78results about How to "Increase pump power" patented technology

A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.

A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.

A method to increase the output power of narrow-linewidth rare earth-doped fiber amplifiers by suppressing simulated Brillouin scattering. The fiber amplifier is seeded with two or more lasers having frequencies and input powers that are sufficiently different. The seed signal with the highest emission cross section (e.g., signal 2) initially experiences the greatest gain. If signal 2 is also given sufficiently greater input power than signal 1, it will be amplified to its maximum value before the seed signals have reached the midpoint of the gain fiber. Beyond that point, the signal having the lower emission and absorption cross sections (signal 1) and significantly lower input power will continue to experience gain by power transfer from both signal 2 and the pump light, attaining a power output well beyond what the maximum output would have been had the amplifier been illuminated with a single frequency beam. This technique effectively reduces the Stokes light of signal 1, whereby higher power narrow-linewidth optical fiber amplifiers may be realized.

The invention relates to the technical field of novel lasers and discloses an alkali metal steam laser of polarized optical pumping. The alkali metal steam laser solves problems of high cost, low efficiency and low laser output power of existing semiconductor lasers and comprises an LD (laser diode) pumping unit, a gain unit and a resonance cavity, the LD pumping unit is placed outside the resonance cavity, the gain unit is placed in the resonance cavity, the LD pumping unit comprises an LD pumping source, a transmission optical fiber and a coupling lens group, a first magnetic pole and a second magnetic pole in the gain unit are arranged outside a constant-temperature furnace, an alkali metal steam pool is arranged inside the constant-temperature furnace, pumping light emitted by the LD pumping source is output to the coupling lens group by the transmission optical fiber, a coupling focusing piece enters the alkali metal steam pool through a polarized piece, effective particle number inversion of alkali metal atoms is realized under the action of pumping excitation, and alkali metal laser is formed under the feedback action of the resonance cavity and output by an output mirror. The alkali metal steam laser is low in cost, high in efficiency and high in laser output power.

The present invention discloses an end pumped order variable gradient adulterate composite lath laser amplifier, which comprises a laser gain medium, seed source, pumping source, coupling lens duct, lath cooling heat sink and indium transition layer, characterized in that the laser gain medium is N-order order variable gradient adulterate composite ceramic lath and is composed by 2N+3 segments that is sub-lath in middle section that has highest luminous ion concentration decreases, each N segment sub-lath with luminous ion concentration decreases gradually towