIRROR HAS CONJUGATION OF PHASE

Laser à miroir à conjugaison de phase par mélange à quatre ondes dans son milieu amplificateur (2), dans lequel ledit miroir (9) est généré par des moyens (5-8) exclusivement passifs. Il est prévu un milieu amplificateur unique (2) dans une cavité de Fabry-Pérot et lesdits moyens passifs (5-8) sont agencés pour générer des faisceaux de pompage formant une onde stationnaire dans ladite cavité. Le laser est bien adapté à l'usinage des matériaux.

LASER HAS MIRROR HAS CONJUGATION OF PHASE PER MIXTURE HAS FOUR WAVES AND PROCESS OF RESTORATION Of a TRADITIONAL LASER PER TRANSFORMATION INTO a LASER HAS MIRROR HAS CONJUGATION OF PHASE

LASER

PUMPED LASER SYSTEM USING FEEDBACK TO PUMP MEANS

WAVELENGTH VERSATILE VECSEL RAMAN LASER

A tunable lasing device including a vertical external cavity surface emitting laser, adapted to generate a fundamental laser beam in response to pumping from a pump source, said fundamental laser beam having a fundamental wavelength and a fundamental linewidth; a fundamental resonator cavity adapted to resonate the fundamental beam therein; a first optical element located within the fundamental resonator cavity for control of the fundamental linewidth of the fundamental beam; a Raman resonator located at least partially in said fundamental resonator adapted to receive the fundamental beam and comprising therein, a solid state Raman active medium located therein for generating at least a first Stokes beam from the fundamental beam wherein said Raman resonator cavity is adapted to resonate said Stokes beam therein and further adapted to emit an output beam; and further comprising a nonlinear medium located within the Raman resonator cavity for nonlinear frequency conversion of at least one ...

EFFICIENT FREQUENCY-CONVERTED LASER WITH SINGLE BEAM OUTPUT

An efficient frequency-converted solid-state laser that outputs a single beam utilizing an angled reflector (150) situated within the laser cavity. The laser comprises an optical cavity including a first reflector (101) and a second reflector (102). A gain medium (110) situated within the optical cavity is energized by a pump source to excite a laser emission (112) at a fundamental wavelength. A nonlinear material (130) is arranged within the optical cavity to convert the laser emission to a second wavelength. The angled reflector, which is reflective of the second wavelength and transmissive of the first wavelength, is situated within the optical cavity between the first reflector and the nonlinear material. In operation, the forward-propagating converted beam (131) is reflected from the second reflector, and then combines with the reverse-propagating converted beam (132). The angled reflector reflects the combined beam (140) so that it exits from the optical cavity at a nonzero exit angle ...

Narrow-band tunable optical source

A laser system capable of providing light of high intensity is disclosed. This system includes a laser gain medium and three reflectors. A first reflector and a second reflector spaced from the first reflector define a laser cavity that contains the laser gain medium. The second reflector has a reflectivity (R2) larger than the reflectivity (R1) of the first reflector such that light emitted from the laser gain medium resonates in the laser cavity. A third reflector having a reflectivity (R3) larger than the reflectivity of the first reflector (R1) is spaced from the second reflector to define a resonant cavity external to the laser cavity. Light passes from the laser cavity to resonate in the external resonant cavity. Part of the light passes from the external resonant cavity to the laser cavity to optically lock the laser gain medium. The distance between the second and the third reflectors is adjustable to tune the resonant frequency of the external cavity.

BANDWIDTH-LIMITED, CAVITY-DUMPED, LASER SYSTEM

A bandwidth-limited, cavity-dumped laser system having a mode-locked laser cavity in which the rear mirror thereof is replaced by a Michelson interferometer. A pulsed phase shifter with ends cut at Brewster's angle is placed in one arm of the interferometer. When a 90 DEG phase shift is abruptly applied to the one interferometer arm after the mode-locked pulse has reached peak intensity, the pulse will be dumped from the laser cavity.

Method and apparatus for passive mode locking high power lasers

A passively mode-locked laser suitable for use with homogeneously broadened lasing medium or a lasing medium having a high-power output, long relaxation time or a narrow bandwidth. The laser includes a main cavity in which the lasing medium is disposed and an external cavity including a non-linear element. The non-linear element is selected to induce a non-linear phase shift in a coherent beam from the main cavity. In operation, a portion of a laser beam in the main cavity is coupled to the external cavity and a phase-shifted output from the external cavity is reflected back into the main cavity to provide a narrow pulse, mode-locked output from the laser. In one embodiment the non-linear element of the external cavity is an optical fiber with a mirror disposed adjacent one end of the optical fiber to provide dual propagation of a laser pulse through the fiber. In high-power applications the external cavity mirror is disposed proximate but spaced apart from the optical fiber end. The ends ...

LASER WITH SERIALLY COUPLED MODE SELECTING RESONATOR SECTIONS

Intra-cavity second harmonic generation (shg) laser device

A laser device for intra-cavity frequency conversion, in particular, for the second harmonic generation, the device comprising a laser cavity, formed by the first and the second laser cavity end reflectors wherein the said laser cavity end reflectors are highly reflective for the radiation about the laser fundamental frequency and as such provide for a predetermined level of circulating inside the cavity fundamental frequency power; an active medium provided within the said laser cavity; at least one non-linear crystal, in particular, for the second harmonic generation provided within the same laser cavity; tuning means adapted for tuning at least one of laser cavity end reflectors; wherein at least one of the laser cavity end reflectors comprises an interferometric layout providing spectrally selective reflection for the radiation about the laser fundamental frequency with the value of reflectivity nearly to 100% within a spectral range close to the free spectrum range of the laser cavity and with a sufficiently lower reflectivity outside the above spectral range such that the laser cavity restricts the spectrum of the laser radiation to a single longitudinal mode.

Intra-cavity optical parametric oscillator

An optical parametric oscillator comprising: an optical cavity; a semiconductor gain-medium located within the optical cavity, such that together they form a semiconductor laser, and a nonlinear material located within the cavity such that the nonlinear material continuously generates down-converted idler- and signal-waves in response to a pump-wave continuously generated by the semiconductor gain-medium, wherein the pump wave is resonant within the optical cavity and one or other but not both of the down-converted waves is resonant within the pump wave cavity or a further optical cavity. Brewster plates ensure singly resonant optical parametric oscillators and a birefringent filer is used for frequency setting. Coupled cavities allow for setting the photon lifetime in the cavity that relaxation oscillations are prevented.

Laser oscillation apparatus

Provided is a laser oscillation apparatus capable of stabilizing resonance even when finesse of an optical resonator is increased and generating stronger laser light than that of a traditional apparatus by accumulating laser light in the optical resonator. The laser oscillation apparatus includes a laser light source which generates laser light for excitation, a fiber amplifier which generates laser light with a desired wavelength when the laser light generated at the laser light source for excitation is supplied, an optical resonator, an optical isolator which is interposed between the optical resonator and the fiber amplifier and which guides the laser light from the fiber amplifier to one side of the optical resonator while blocking laser light in the opposite direction, a circulation optical path which accelerates resonance as introducing laser light emitted from the other side of the optical resonator and returning the laser light to the optical resonator via the fiber amplifier and the optical isolator, and a modulator which performs amplitude modulation on the laser light in the circulation optical path.

HIGHLY EFFICIENT 3rd HARMONIC GENERATION IN Nd: YAG LASER

The specification and drawings present an apparatus and a method for intra-cavity harmonic generation in lasers such as solid-state lasers using a multi-resonance cavity with meniscus lenses for focusing corresponding wavelength radiation components on non-linear optical elements such as non-linear optical crystals using type I or type II phase-matching for significantly increasing efficiency of the harmonic conversion and output powers of generated harmonics. Using only type I or only type II phase-matching for all non-linear crystals may eliminate the requirement of linear-polarization on the fundamental laser wavelength generation. For example, a highly efficient UV Nd:YAG laser at 355 nm (a third harmonic of the fundamental wavelength of 1064 nm for the Nd:YAG laser) using intra-cavity triple resonance cavity and meniscus lenses has been developed using embodiments described herein.

Method and laser oscillator for the generation of a laser beam

Method and laser oscillator for the generation of a laser beam—According to the invention with a view to adjusting, inside said laser oscillator ( 1 ), the phase of each of the N elementary laser beams (FLE. 1, FLE. 2, FLE.N) generated on the basis of said laser oscillator ( 1 ) in such a way that said elementary laser beams are in phase, the deviation between the phase of an individual elementary laser beam (FLE. 1 ) and the phases of the N−1 other elementary laser beams (FLE. 2, FLE.N) is converted into a level of luminous intensity by means of at least one optical filtering element to which at least a part of each elementary laser beam is directed.

Multi-chip ops-laser

A two-chip OPS laser includes first and second OPS-chips each emitting the same fundamental wavelength in first and second resonators. The first and second resonators are interferometrically combined on a common path terminated by a common end-mirror. The interferometric combination provides for automatic wavelength-locking of the laser, which can eliminate the need for a separate wavelength selective device in the laser.

Resonator-Enhanced Optoelectronic Devices and Methods of Making Same

Optical resonators that are enhanced with photoluminescent phosphors and are designed and configured to output light at one or more wavelengths based on input/pump light, and systems and devices made with such resonators. In some embodiments, the resonators contain multiple optical resonator cavities in combination with one or more photoluminescent phosphor layers or other structures. In other embodiments, the resonators are designed to simultaneously resonate at the input/pump and output wavelengths. The photoluminescent phosphors can be any suitable photoluminescent material, including semiconductor and other materials in quantum-confining structures, such as quantum wells and quantum dots, among others. 1. An optically pumped system , comprising: [ some of said differing layers are designed, configured, and arranged to define multiple reflectors; and', 'said multiple reflectors are located to define multiple resonator cavities; and, 'a stack of multiple layers, wherein differing ones of said multiple layers are composed of differing materials, wherein, 'at least one photoluminescent layer located in at least one of said resonator cavities, wherein said at least one photoluminescent layer is designed to photoluminesce in the presence of the input light., 'an optical resonator responsive to input light and including2. An optically pumped system according to claim 1 , wherein said multiple layers are monolithic with one another.3. An optically pumped system according to claim 1 , wherein said multiple layers are not monolithic with one another.4. An optically pumped system according to claim 1 , wherein each of the multiple reflectors comprises a distributed Bragg reflector.5. An optically pumped system according to claim 1 , wherein each of the multiple reflectors does not comprise a distributed Bragg reflector.6. An optically pumped system according to claim 1 , wherein the reflectivities of the multiple reflectors are similar to one another.7. An optically pumped ...

High-q optical resonator with monolithically integrated waveguide

A ring optical resonator is formed on a substrate. An outer circumferential surface of the resonator substantially confines one or more circumferential resonant optical modes. The resonator is positioned above a void formed in the substrate and is supported above the void by a portion of a material layer on the substrate that extends radially inward above the void from an outer circumferential edge of the void to the outer circumferential surface of the resonator. An optical waveguide can be integrally formed on the substrate and traverses a portion of the material layer above the void. The optical waveguide and the ring optical resonator are arranged and positioned so as to establish evanescent optical coupling between them. Q-factors of 10 8 or more have been achieved with a silica resonator and silicon nitride waveguide integrally formed on a silicon substrate.

LASER DEVICE AND PHOTOACOUSTIC MEASUREMENT DEVICE COMPRISING THE SAME

In a laser device and a photoacoustic measurement device including the laser device, the intensity of light at each wavelength made independently controllable. The laser device includes a laser medium which has oscillation wavelengths at a first wavelength and a second wavelength with higher light emission efficiency than at the first wavelength, an excitation section, a first resonator, a second resonator, a Q-value change unit, and a control section. The control section oscillates light having the first wavelength through Q switching when a first delay time has elapsed after the excitation of the laser medium has been started in a case where the oscillation wavelength is the first wavelength, and oscillates light having the second wavelength through Q switching when a second delay time has elapsed after the excitation of the laser medium has been started in a case where the oscillation wavelength is the second wavelength. 1. A laser device comprising:a solid-state laser medium which has oscillation wavelengths at a first wavelength and a second wavelength with higher light emission efficiency than at the first wavelength;an excitation section which excites the laser medium;a first resonator which is a resonator oscillating light having the first wavelength and has the laser medium on an internal optical path;a second resonator which is a resonator oscillating light having the second wavelength and has a common optical path which is an optical path in common for the first resonator including an optical path, on which the laser medium is disposed;a Q-value change unit which includes at least a Q-value change part disposed on the common optical path and oscillates light having the first wavelength or light having the second wavelength through Q switching; anda control section which controls the excitation section and the Q-value change unit,wherein the control section controls the Q-value change unit to oscillate light having the first wavelength through Q switching ...

DISTRIBUTED COUPLED RESONATOR LASER

A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions. 1. A distributed resonator laser system , comprising: a rear retroreflector having high reflectivity,', 'a laser gain medium and', 'an output retroreflector, having a reflectivity substantially less than that of the rear retroreflector; and', 'a second distributed resonator comprising a first retroreflector and a second retroreflector from which energy is coupled out of said laser system,, 'a first distributed resonator comprisingwherein said first and second distributed resonators are disposed serially such that said output retroreflector of said first distributed resonator is said first retroreflector of said second distributed resonator.2. The distributed resonator laser system according to claim 1 , wherein the distance between said first and second retroreflectors of said second distributed resonator is such that said second distributed resonator reflects light incident at its first retroreflector with high reflectivity in a comb of wavelengths claim 1 , the spacing of said comb of wavelengths being such ...

DISTRIBUTED COUPLED RESONATOR LASER

A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions. 1. A system for transmitting a beam of optical power , comprising:a transmitter having a first resonator comprising a partially reflective mirror and a laser gain medium, such that the transmitter emits laser illumination towards a remote receiver; anda second resonator comprising (i) a first retroreflector comprising a lens and the partially reflective mirror of the transmitter, the lens being disposed at essentially its focal distance in front of the partially reflective mirror, and (ii) a second retroreflector in the receiver,wherein the laser illumination falling on the receiver is retroreflected back towards the transmitter in the form of a single beam comprising a comb of multiple wavelengths propagating between the transmitter and the receiver, the comb of multiple wavelengths being generated by interference of the light of the single beam propagating within the second resonator.2. The system according to wherein the receiver comprises a retroreflective film.3. The system according to wherein the spacing ...

EFFICIENT GENERATION OF SPATIALLY-RESTRUCTURABLE HIGH-ORDER HG-MODES IN A LASER CAVITY

A vertical external cavity surface emitting laser (VECSEL) based system in a linear single cavity configuration is configured to deliver light in higher-order Hermite-Gaussian transverse modes with Watt-level output power. Simultaneous and independent lasing of spatially-restructurable multiple high-order transverse modes that are collinearly-propagating at the output of such laser cavity is facilitated with the use of an optical pumping scheme devised to control positions of location at which the gain medium of the system is pumped (e.g., locations of focal spots of multiple pump beams on the gain-medium chip). An external astigmatic mode converter is utilized to convert such high-order Hermite-Gaussian modes into corresponding Laguerre-Gaussian modes. 1. A laser system , comprising:a linear laser cavity having a laser cavity axis and defined by first and second reflectors;a laser gain medium chip containing said first reflector;the second reflector dimensioned to have a center of curvature of the second reflector at an axial point of the first reflector;multiple pump channels configured to deliver pumping energy to the laser gain medium chip at respectively-corresponding multiple initial locations of a surface of the laser gain medium chip in a fashion that allows for spatially-varying said multiple initial locations; anda mechanism configured to cause, during the operation of the laser system, a change of first and second of said multiple initial locations to respectively-corresponding third and fourth locations.2. The laser system according to claim 1 , further comprising an astigmatic mode converter (AMC) system outside of the laser cavity on the laser cavity axis.3. The laser system according to claim 2 , wherein the AMC system is configured to have at least one of optical elements of the AMC system to be rotated about the laser cavity axis.4. (canceled)5. The laser system according to claim 1 , wherein at least one of the following conditions is satisfied:a) ...

TWO-DIMENSIONAL MULTI-BEAM STABILIZER AND COMBINING SYSTEMS AND METHODS

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques. 120.-. (canceled)21. A method of forming a multi-wavelength beam output , the method comprising:stabilizing beams emitted by a plurality of emitters each to a unique wavelength by introducing each beam to a stabilizing dispersive element that (i) reflects a portion of the beam back to its emitter to stabilize the beam and (ii) transmits the stabilized beam; andtransmitting the stabilized beams to a combining dispersive element, the combining dispersive element combining the stabilized beams into the multi-wavelength beam output.22. The method of claim 21 , wherein claim 21 , for each emitted beam claim 21 , the stabilizing dispersive element comprises a grating claim 21 , a chirped grating claim 21 , a surface grating claim 21 , a volume grating claim 21 , a transmission grating claim 21 , or a prism.23. The method of claim 21 , wherein claim 21 , for each emitted beam claim 21 , the stabilizing dispersive element comprises a diffraction grating.24. The method of claim 21 , wherein the combining dispersive element comprises a grating claim 21 , a chirped grating claim 21 , a surface grating claim 21 , a volume grating claim 21 , a transmission grating claim 21 , or a prism.25. The method of claim 21 , wherein the combining dispersive element comprises a diffraction grating.26. The method of claim 21 , wherein each of the beam emitters comprises a diode laser.27. The method of claim 21 , further comprising collimating each beam after emission thereof by its beam emitter.28. The method of claim 21 , wherein transmitting the stabilized beams to the combining dispersive element comprises converging the stabilized beams toward the combining dispersive element.29. The method of claim 21 , wherein the multi-wavelength beam output is transmitted away from the beam emitters.30. A system for forming a multi-wavelength beam output claim 21 , the ...

Wavelength discriminating slab laser

A CO 2 laser that generates laser-radiation in just one emission band of a CO 2 gas-mixture has resonator mirrors that form an unstable resonator and at least one spectrally-selective element located on the optical axis of the resonator. The spectrally-selective element may be in the form of one or more protruding or recessed surfaces. Spectral-selectivity is enhanced by forming a stable resonator along the optical axis that includes the spectrally-selective element. The CO 2 laser is tunable between emission bands by translating the spectrally-selective element along the optical axis.

TWO-DIMENSIONAL MULTI-BEAM STABILIZER AND COMBINING SYSTEMS AND METHODS

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques. 120-. (canceled)21. A method of stabilizing and combining an array of emitters each emitting a beam , the method comprising:forming a stabilizer cavity wherein each emitter forms a resonator with an external reflective surface to thereby stabilize the beam emitted by each emitter to a unique wavelength, wherein each beam emitted by the array of emitters is introduced to a dispersive element disposed within the resonator, wherein the dispersive element comprises a grating, a chirped grating, a surface grating, a volume grating, a transmission grating, or a prism;transmitting the beams of the stabilizer from the dispersive element into a wavelength combiner; andcombining the beams, within the wavelength combiner, along one dimension to form a multi-wavelength beam output.22. The method of claim 21 , wherein the beams of the stabilizer are transmitted into the wavelength combiner through back facets of the emitters.23. The method of claim 21 , wherein the beams of the stabilizer transmitted into the wavelength combiner do not pass through the emitters before entering the wavelength combiner.24. The method of claim 21 , wherein the wavelength combiner comprises at least one combining optical element.25. The method of claim 21 , wherein the multi-wavelength beam output is transmitted away from the array of emitters.26. The method of claim 21 , wherein the beams of the stabilizer transmitted into the wavelength combiner comprise the zero-order dispersion of the dispersive element.27. The method of claim 21 , wherein the dispersive element disperses the beams along only a single optical axis.28. The method of claim 21 , wherein the dispersive element is the external reflective surface.29. The method of claim 21 , wherein the external reflective surface receives a portion of the beams from the dispersive element to form the resonator.30. The ...

GENERATION OF HIGH-POWER SPATIALLY-RESTRUCTURABLE SPECTRALLY-TUNABLE BEAMS IN A MULTI-ARM-CAVITY VECSEL-BASED LASER SYSTEM

A collinear T-cavity VECSEL system generating intracavity Hermite-Gaussian modes at multiple wavelengths, configured to vary each of these wavelengths individually and independently. A mode converter element and/or an astigmatic mode converter is/are aligned intracavity to reversibly convert the Gaussian modes to HG modes to Laguerre-Gaussian modes, the latter forming the system output having any of the wavelengths provided by the spectrum resulting from nonlinear frequency-mixing intracavity (including generation of UV, visible, mid-IR light). The laser system delivers Watt-level output power in tunable high-order transverse mode distribution. 1. A laser source comprising:a laser cavity network including first and second spatially-distinct cavity arms and a collinear portion, wherein the first and second spatially-distinct cavity arms share the collinear portion, a corresponding gain medium that includes one of (i) a VECSEL-based laser gain medium, (ii) a solid-state gain medium, and (iii) a fiber amplifier and that is configured to provide amplification of light at a corresponding wavelength;', 'and', 'at least one of a first optical system, disposed across an axis of the at least one of the first and second cavity arms to either refract or reflect light incident thereon while transforming a transverse distribution of said light that has traversed it, and', 'a second optical system, disposed across said axis between the corresponding gain medium and the collinear portion and characterized by optical losses at the corresponding wavelength;, 'at least one of the first and second cavity arms containing, intracavity,'} a first transverse mode distribution in a first portion of the laser cavity network between the corresponding gain medium and the second optical system,', 'a second transverse mode distribution in a second portion of the laser cavity network between the second optical system and the collinear portion, and', 'a third transverse mode distribution in a ...

UNSTABLE IMAGING RESONATOR

In one aspect a power amplifier comprises a first plurality of laser disks disposed in a first vertical plane and a second plurality of laser disks disposed in a second vertical plane, opposite the first vertical plane, wherein the plurality of laser disks are disposed in a central horizontal plane, and a first plurality of reflecting mirrors disposed in the first vertical plane and a second plurality of reflecting mirrors disposed in the second vertical plane, wherein a first set of reflecting are disposed in a lower horizontal plane and a second set of reflecting mirrors are disposed in an upper horizontal plane, wherein respective laser disks and reflecting mirrors adjacent along an optical axis are positioned to provide a 1:1 imaging system therebetween. Other aspects may be described. 1. An unstable imaging resonator , comprising:a feedback mirror and a primary mirror which provide unstable resonator oscillation of a laser signal which propagates along an optical axis between the feedback mirror and the primary mirror;a first plurality of laser disks disposed in a first vertical plane and a second plurality of laser disks disposed in a second vertical plane, opposite the first vertical plane, wherein the plurality of laser disks are disposed in a central horizontal plane; anda first plurality of reflecting mirrors disposed in the first vertical plane and a second plurality of reflecting mirrors disposed in the second vertical plane, wherein a first set of reflecting mirrors are disposed in a lower horizontal plane and a second set of reflecting mirrors are disposed in an upper horizontal plane;wherein respective laser disks and reflecting mirrors adjacent in the optical axis are positioned to provide a 1:1 imaging system therebetween.2. The unstable imaging resonator of claim 1 , wherein:the first vertical plane is disposed in an image plane of the second plurality of laser disks and the second plurality of reflecting mirrors; andthe second vertical plane is ...

DISTRIBUTED COUPLED RESONATOR LASER

A laser system involving coupled distributed resonators disposed serially, with the lasing gain medium located in the main resonator and the output of that resonator being directed into a free space resonator, such that the main resonator output mirror is effectively the free space resonator. The distributed resonators end mirrors are retroreflectors. Interference occurs between light traveling towards the remote mirror of the free space resonator and light reflected therefrom, generating regions of high reflectivity. The coupling of the free space resonator to the regions of high reflectivity of the free space resonator enables the first resonator to lase efficiently, even though the true reflectivity of the main resonator output mirror outside of those regions is insufficient to enable efficient lasing, if at all. This coupled resonator structure enables lasing to occur with a high field of view and the high gain engendered by the high reflectivity regions. 1: A distributed resonator laser system , comprising:a first distributed resonator comprising:a rear retroreflector having high reflectivity,a laser gain medium and an output retroreflector, having a reflectivity substantially less than that of the rear retroreflector; anda second distributed resonator comprising a first retroreflector and a second retroreflector from which energy is coupled out of said laser system,wherein said first and second distributed resonators are disposed serially such that said output retroreflector of said first distributed resonator is said first retroreflector of said second distributed resonator.2: The distributed resonator laser system according to claim 1 , wherein the distance between said first and second retroreflectors of said second distributed resonator is such that said second distributed resonator reflects light incident at its first retroreflector with high reflectivity in a comb of wavelengths claim 1 , the spacing of said comb of wavelengths being such that a ...

Laser and method of controlling laser

A laser includes first through fourth gain media, first through fifth wavelength selective filters, and first through fourth wavelength selective mirrors. The first through fourth gain media emit laser beams of different wavelengths. Each of the first through fifth wavelength selective filters includes first through fourth input/output ports. The fifth wavelength selective filter selects light of periodic wavelengths. The first through fourth wavelength selective filters have their respective first input/output ports connected to the first through fourth gain media, respectively, have their respective fourth input/output ports connected to the first through fourth wavelength selective mirrors, respectively, and have their respective second input/output ports connected to the first through fourth input/output ports, respectively, of the fifth wavelength selective filter.

GENERATION OF HIGH-POWER SPATIALLY-RESTRUCTURABLE SPECTRALLY-TUNABLE BEAMS IN A MULTI-ARM-CAVITY VECSEL-BASED LASER SYSTEM

A collinear T-cavity VECSEL system generating intracavity Hermite-Gaussian modes at multiple wavelengths, configured to vary each of these wavelengths individually and independently. A mode converter element and/or an astigmatic mode converter is/are aligned intracavity to reversibly convert the Gaussian modes to HG modes to Laguerre-Gaussian modes, the latter forming the system output having any of the wavelengths provided by the spectrum resulting from nonlinear frequency-mixing intracavity (including generation of UV, visible, mid-IR light). The laser system delivers Watt-level output power in tunable high-order transverse mode distribution. 1. A laser source comprising:a laser cavity network including first and second spatially-distinct cavity arms and a collinear portion, wherein the first and second spatially-distinct cavity arms share the collinear portion, a corresponding gain medium that includes one of (i) a VECSEL-based laser gain medium, (ii) a solid-state gain medium, and (iii) a fiber amplifier, and that is configured to provide amplification of light at a corresponding wavelength;', 'and', 'at least one of a first transverse light mode converter optical system, disposed across an axis of the at least one of the first and second cavity arms to either refract or reflect light incident thereon, and a second transverse light mode converter optical system disposed across said axis between the corresponding gain medium and a terminus of the collinear portion;, 'at least one of the first and second cavity arms containing'}wherein said laser source is configured to maintain intracavity generation of light at the corresponding wavelength such that a first transverse light mode distribution is formed between the second transverse light mode converter and the collinear portion and a second transverse light mode distribution is formed in a remaining portion of the laser cavity network, andwherein the first transverse light mode distribution and the second ...

High Power Solid-State Laser With Replaceable Module For UV Generation

There is provided an intracavity module () arranged to be replaceably-mounted inside a laser resonator cavity. The intracavity module comprises a first optical element (), a second optical element () and a frequency conversion element (). The frequency conversions element is arranged to receive light at a first frequency and output light at a second frequency. The first optical element is at least partially transmissive at the first frequency. The frequency conversion element is encapsulated by at least the first optical element and the second optical element. The laser resonator may comprise a HR end mirror (), a Q-switch (), a Nd:YAG laser gain medium (), a mirror () being transmissive at the laser fundamental and reflective at its second-harmonic, a second-harmonic generating non-linear crystal (), the first optical element () being a mirror reflective at the third-harmonic and transmissive at the fundamental and the SH, a non-linear crystal () for generating the third-harmonic and a mirror () reflecting laser fundamental and SH and transmitting the third-harmonic. The module () may be translated to provide a non-damage part of the facet of the third-harmonic generating crystal () or replaced in case this non-linear-crystal can not be used any more to extend the lifetime of the laser. 1. An intracavity module arranged to replaceably-mount inside a laser resonator cavity , the intracavity module comprising:a first optical element;a second optical element; anda frequency conversion element arranged to receive light at a first frequency and output light at a second frequency, wherein the first optical element is at least partially transmissive at the first frequency; andwherein the frequency conversion element is encapsulated by at least the first optical element and the second optical element.2. An intracavity module as claimed in wherein the first frequency is the fundamental frequency of the laser resonator cavity and/or a higher frequency harmonic of the ...

Ultrashort Pulse Fiber Laser

The invention is a passively mode-locked ultrashort pulse fiber laser for generating ultrashort laser pulses, including a resonator in a figure-of-eight configuration, wherein the resonator has a main ring and a secondary ring optically coupled thereto designed as a non-linear Sagnac interferometer, and wherein the main ring and the secondary ring are constructed of polarization-maintaining optical fibers, and the main ring and/or secondary ring have a fiber section designed as a laser-active medium, wherein the laser-active medium is optically pumped through an externally-coupled pump light source which is also comprised, wherein the ultrashort pulse fiber laser is developed in that a separate optical unit is provided in the resonator as a dispersion compensation unit for compensating a group delay dispersion of the ultrashort laser pulses.

System for spatial recombination of ultrashort laser pulses by means of a diffractive element

A system based on recombination by superposition using a diffractive optical element DOE to combine the beams is provided. An optical diffractive assembly is placed upstream of a diffractive optical element to make it possible, via an appropriate imaging system, to optimize the combining efficiency in the ultra-short pulse regime.

Method and generator for generating ultra-short light pulses

This invention relates to the field of laser technology and more particularly to the ultra-short pulse generation methods and generators. One round trip of the ultra-short light pulse formation inside a generator optical loop comprises these steps: amplification of the light pulse, spectral broadening of the amplified light pulse due to the optical Kerr effect inside the optically transparent medium, selection of the predeterminated spectral components of the spectrally broadened light pulses by using the first spectrally-sensitive optical element, then again follows amplification of the selected light pulses, spectral broadening of the amplified light pulse due to the optical Kerr effect inside the optically transparent medium and selection of the predeterminated spectral components of the spectrally broadened light pulses by using the second spectrally-sensitive optical element, where spectral components of the light pulses selected using the first spectrally-sensitive optical element are different than the spectral components of the light pulses selected using the second spectrally-sensitive optical element.

OPEN-LOOP WAVELENGTH SELECTIVE EXTERNAL RESONATOR AND BEAM COMBINING SYSTEM

A variety of dense wavelength beam combining (DWBC) apparatuses are described herein that combine a plurality of individual input beams into a single output beam. DWBC apparatuses contemplated herein are open-loop configurations, i.e. configurations where the wavelength selective optics of a feedback generation system are decoupled from abeam combining system that combines a plurality of input beams each having a wavelength selected from a range of different wavelengths. Specifically, each constituent beam of the combined output beam produced by the beam combining system traverses an optical path that does not include the wavelength-selective optics of the feedback generation system. DWBC apparatuses contemplated herein further provide for matching the wavelength-dependent angular dispersion functions of optics of the feedback generation system with the wavelength-dependent angular dispersion functions of optics of the beam combining system. 1. An external cavity laser apparatus comprising:a plurality of beam emitters that collectively emit a plurality of external cavity input beams each having a primary component with an initial linear polarization state;an angular dispersive output beam combining optic;a beam splitter disposed in an optical path from the plurality of beam emitters to the angular dispersive output beam combining optic, the beam splitter being configured to extract, from the plurality of external cavity input beams, a plurality of first extracted component beams and to reflect the plurality of first extracted component beams into a feedback branch, the feedback branch being disposed external to the optical path from the plurality of beam emitters to the angular dispersive output beam combining optic;a birefringent optic disposed in an optical path between the plurality of beam emitters and the beam splitter;a first position-to-angle transform optic disposed in the optical path from the plurality of beam emitters to the angular dispersive output beam ...

Laser device

A laser device for outputting filtered light pulses for inducing coherent Raman scattering in a sample. The laser device comprises a first optical cavity comprising a first gain medium; and a second optical cavity comprising a second gain medium different to the first gain medium. The first gain medium and the second gain medium are each excitable by a pump light source to generate light at respective different ranges of wavelengths. A synchronizer is optically coupled to both the first optical cavity and the second optical cavity. The synchronizer is configured to synchronize and mode-lock light from the first optical cavity and the second optical cavity. The laser device also includes a first optical filter and a second optical filter. The first optical filter and the second optical filter are configured to filter the light from the first optical cavity and the second optical cavity respectively in order to output first filtered light pulses at a first predetermined range of wavelengths and second filtered light pulses at a second predetermined range of wavelengths.

EXTERNAL OPTICAL FEEDBACK ELEMENT FOR TUNING A MULTI-WAVELENGTH GAS LASER

An external optical feedback element () for tuning an output beam of a gas laser () having multiple wavelengths includes a partially reflective optical element () positioned on a beam path of the output beam () outside of an internal optical cavity of the gas laser (), and a stage () to support the optical element and adjust rotation, horizontal tilt angle, and vertical tilt angle of the optical element with respect to the beam path. The output beam () is partially reflected at the optical element () and fed back into the internal optical cavity of the gas laser (), with the intensity varying for multiple wavelengths and adjusted by changing rotation, horizontal tilt angle and vertical tilt angle of the optical element. Thereby, a variable feedback of the output beam into the internal optical cavity of the gas laser is provided, which leads to a selective output wavelength of the gas laser, either at a single line or at multiple lines simultaneously. This setup may allow to control the wavelength of a commercial CO2 gas laser without a modification of the laser itself by adding a coupled cavity with a wavelength selective element like a grating to the given gas laser resonator. 1. An external optical feedback element for tuning an output beam of a gas laser having a plurality of wavelengths , comprising:a partially reflecting optical element positioned on a beam path of the output beam outside of an internal optical cavity of the gas laser; anda stage to support the optical element and adjust a rotation, a horizontal tilt angle, and a vertical tilt angle of the optical element with respect to the beam path of the output beam; the intensity of the reflected beam varies for the plurality of wavelengths,', 'the intensity of the reflected beam for each of the plurality of wavelengths is adjusted by changing the rotation, the horizontal tilt angle, and the vertical tilt angle of the optical element, and', 'thereby a wavelength is selected at which the output beam is fed ...

LASER ARRANGEMENT FOR GENERATING A TWICE FREQUENCY CONVERTED LASER RADIATION

A laser arrangement for generating a twice frequency-converted laser radiation is disclosed, comprising the following: an active medium which by radiation of pump light generates a first laser radiation with a first frequency; a first laser resonator inside of which the first laser radiation circulates while resonating; a first non-linear crystal which is arranged inside of the first laser resonator and is provided and established to convert the first laser radiation into a second laser radiation with a second frequency that is higher than the first frequency; a second laser resonator inside of which the second laser radiation circulates while resonating; a second non-linear crystal which is arranged inside of the second laser resonator and is provided and established to convert the second laser radiation into a third laser radiation with a third frequency that is higher than the second frequency, wherein the first laser resonator and the second laser resonator are arranged relative to each other such that they have a joint optical section through which both the first laser radiation, circulating in the first laser resonator, and the second laser radiation, circulating in the second laser resonator, radiate. The first laser resonator and the active medium are designed and arranged such that the first laser radiation consists of precisely two adjacent longitudinal modes with two frequencies, wherein the first frequency of the first laser radiation is a sum frequency of these two frequencies, and in that the second laser resonator has an optical path length which allows for a resonance of merely a single longitudinal mode of the second laser radiation. 1. A laser arrangement for generating a twice frequency-converted laser radiation , havingan active medium, which by radiation of pump light generates a first laser radiation with a first frequency,a first laser resonator, inside of which the first laser radiation circulates while resonating,a first non-linear crystal, ...

Ring laser sensor

The present invention is suitable for the technical field of sensing, and provides a ring laser sensor comprising a pump source, a common section, and a reference section and a detection section, the common section is provided with a gain medium, the common section and the reference section form a first ring laser resonator, and the common section and the detection section form a second ring laser resonator, lasers are transmitted oppositely in the first ring laser resonator and the second ring laser resonator, the detection section is provided with a sensing element capable of causing an optical path difference; the common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit. In the present invention, two ring laser resonators with opposite transmission directions is provided, the detection section is provided with the sensing element, and because the frequencies of the laser are sensitive to the changes of the optical paths in the resonators, the sensitivity and accuracy of the sensor are high, and the two resonators of the sensor have common optical path, such that the sensor has good anti jamming capacity and is suitable for measuring the small changes in a variety of physical quantities.

LONG WAVELENGTH INFRARED DETECTION AND IMAGING WITH LONG WAVELENGTH INFRARED SOURCE

An infrared detection system comprises the following elements. A laser source provides radiation for illuminating a target (). This radiation is tuned to at least one wavelength in the fingerprint region of the infrared spectrum. A detector () detects radiation backscattered from the target (). An analyser determines from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present. An associated detection method is also provided. In embodiments, the laser source is tunable over a plurality of wavelengths, and the detector comprises a hyperspectral imaging system. The laser source may be an optical parametric device has a laser gain medium for generating a pump beam in a pump laser cavity, a pump laser source and a nonlinear medium comprising a ZnGeP(ZGP) crystal. On stimulation by the pump beam, the ZnGeP(ZGP) crystal is adapted to generate a signal beam having a wavelength in a fingerprint region of the spectrum and an idler beam having a wavelength in the mid-infrared region of the spectrum. The laser gain medium and the ZnGeP(ZGP) crystal are located in the pump wave cavity. 1. An infrared detection system , comprising:a laser source providing radiation for illuminating a target, wherein the output of the laser source excludes a broadband output and is tuned to at least one wavelength in the fingerprint region of the infrared spectrum;a detector configured to detect radiation backscattered from the target, wherein the detector comprises an imaging system;an analyser adapted to match detected radiation signals against predetermined spectra to determine from at least the presence or absence of detected signal in said at least one wavelength whether a predetermined volatile compound is present; andan imager adapted to provide an image of the target including an indication of whether the predetermined volatile compound is present.2. The infrared detection system as claimed in claim 1 , ...

Laser apparatus

A laser apparatus according to the present invention may comprise: a plurality of reflection mirrors which form a resonance path so as for light to be amplified by an induced emission; a medium having a first surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and absorbs energy from a light source and amplifies and emits the light; and a saturable absorber having a second surface which forms a vertical surface with respect to the resonance path, and a second interface which does not form a vertical surface with respect to the resonance path, and generates ultrashort pulses. The laser apparatus according to the present invention has the effects of cutting a saturable absorber having a specific crystallographic axis to thereby make polarization capacity in one direction advantageous and minimize propagation loss. In addition, the laser apparatus according to the present invention has the effect of maximizing transmittivity maintenance capacity of polarization orientation in one direction by arranging a medium and a saturable medium so as to have a specific inclined plane.

TWO-DIMENSIONAL MULTI-BEAM STABILIZER AND COMBINING SYSTEMS AND METHODS

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques. 120.-. (canceled)21. A multi-beam stabilizer and combining system comprising: an array of beam emitters each (i) having front and back facets and (ii) emitting a beam from the front facet,', 'one or more first optical elements (i) having power along the dispersive dimension of the wavelength stabilizer and (ii) arranged to receive the emitted beams and parallelize chief rays of the emitted beams, and', 'a first dispersive element arranged to receive the beams from the one or more first optical elements and disperse the beams into at least two orders, wherein one of the orders is reflected back to the array of beam emitters by a feedback element, thereby forming a resonator between the back facet of each beam emitter and the feedback element that stabilizes the beam emitted by each beam emitter to a unique wavelength; and, 'a wavelength stabilizer having a dispersive dimension and a non-dispersive dimension, the wavelength stabilizer comprising one or more second optical elements, different from the one or more first optical elements, arranged to receive the wavelength-stabilized beams and cause the beams to converge along a beam-combining dimension, and', 'a second dispersive element, different from the first dispersive element, positioned along a beam-combining dimension, to receive the plurality of converging beams, and transmit the beams as a multi-wavelength output., 'a wavelength combiner having a dispersive dimension and a non-dispersive dimension, the wavelength combiner comprising22. The system of claim 21 , wherein the first dispersive element comprises a grating claim 21 , a chirped grating claim 21 , a surface grating claim 21 , a volume grating claim 21 , a transmission grating claim 21 , or a prism.23. The system of claim 21 , wherein the one or more first optical elements are telecentric.24. The system of claim 21 , further ...

DEVICE FOR COMBINING AT LEAST TWO LASER BEAMS

A device for combining at least two input laser beams having different spectral components. At least one pre-compensation unit for the at least two input laser beams has a diffractive optical unit which expands the input laser beam into an intermediate beam bundle in which the spectral components are spatially arranged so as to be adjacent to one another with increasing wavelength. A combination unit has at least a first diffractive optical element and a second diffractive optical element, the combination unit being aligned with the pre-compensation unit in such a way that the first diffractive optical element converts an intermediate beam bundle into a convergent beam bundle having a beam waist, the beam waist lying on the second diffractive element, and the second diffractive optical element being designed in this way that all incident spectral components are diffracted in a common radiation direction.

SHORT-PULSE LASER SYSTEM

A short-pulse laser system for generating electromagnetic pulses includes: a first resonator having a first beam path and a first resonator length; a second resonator having a second beam path and a second resonator length; and an amplification medium. The amplification medium is arranged both in the first beam path of the first resonator and in the second beam path of the second resonator. The system and method for generating optical pulses enables the generation of a first and a second pulse with an adjustable time delay at high sampling rates. The first resonator of the system is designed such that it supports precisely one first polarization state of the electromagnetic pulses and the second resonator is designed such that it supports precisely one second polarization state. The first and second polarization states are orthogonal to one another and designed with lengths that are variable relative to one another. 1. A short-pulse laser system for generating electromagnetic pulses comprising:a first resonator having a first beam path and a first resonator length,a second resonator having a second beam path and a second resonator length, andan amplification medium,wherein the amplification medium is arranged both in the first beam path of the first resonator so that it amplifies electromagnetic pulses in the first resonator and also in the second beam path of the second resonator so that it amplifies electromagnetic pulses in the second resonator,wherein the first resonator is so adapted that it supports precisely one first polarization state of the electromagnetic pulses and the second resonator is so adapted that it supports precisely one second polarization state, wherein the first and second polarization states are orthogonal to each other andwherein the first and second resonators are so adapted that the first and the second resonator lengths are variable relative to each other.2. A short-pulse laser system for generating electromagnetic pulses according to ...

Excimer laser with uniform beam

Fine-structure in the transverse mode of an excimer laser beam is minimized by having a plurality of resonator mirrors located at each end of a linear excimer laser. At one end, a highly-reflective end mirror and a partially-reflective end mirror are inclined at small angle with respect to each other. At the other end, two output-coupling mirrors are inclined at a small angle with respect to each other. This arrangement of resonator mirrors generates a composite laser beam that blurs any fine structure.

Two-Dimensional Multi-beam Stabilizer and Combining Systems and Methods

A system and method for stabilizing and combining multiple emitted beams into a single system using both WBC and WDM techniques.

MULTI-PASS SLAB LASER WITH INTERNAL BEAM SHAPING

The laser resonator includes a first resonator wall, a second resonator wall that is substantially parallel to the first resonator wall and is separated from the first resonator wall in a first transverse direction thereby defining a gap having a gap width between the first and second resonator walls, and at least two laser cavity mirrors. The laser cavity mirrors are arranged to allow an intra-cavity laser beam to reflect from the output coupling mirror thereby forming a first beam spot on the output coupling mirror. The first curved mirror has a radius of curvature such that the reflection of the intra-cavity laser beam from the first curved mirror causes the first beam spot on the output coupling mirror to have a substantially symmetric shape. 1. A laser resonator comprising:a first resonator wall;a second resonator wall that is substantially parallel to the first resonator wall and is separated from the first resonator wall in a first transverse direction thereby defining a gap having a gap width between the first and second resonator walls; an output coupling mirror disposed at a first end of the first and second resonator walls;', 'a first curved mirror disposed at the first end of the first and second resonator walls;', 'a folding mirror disposed at the second end of the first and second resonator walls; and', 'a satellite mirror disposed at the first end of the first and second resonator walls, and', 'wherein the first curved mirror is disposed at the first end of the first and second resonator walls and is disposed between the output coupling mirror and the satellite mirror,, 'a plurality of laser cavity mirrors comprisingwherein the plurality of laser cavity mirrors are arranged to allow an intra-cavity laser beam to reflect from the output coupling mirror thereby forming a first beam spot on the output coupling mirror;wherein the plurality of laser cavity mirrors are arranged to allow the intra-cavity laser beam to reflect from the first curved mirror ...

LASER LIGHT SOURCE UNIT, AND METHOD FOR GENERATING LASER LIGHT FOR VEHICLES

A laser light source unit for vehicles is provided, having a resonator containing a first end mirror and a second end mirror. Between the two, an active laser medium is arranged. The laser light source unit further has a pump device for generating a pump radiation which can be introduced via the first end mirror into the resonator. The pump radiation corresponds to a first wavelength and the active laser medium is configured such that laser light of the first wavelength and/or of a second wavelength and/or of a third wavelength can be radiated. An intermediate mirror and a third end mirror assigned to the same are provided. The intermediate mirror is configured in such a way that the radiation of the second wavelength is reflected, and the radiation of the third wavelength is transmitted, by means of said intermediate mirror. The third end mirror is configured in such a way that the radiation of the second wavelength is reflected, a color control module is provided, which acts on the radiation of the second wavelength and/or the radiation of the third wavelength in such a way that an intensity of the stimulated emission of the radiation of the second wavelength is adjusted to the radiation of the third wavelength, or vice versa. 1. A laser light source unit for vehicles , the laser light source unit comprising:a resonator containing a first end mirror and a second end mirror, between which an active laser medium is arranged;a pump device for generating a pump radiation introduced via the first end mirror into the resonator, wherein the pump radiation corresponds to a first wavelength and wherein the active laser medium is configured such that laser light of at least one of the first wavelength, a second wavelength, and a third wavelength is radiated radiated;an intermediate mirror and a third end mirror assigned to the intermediate mirror, wherein the intermediate mirror is configured in such a way that the radiation of the second wavelength is reflected, and the ...

LASER SYSTEM

A laser system is described, the laser system comprising: an optical cavity defined by at least first and second at least partially reflecting elements; and a gain system. The gain system comprising at least first and second gain media located within the optical cavity. The first and second gain media are configured to generate optical radiation of at least first and second wavelength ranges in response to pumping energy. 136-. (canceled)37. A laser system , comprising:an optical cavity defined by at least first and second at least partially reflecting elements; anda gain system including at least first and second gain media located within the optical cavity, the first and second gain media configured to generate optical radiation of at least first and second wavelength ranges in response to pumping energy.38. The laser system of claim 37 , further comprising a wavelength conversion unit configured for generating appropriate interaction of light of the at least first or and second wavelength ranges to thereby generate light of at least a third wavelength range.39. The laser system of claim 38 , wherein the wavelength conversion unit includes an intra-cavity conversion unit or an extra-cavity conversion unit.40. The laser system of claim 38 , wherein the wavelength conversion unit is configured to provide nonlinear wavelength conversion in response to optical radiation of the at least first or and second wavelength ranges claim 38 , the nonlinear wavelength conversion including at least one of the following: harmonic generation claim 38 , wave mixing claim 38 , sum wavelength mixing claim 38 , difference wavelength mixing claim 38 , three-wave mixing claim 38 , four wavelength mixing claim 38 , high order wavelength mixing claim 38 , optical parametric oscillator (OPO) claim 38 , intra-cavity OPO (IOPO) claim 38 , or optical parametric amplifier (OPA).41. The laser system of claim 38 , wherein the wavelength conversion unit is configured to provide nonlinear ...

Excimer laser composite cavity

Disclosed is an excimer laser composite cavity, comprising a laser discharge cavity, a laser output module, a line-width narrowing module, and a laser amplification module. The laser discharge cavity contains work gas for generating laser when it is activated by an excitation source. The laser discharge cavity, the laser output module, and the line-width narrowing module constitute a line-width narrowing cavity configured to narrow down a line-width of the laser generated by the work gas. The laser discharge cavity, the laser output module, and the laser amplification module constitute an amplification cavity configured to amplify power of the laser with the line-width having been narrowed down by the line-width narrowing cavity.

LASER SYSTEMS AND METHODS

Laser systems and methods are disclosed. One laser system comprises: a plurality of laser resonators, each resonator being operable to discharge an input laser beam; a relay assembly including at least one curved reflective surface that redirects each input laser beam, and reduces a beam size of the redirected beam; a galvo including a curved reflective surface that receives each redirected beam, and outputs a combined laser beam at power level greater than a power level of each laser input beam; and a coupling assembly that reduces spherical aberrations in the combined laser beam, and directs the combined laser beam into an optical fiber. In this system, the combined laser beam may have a maximum beam parameter product lower than a minimum beam parameter product of the optical fiber. Related systems and methods are also disclosed. 1. A laser system comprising:a plurality of laser resonators, each resonator being operable to discharge an input laser beam;a relay assembly including at least one curved reflective surface that redirects each input laser beam, and reduces a beam size of the redirected beam;a galvo including a curved reflective surface that receives each redirected beam, and outputs a combined laser beam at power level greater than a power level of each laser input beam; anda coupling assembly that reduces spherical aberrations in the combined laser beam, and directs the combined laser beam into an optical fiber,wherein the combined laser beam has a maximum beam parameter product lower than a minimum beam parameter product of the optical fiber.2. The laser system of claim 1 , wherein the at least one curved reflective surface of the relay assembly has a first curvature radius claim 1 , the curved reflective surface of the galvo has a second curvature radius claim 1 , and the first and second curvatures are different.3. The laser system of claim 2 , wherein the first curvature radius is greater than the second curvature radius.4. The laser system of claim ...

Monolithic microchip laser with intracavity beam combining and sum frequency or difference frequency mixing

A method for producing low-noise laser output (195) at various wavelengths and/or in various operation modes in a monolithic microchip laser (100) comprises schemes of generating two fundamental beams (165, 175) in separate cavities, precise intracavity beam combination based on the walk-off effect in birefringent crystal (180), and wavelength conversion in nonlinear optical crystals (190). The fundamental beams (165, 175) are produced from light sources (160, 170) selected upon the desired wavelengths, polarizations, and other features related to the laser output (195). Low- noise laser devices operated in SLM or with spectra of flat-top or desired bandwidths are constructed according to the method. High-volume fabrication is feasible. Apparatus of compact size and efficient frequency conversion is demonstrated with various configurations including those for generating low-noise 491 nm laser, as a replacement of Argon ion laser.

All-fiber integrated high power coherent beam combination

A fiber laser amplifier system including a master oscillator that generates a signal beam. A splitter splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples all of the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. An end cap is optically coupled to an output end of the tapered fiber bundle to expand the output beam.

谐振器增强型光电装置及其制造方法

本发明公开了光谐振器，通过采用光致发光荧光粉使该光谐振器性能提高，该光谐振器被设计和配置成，根据输入/泵浦光输出一种或多种波长的光。还公开了由这种谐振器制造的系统和装置。在某些实施例中，谐振器含有多个光学谐振腔，光学谐振腔与一层和多层光致发光荧光粉层或其他结构相组合。在其他实施例中，谐振器被设计成在输入/泵浦波长和输出波长处同时谐振。光致发光荧光粉可以是任何合适的光致发光材料，包括量子限制结构(如量子阱和量子点等)中的半导体和其他材料。

All-fiber integrated high power coherent beam combination

A fiber laser amplifier system including a master oscillator that generates a signal beam. A splitter splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples all of the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. An end cap is optically coupled to an output end of the tapered fiber bundle to expand the output beam.

Resonator-enhanced optoelectronic devices and methods of making same

Optical resonators that are enhanced with photoluminescent phosphors and are designed and configured to output light at one or more wavelengths based on input/pump light, and systems and devices made with such resonators. In some embodiments, the resonators contain multiple optical resonator cavities in combination with one or more photoluminescent phosphor layers or other structures. In other embodiments, the resonators are designed to simultaneously resonate at the input/pump and output wavelengths. The photoluminescent phosphors can be any suitable photoluminescent material, including semiconductor and other materials in quantum-confining structures, such as quantum wells and quantum dots, among others.

Resonator-enhanced optoelectronic devices and methods of making same

Optical resonators that are enhanced with photoluminescent phosphors and are designed and configured to output light at one or more wavelengths based on input/pump light, and systems and devices made with such resonators. In some embodiments, the resonators contain multiple optical resonator cavities in combination with one or more photoluminescent phosphor layers or other structures. In other embodiments, the resonators are designed to simultaneously resonate at the input/pump and output wavelengths. The photoluminescent phosphors can be any suitable photoluminescent material, including semiconductor and other materials in quantum-confining structures, such as quantum wells and quantum dots, among others.

모노리식 프리즘 어셈블리를 장착한 외부 공동 반도체 레이저

축소, 외부 공동, 필터-잠금 레이저는 다이오드 레이저와 같이, 반도체 광학 증폭기 및 외부 공진 공동 내에 이격된 모노리식 프리즘 어셈블리를 갖는다. 상기 모노리식 프리즘 어셈블리는 기운, 즉, 상기 외부 공동 내의 레이저 광 경로에 수직이 아닌 방향으로 된 박막 패브리-페로 간섭 필터를 포함한 투명한 기판을 포함한다. 상기 광학 장치는 단단한 내성 내에서 유지된 재현성있는 스펙트랄 성능 특성을 갖는, 유리하게 작은 크기로 경제적으로 대량 생산될 수 있다. 매우 유리한 적용은 각각의 다중 채널에 대하여 밀접하게 배치된 파장 서브범위를 요구하는 밀파 분해 다중화 시스템을 포함한다. 온도 및 습도 변화 등에 대한 고 파장 안정성이 성취될 수 있다.

一种基于光学反馈产生的重复频率可调光频梳

本发明提供了一种基于光学反馈产生的重复频率可调光频梳。所述光频梳包括单频激光谐振腔、波分复用器、单模半导体泵浦光源、光环行器、第一光纤耦合器、第二光纤耦合器、光电探测器、高稳定信号源、误差信号处理系统、激光频率调制装置、可调激光延迟模块。本发明利用可调激光延迟模块对单频激光进行延时处理，并通过光环形器实现光学反馈注入到谐振腔中，产生一系列频率间隔相等并且可调的激光纵模。同时结合高稳定信号源、误差信号处理系统和激光频率调制装置实现激光频率锁定，产生激光光频梳。该发明以一种简单实用的方法获得重复频率可调的激光光频梳，在光纤传感以及原子和分子光谱学等领域有着广阔的应用前景和巨大的应用价值。

Laser light source device

Semiconductor laser and its operating method

Light pulse amplification method

The method involves coupling a sequence of timewise equidistant input light pulses (21) produced by a pulse laser, in such way into an external resonator device (1), free of an amplification medium, with at least two resonator mirrors (11-14) defining a light path (10) with a predetermined resonator length, that the coupled input light pulses are linearly and successively superimposed in the resonator to at least one circulating light pulse. The method involves coupling a sequence of timewise equidistant input light pulses (21) produced by a pulse laser, in such way into an external resonator device (1), free of an amplification medium, with at least two resonator mirrors (11-14) defining a light path (10) with a predetermined resonator length, that the coupled input light pulses are linearly and successively superimposed in the resonator to at least one circulating light pulse. A decoupling of the circulating light pulse from the resonator, as output light pulse (31) results over a modulator element (15), with which the at least one output light pulse is directed out of the resonator, after it has reached a predetermined minimum energy. An Independent claim is included for a corresponding amplification arrangement.

Multiple-cavity semiconductor laser capable of generating ultrashort light pulse train with ultrahigh repetition rate

A semiconductor laser is provided which is capable of generating a train of ultrashort light pulses with an ultrahigh repetition frequency and which is useful in optical communications and optical information processing. The semiconductor laser is a mode-locked semiconductor laser which has two resonator cavities which are formed by two facets and a distributed feedback structure between these two facets. The length of the resonator cavity formed between one facet and the distributed feedback structure is 1/m (where m is an integer) of the length of the resonator cavity formed by the other facet and the distributed feedback structure. A saturable absorption region and a high-frequency modulation region are provided within the longer of the resonator cavities. By making the high-frequency modulation frequency be equal to the round trip frequency of the light within the longer resonator cavity, mode-locked operation is achieved. Because of the linking of the shorter resonator cavity, a train of light pulses having a repetition frequency of m times the mode-locked pulse train frequency is obtained.

Method and device for generating phase-coherent light pulses

For the generation of amplified, phase-coherent light pulses, a sequence of phase-coherent, equidistant input light pulses (21) is coupled into a resonator device (1) with at least two resonator mirrors (11, 14), forming a light path (10) with a predetermined resonator length, in such a way that the coupled in input light pulses in the resonator device are linearly superimposed in succession to form at least one circulating light pulse, whereby the circulating light pulse is coupled out of the resonator device as an output light pulse (31) as soon as the circulating light pulse has reached a preset minimum level of energy.

Multi-wavelength laser device

本发明的目的在于，提供一种多波长激光装置，能够以简便的结构得到重叠于同一轴上的多个波长变换后的光，而且能够缓解对重叠的光的限制。多波长激光装置具有：激光光源(10)，其射出基波长彼此不同的多个激光(20)；色散元件(30)，其按照波长和入射方向变更从激光光源(10)射出的激光(20)的行进方向，以重叠于同一轴上的状态出射；以及波长变换元件(40)，其具有周期性地形成的极化反转区域和非极化反转区域，对从色散元件(30)出射并重叠于同一轴上的状态的多个基波激光进行波长变换，使通过波长变换而得到的多个激光(50)以重叠于同一轴上的状态出射。

Multi-wavelength laser equipment

同一軸上に重ね合わせられた複数の波長変換後の光が簡便な構成で得られ、且つ重ね合わせられる光に対する制限が緩和可能な、多波長レーザ装置を提供することを目的とする。基本波長が互いに異なる複数のレーザ光２０を出射するレーザ光源１０と、レーザ光源１０から出射されたレーザ光２０の進行方向を波長及び入射方向に応じて変更させ同一軸上に重なり合った状態で出射する分散素子３０と、周期的に形成された分極反転領域及び非分極反転領域を有し、分散素子３０から出射され同一軸上で重なり合った状態の複数の基本波レーザ光に対し波長変換をし、波長変換により得られた複数のレーザ光５０を同一軸上に重なり合った状態で出射する波長変換素子４０と、を備える。 An object of the present invention is to provide a multi-wavelength laser device in which a plurality of wavelength-converted lights superimposed on the same axis can be obtained with a simple configuration and the restriction on the superimposed light can be relaxed. The laser light source 10 that emits a plurality of laser beams 20 having different fundamental wavelengths and the traveling direction of the laser beam 20 emitted from the laser light source 10 are changed according to the wavelength and the incident direction, and are emitted in a state where they overlap on the same axis. The wavelength conversion is performed on a plurality of fundamental laser beams emitted from the dispersion element 30 and overlapped on the same axis. The dispersion element 30 has a polarization inversion region and a non-polarization inversion region formed periodically. And a wavelength conversion element 40 that emits a plurality of laser beams 50 obtained by wavelength conversion in a state of being overlapped on the same axis.

Resonator mirror for an optical resonator of a laser device and laser device

Die Erfindung betrifft einen Resonatorspiegel (4) für einen optischen Resonator (1) einer Laservorrichtung (2), insbesondere eines Gas- oder Bandleiterlasers, umfassend eine reflektierende Oberfläche (6) mit einem strukturierten Bereich (5), welcher sich über ein um die optische Achse (5) zentriertes Gebiet der reflektierenden Oberfläche (6) erstreckt. Der strukturierte Bereich (5) weist gemäß einer Variante des der Erfindung zu Grunde liegenden Gedankens zumindest einen reflektierenden Oberflächenabschnitt (8, 18, 28, 38, 48, 58, 68) auf, der gegenüber der außerhalb des strukturierten Bereichs (5) verlaufenden reflektierenden Oberfläche (6) parallel zur optischen Achse (A) um die Hälfte einer vorgegebenen Wellenlänge oder um ganzzahlige Vielfache der Hälfte der vorgegebenen Wellenlänge versetzt angeordnet ist. Gemäß einer anderen Variante weist der strukturierte Bereich (5) zumindest zwei Oberflächenabschnitte (8, 18, 28, 38, 48, 58, 68) auf, die zueinander parallel zur optischen Achse (A) um die Hälfte einer vorgegebenen Wellenlänge oder um ganzzahlige Vielfache der Hälfte der vorgegebenen Wellenlänge versetzt angeordnet sind. Die Erfindung betrifft ferner eine Laservorrichtung (2), deren optischer Resonator (1) einen derartig ausgebildeten Resonatorspiegel (4) umfasst. The invention relates to a resonator mirror (4) for an optical resonator (1) of a laser device (2), in particular a gas or stripline laser, comprising a reflective surface (6) with a structured region (5) which extends over the optical Axis (5) centered area of the reflective surface (6) extends. The structured region (5) has, according to a variant of the idea underlying the invention, at least one reflecting surface section (8, 18, 28, 38, 48, 58, 68) which is opposite to the reflective one outside the structured region (5) Surface (6) is arranged offset parallel to the optical axis (A) by half of a predetermined wavelength or by integral multiples of half of the predetermined wavelength. ...

Wavelength discriminating slab laser

Laser device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Powerful pulsed self-seeding co2 laser

FIELD: electricity. SUBSTANCE: invention relates to laser equipment. CO 2 laser comprises an unstable laser cavity in the form of a first optical resonator having a semi-transparent output coupler, a laser medium in the unstable laser cavity, and means for exciting the laser medium. Laser further comprises a second optical resonator optically coupled with the unstable laser cavity beyond the light aperture of the output coupler, wherein the second resonator comprises at least one focusing member, and wherein the optical length of the second optical resonator is equal to or is a multiple of the optical length of first optical resonator. Laser further comprises a Q-switching device arranged in the focal plane of said focusing member, and means for synchronising operation of the means for exciting the laser medium with operation of the Q-switching device. EFFECT: technical result is enabling increase in radiation power. 9 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 657 345 C2 (51) МПК H01S 3/223 (2006.01) H01S 3/082 (2006.01) H01S 3/11 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H01S 3/2232 (2018.02); H01S 3/082 (2018.02); H01S 3/11 (2018.02) (21)(22) Заявка: 2015132844, 16.01.2014 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ГИПЕРМЕМО ОЙ (FI) Дата регистрации: 13.06.2018 R U 16.01.2014 (72) Автор(ы): КИЙКО Вадим (FI) (56) Список документов, цитированных в отчете о поиске: US 5173916 A1, 22.12.1992. US 6292505 B1, 18.09.2001. US 5157684 A1, 20.10.1992. RU 2321118 C2, 27.03.2008. 16.01.2013 FI 20135052 (43) Дата публикации заявки: 22.02.2017 Бюл. № 6 (45) Опубликовано: 13.06.2018 Бюл. № 17 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 17.08.2015 2 6 5 7 3 4 5 Приоритет(ы): (30) Конвенционный приоритет: FI 2014/050035 (16.01.2014) C 2 C 2 (86) Заявка PCT: (87) Публикация заявки PCT: R U 2 6 5 7 3 4 5 WO 2014/111626 (24.07.2014) Адрес для переписки: ...

Intra-cavity second harmonic generation (SHG) laser device

Short pulse laser equipment

Frustrated total internal reflection laser q-switch

A demand synchronized laser Q-switch of high optical efficiency and fast operation includes two prisms of fused quartz separated by a fraction of a wavelength of the laser light to be Q-switched and piezoelectric transducers mounted on the back sides of each prism. With no electrical signal applied to the piezoelectric transducers the prism separation produces frustrated total internal reflection that prevents laser oscillations between the two end mirrors of a laser cavity. Application of a voltage pulse to the piezoelectric transducers produces a shock wave in each prism that drives them into physical contact. The prisms then separate rapidly in response to reflection of the shock wave. When the prisms are sufficiently separated, laser oscillation between the cavity end mirrors occurs, and a high power output pulse is produced. The output pulse is terminated upon relaxation of the prisms or upon depletion of the population inversion, whichever occurs first. Alternatively, the prisms are separated sufficiently to allow total internal reflection, and application of a voltage pulse to the piezoelectric transducers brings the opposing faces of the prisms sufficiently close to produce high transmission of laser light through the two opposing faces.

Laser oscillator

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Short pulse laser system

근회절 제한 빔특성을 가지는 펄스당 수 밀리-줄(mJ/p)까지의 에너지 레벨로 5 나노초 이하의 짧은 지속시간을 가지는 펄스를 생성하는 레이저 시스템. 레이저 크리스탈은 다이오드 레이저에 의해서 여기되며, 적어도 두 개의 거울면을 가지는 공진기가 레이저 크리스탈을 통과하는 빔경로를 형성한다. 공진기내의 빔경로는 각 여기 주기의 말기 부근의 짧은 주기 동안만을 제외하고, 레이저 크리스탈 내에여기 에너지가 발생하게 하는 제1 광학셔터에 의해서 주기적으로 차단된다. 제1 광학셔터가 개방되어 있는 동안에, 제2 광학셔터가 주기적인 짧은 간격 동안만을 제외하고 공진기내의 빛을 차단한다. 상기 간격은 상기 공진기 내에서 빛의 속도로 이동하는 적어도 하나의 광펄스가 상기 공진기를 통하여 여러번 통과함으로써 매회 통과시마다 여기된 레이저 크리스탈로부터 에너지를 추출함으로써 강도를 증가시키는 간격으로 이루어져 있다. 광펄스가 강하게 형성된후, 광학 릴리스 메커니즘은 공진기로부터 펄스를 릴리스한다. Laser system for generating pulses with short durations of less than 5 nanoseconds with energy levels up to milli-joules per pulse (mJ / p) with near-diffraction limited beam characteristics. The laser crystal is excited by a diode laser and a resonator having at least two mirror surfaces forms a beam path through the laser crystal. The beam path in the resonator is periodically interrupted by the first optical shutter which causes excitation energy to be generated in the laser crystal except for a short period near the end of each excitation period. While the first optical shutter is open, the second optical shutter blocks light in the resonator except for a periodic short interval. The interval consists of an interval of increasing intensity by extracting energy from the excited laser crystal at each pass by passing at least one light pulse traveling at the speed of light in the resonator multiple times through the resonator. After the light pulses are formed strongly, the optical release mechanism releases the pulses from the resonator.

Side-pumped lasers

Methods and apparatus for side pumping lasers are disclosed. By pre-collimating radiation emitted by laser diode arrays, the present invention provides transverse mode matching to achieve fundamental, or TEM 00 , mode operation in the corresponding (nominally vertical) axis. Optics associated with the resonant cavity additionally redirect energy longitudinally through the gain media, enhancing fundamental mode operation in the (nominally horizontal) other axis as well. With dual forty-watt linear arrays of laser diodes and four longitudinal passes, TEM 00 mode outputs exceeding fifteen watts have been achieved.

Double-mode pulse solid laser

本发明提供的一种双模式脉冲固体激光器，其包括高反镜A(10)、增益模块(11)、偏振分光棱镜A(12)、电光调制器(13)、四分之一波片(14)、输出镜A(15)、相位调制器(20)、输出镜B(21)、高反镜B(22)、高反镜C(23)和偏振分光棱镜B(24)；与现有技术相比，本发明的优点在于：在一个激光器中包含电光调Q谐振腔和自由运转谐振腔，实现自由运转与电光调Q两种不同的工作模式，达到微秒级脉冲与纳秒级脉冲同步输出或切换输出的效果。

Solid-state pulse laser system with low average power and high luminance

본 발명은 높은 평균 전력의 고휘도 고상 레이저 시스템을 제공한다. 본 발명은 짧은 펄스 지속 기간을 가지는 시드 레이저 비임을 먼저 발생시킨다. 레이저 증폭기(24)는 10 11 W/㎠를 초과하는 휘도 레벨을 가지는 펄스를 발생시키도록 정밀하게 집속되는 증폭된 펄스 레이저 비임을 발생시키기 위해 시드 비임을 증폭한다. 양호한 실시예는 평균 전력이 1 ㎾ 범위의 전력, 초당 12,000개 펄스의 평균 펄스 주파수를 가지는 증폭된 펄스 레이저 비임을 발생시키는데, 펄스는 크기가 최대로 큰 스폿을 모의 실험하기 위해 신속하게 스티어링될 수 있는 직경이 20 ㎛ 인 스폿에서 10 14 W/㎠를 초과하는 휘도 레벨을 가지고 있다. 선택적으로, 수(예를 들어, 7개)개의 비임(병렬로 배열된 증폭기로부터의 비임)을 가지는 ㎑ 시스템은 20 ㎛에서 각각 집속될 수 있고, 100 내지 200 ㎛의 유효 스폿 크기를 발생시키도록 클러스터된다. 이러한 비임은 리소그래피용 X선 소오스를 발생시에 유용하다. The present invention provides a high intensity solid state laser system with high average power. The present invention first generates a seed laser beam having a short pulse duration. The laser amplifier 24 amplifies the seed beam to generate an amplified pulsed laser beam that is precisely focused to produce a pulse having a luminance level in excess of 10 < 11 > W / cm < 2 >. The preferred embodiment produces an amplified pulsed laser beam having an average power in the range of 1 kW, an average pulse frequency of 12,000 pulses per second, which pulses can be quickly steered to simulate a spot having a maximum size in that the diameter of the spot 20 ㎛ has a brightness level in excess of 10 14 W / ㎠. Alternatively, a kHz system with a number (e.g., seven) beams (beams from amplifiers arranged in parallel) may be individually focused at 20 占 퐉, and an effective spot size of 100-200 占 퐉 may be generated Cluster. Such a beam is useful in generating an X-ray source for lithography.

Method of obtaining of optical discharge in gas and device for its implementation

FIELD: physics, optics. SUBSTANCE: invention relates to laser technologies. The method of obtaining of optical discharge in gas consists in optical breakdown of gas with formation of absorbing plasma domain and its maintaining in a laser beam during its action. Meanwhile gas breakdown with formation of plasma domain is performed by focusing of radiation of short-pulse laser, and the maintaining of plasma domain is performed in the resonator of continuous laser or laser with long duration of impulse due to multiple passing of radiation of continuous laser or laser with long duration of impulse through the optical discharge. EFFECT: enhanced efficiency of laser energy utilisation. 6 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 548 372 C2 (51) МПК H01S 3/097 (2006.01) H05H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2010130149/28, 19.07.2010 (24) Дата начала отсчета срока действия патента: 19.07.2010 (72) Автор(ы): Чивель Юрий Александрович (BY) (73) Патентообладатель(и): Чивель Юрий Александрович (BY) (43) Дата публикации заявки: 27.01.2012 Бюл. № 3 R U Приоритет(ы): (22) Дата подачи заявки: 19.07.2010 (45) Опубликовано: 20.04.2015 Бюл. № 11 2006215712 A1, 28.09.2006, . RU 2302064 C2, 27.06.2007, . US 20090267005 A1, 29.10.2009. US 20050163184 A1, 28.07.2005 2 5 4 8 3 7 2 R U (54) СПОСОБ ПОЛУЧЕНИЯ ОПТИЧЕСКОГО РАЗРЯДА В ГАЗЕ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Изобретение относится к области лазерных плазменной области осуществляют в резонаторе технологий. Способ получения оптического непрерывного лазера или лазера с большой разряда в газе состоит в оптическом пробое газа длительностью импульса за счет многократного с образованием поглощающей плазменной прохождения излучения непрерывного лазера или области и ее поддержании в луче лазера в течение лазера с большой длительностью импульса через длительности его воздействия. При этом пробой оптический разряд. Технический ...

Composite resonator of excimer laser

FIELD: physics. SUBSTANCE: composite resonator of excimer laser has discharge chamber, output module, spectral line radiation narrowing module and module for amplification of radiation. Laser discharge chamber consists of working gas for generating radiation under effect of excitation source. Laser discharge chamber, output module and spectral line radiation narrowing module make narrowing resonator of spectral line, configured to narrow spectral line of radiation generated by working gas. Discharge chamber, output module and radiation amplification module make amplifying resonator configured to amplify power of radiation with spectral line, necked with narrowing resonator of spectral line radiation. EFFECT: technical result is aimed at narrowing of spectral line with simultaneous increase of output power of radiator. 9 cl, 3 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 607 815 C1 (51) МПК H01S 3/082 (2006.01) H01S 3/225 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2015128764, 20.12.2012 (24) Дата начала отсчета срока действия патента: 20.12.2012 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 20.12.2012 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 15.07.2015 (56) Список документов, цитированных в отчете о поиске: US 6590921 B2, 08.07.2003. CN (86) Заявка PCT: 1158507 A, 03.09.1997. US 5150370 A1, 22.09.1992. JP H 06164029 A, 10.06.1994. CN 2012/086971 (20.12.2012) (87) Публикация заявки PCT: 2 6 0 7 8 1 5 R U Адрес для переписки: 119019, Москва, Гоголевский б-р, 11, этаж 3, Московское представительство фирмы "Гоулинг ВЛГ (Интернэшнл) Инк.", Клюкин Вячеслав Александрович (54) СОСТАВНОЙ РЕЗОНАТОР ЭКСИМЕРНОГО ЛАЗЕРА (57) Формула изобретения 1. Составной резонатор эксимерного лазера, содержащий разрядную камеру лазера, которая содержит рабочий газ для генерации лазерного луча под действием источника возбуждения, и выходной модуль, причем составной ...

Optical resonators with orthogonally polarized modes

An optical resonator supporting two sets of simultaneously co-existent oscillation modes ( 30 and 31 ), having polarizations orthogonal to each other. Mode control elements ( 28 and 29 ), such as apertures and phase elements, are introduced into the resonator to allow only preferred modes to exist. The placement and orientation of the sets are designed such that the high intensity zones of one set fall on the nodes or low intensity zones of the other set in an interlaced pattern. Thus, in a laser resonator, better utilization of the gain medium ( 24 ) is achieved and the beam quality and brightness over multimode lasing are improved. This configuration improves the performance of high Fresnel number resonators, in both pulsed and continuous lasers, for applications such as scribing, drilling, cutting, target designation and rangefinding. An application of the intra-cavity coherent summation of orthogonally polarized modes is described, whereby azimuthally or radially polarized beams may be obtained.

Non- steady imaging resonator

本发明涉及非稳成像谐振腔。在一个方面中，功率放大器包括设置在第一垂直平面中的多个第一激光盘以及设置在与第一垂直平面相对的第二垂直平面中的多个第二激光盘，其中，多个激光盘被设置在中央水平面中，并且多个第一反射镜被设置在第一垂直平面中的以及多个第二反射镜被设置在第二垂直平面中的，其中，第一组反射镜被设置在下水平面中并且第二组反射镜被设置在上水平面中，其中，沿着光轴相邻的相应激光盘和反射镜被定位以在其间设置1:1成像系统。可描述其它方面。

Solid state laser equipment

METHOD FOR PRODUCING OPTICAL DISCHARGE IN GAS AND DEVICE FOR ITS IMPLEMENTATION

1. Способ получения оптического разряда в газе, состоящий в оптическом пробое газа с образованием поглощающей плазменной области и ее поддержании в луче лазера в течение длительности его воздействия, отличающийся тем, что пробой газа с образованием плазменной области и ее поддержание осуществляют в резонаторе лазера. ! 2. Способ по п.1, отличающийся тем, что пробой газа с образованием плазменной области и ее поддержание осуществляют в дополнительном резонаторе трехзеркального лазерного резонатора. ! 3. Способ по п.1, отличающийся тем, что пробой газа с образованием плазменной области и ее поддержание осуществляют в фокальной области сфокусированного конического лазерного пучка. ! 4. Способ по п.1, отличающийся тем, что пробой газа с образованием плазменной области и ее поддержание осуществляют в фокальной области объемного лазерного пучка. ! 5. Устройство для получения оптического разряда в газе, содержащее лазер, оптически связанный с фокусирующим объективом, отличающееся тем, что дополнительно содержит лазер, оптически связанный с фокусирующим объективом, системой формирования кольцевого пучка в виде отражательного аксикона и конического зеркала, а также поворотное коническое зеркало, причем угол схождения конического пучка равен 180°. ! 6. Устройство для получения оптического разряда в газе, содержащее лазер, оптически связанный с фокусирующим объективом, отличающееся тем, что дополнительно содержит лазер, представляющий собой набор дисковых или диодных лазерных сегментов, располагающихся на поверхности сферы с центром в точке пересечения их оптических осей. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2010 130 149 (13) A (51) МПК H01S 3/097 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2010130149/28, 19.07.2010 (71) Заявитель(и): Чивель Юрий Александрович (BY) Приоритет(ы): (22) Дата подачи заявки: 19.07.2010 (43) Дата публикации заявки: 27.01.2012 Бюл. № 3 (72) Автор(ы): Чивель Юрий Александрович (BY) R U Адрес ...

Laser with longitudinal mode selection

A laser is fabricated from an optical transmission medium having a laser cavity with an rare earth (e.g. Erbium) doped portion. At least one longitudinal mode is suppressed using a plurality of series coupled Fabry-Perot cavities, an optical grating, or a combination thereof. Ring lasers, Sagnac cavity lasers, Fox-Smith cavity lasers, and linear structures are disclosed.

A hybrid-type passively and actively mode-locked laser scheme

본 발명은 종래의 수동형 모드로킹 광섬유 레이저 구도가 가지는 초단 광펄스 생성 구도의 장점과 일반적인 능동형 레이저가 가지는 반복을 변환 특성 및 광펄스의 동기화가 쉬운 점을 동시에 활용하여, 반복을 변환 특성과 용이한 펄스 동기 특성을 가지면서 초단 광펄스를 얻을 수 있는 구도에 관한 것으로, 두 개의 루우프가 광커플러로 연결된 레이저 구조를 하며 한쪽 루우프는 기존의 수동형 모드로킹에서의 비선형 증폭 루우프로 구성되고 다른 쪽 루우프에는 광변조기와 광이득을 포함하여 능동형 모드로킹을 유도하며 시간지연선로를 이용하여 레이저 발진 반복율을 조절할 수 있도록 구성되어, 앞으로 고속 시간분할다중 광통신과 광프로세서, 초고속 광현상 분석에 고속 초단 광펄스의 활용은 가능한 것이다. The present invention utilizes the advantages of the ultra-short optical pulse generation composition of the conventional passive mode-locking fiber laser composition and the repetition characteristic of the general active laser, and the conversion characteristics and the easy synchronization of the optical pulses, thereby allowing the repetition to be easily converted to the conversion characteristics. It is a composition that can obtain ultra-short optical pulses with pulse synchronization characteristics. Two loops have a laser structure connected by an optocoupler. One loop consists of a nonlinear amplification loop in the conventional passive mode locking and the other loop has It is designed to induce active mode locking, including optical modulator and optical gain, and to adjust the laser oscillation repetition rate using time delay line.In the future, high speed ultra short optical pulse is used for high speed time division multiple optical communication, optical processor, and high speed optical phenomenon analysis. Application is possible.

LASER DEVICE

Emission of coherent light of two wavelengths - from a resonant cavity laser

Successive emission from a laser of beams of coherent light of adjustable wavelength and duration comprises (a) interposing >=1 lamina in the path of the beam in the laser resonance cavity, designed to split the beam into at least two branches; (b) selecting by means of selector elements placed in >=1 branch of the beam, the resonating wave lengths of the laser cavity corresp. to the branches; (c) interrupting the path of light in a certain number of branches of the laser beam thus using the emission of successive pulses of coherent light, the wave lengths selected by the selector elements corresponding to the branches of the laser beam, the duration of each pulse being more or less equal to the time for which the path of the light in the two arms of the beam is not interrupted. Method permits a laser to emit successively beams of coherent light of different wave length at least for adjustable periods, the selection of wave lengths being made very simply without the need for optical systems which are difficult to regulate.

Pulse laser with two modes of action.

Improvements to hydrostatic transmissions

OPTICAL SELECTOR DEVICE USING A CORNER OF A FIZEAU IN REFLECTION

LORSQU'ON DONNE UNE REFLECTIVITE SUFFISANTE ET UN FAIBLE POUVOIR ABSORBANT A SON DIEDRE DE SURFACES REFLECHISSANTES, UN COIN DE FIZEAU PEUT SERVIR DE REFLECTEUR OPTIQUE DIRECTIONNEL, FOURNISSANT D'UNE PART, DANS UNE PREMIERE DIRECTION, UNE BANDE ETROITE DE LONGUEURS D'ONDE, ET D'AUTRE PART LE RESTE DES LONGUEURS D'ONDE INCIDENTES, DANS UNE AUTRE DIRECTION. UN LASER A COLORANT COL PEUT ALORS ETRE DEFINI PAR LE COIN DE FIZEAU CF ET UN MIROIR DE SORTIE M, AVEC INTERPOSITION DE DEUX DIAPHRAGMES D. L'ACCORD, VARIABLE PAR TRANSLATION DU COIN DE FIZEAU DANS SON PLAN, CONCERNE SOIT UNE RAIE ETROITE, SOIT UN TROU ETROIT DANS UNE LARGE BANDE. PLUSIEURS RAIES PEUVENT AUSSI ETRE ACCORDEES SEPAREMENT. WHEN SUFFICIENT REFLECTIVITY AND LOW ABSORBENT POWER ARE PROVIDED TO ITS DIHEDRAL OF REFLECTING SURFACES, A CORNER OF A FIZEAU CAN ACT AS A DIRECTIONAL OPTICAL REFLECTOR, PROVIDING ON THE ONE HAND, IN A FIRST DIRECTION, A NARROW BAND OF LONG, AND ON THE OTHER HAND THE REST OF THE INCIDENT WAVELENGTHS, IN ANOTHER DIRECTION. A LASER WITH COLORING COLOR CAN THEN BE DEFINED BY THE CORNER OF FIZEAU CF AND AN OUTPUT MIRROR M, WITH THE INTERPOSITION OF TWO DIAPHRAGMS D. THE AGREEMENT, VARIABLE BY TRANSLATION OF THE CORNER OF THE FIZEAU IN ITS PLANE, CONCERNS EITHER A NARROW SLOT, EITHER A NARROW HOLE IN A LARGE BAND. SEVERAL RAYS MAY ALSO BE GRANTED SEPARATELY.

GENERATOR AND LASER SYSTEM WITH COUPLED SUB-CAVITIES

LASER MODE SELECTOR

a. Elément sélectif pour sélecteur de mode pour laser. b. Dans un sélecteur de mode du type Michelson constitué d'une séparatrice S1 et de deux miroirs dont l'un est M 1 , on monte dans un de ses bras un élément sélectif, par exemple en remplaçant un des miroirs du premier Michelson (ou les deux) par un second Michelson constitué d'une séparatrice S2 et de deux miroirs M2 et M3, dont la différence de chemin optique est dans un rapport voisin de la dizaine avec la différence de chemin optique du premier Michelson. c. Lasers à bande large. at. Selective element for laser mode selector. b. In a Michelson-type mode selector consisting of a separator S1 and two mirrors, one of which is M 1, a selective element is mounted in one of its arms, for example by replacing one of the mirrors of the first Michelson (or the two) by a second Michelson consisting of a splitter S2 and two mirrors M2 and M3, the optical path difference of which is in a ratio close to ten with the optical path difference of the first Michelson. vs. Broadband lasers.

Solid state laser mode selection device

Improvements made to a laser device and glass composition

Patent FR2492176B1

METHOD AND APPARATUS FOR THE CONTINUOUS PRODUCTION OF CONSISTENT VIBRATIONAL ANTI-STOKES SPECTRAS

Solid state laser equipment

METHOD AND APPARATUS FOR SPECTROSCOPIC ANALYSIS OF A GAS

SOLID MICROLASER WITH ELECTROOPTIC TRIGGERING WITH INDEPENDENT ELECTRODES, AND METHOD FOR THE PRODUCTION THEREOF

LASER CAVITY WITH POLARIZED CENTRAL EXTRACTION FOR COHERENT COUPLING OF INTRACAVITY INTENSIVE BEAMS

- La cavité laser (1) comporte une unité d'extraction (7) à extraction centrale, qui divise longitudinalement la cavité laser (1) en deux parties fonctionnelles (P1, P2), à savoir une première partie (P1) comprenant les éléments actifs (3), qui réalise une amplification des faisceaux laser (4), et une seconde partie (P2) qui réalise un couplage cohérent des faisceaux laser (4). - The laser cavity (1) comprises a extraction unit (7) with central extraction, which longitudinally divides the laser cavity (1) into two functional parts (P1, P2), namely a first part (P1) comprising the elements active elements (3), which amplifies the laser beams (4), and a second part (P2) which performs a coherent coupling of the laser beams (4).

Patent FR2729796B1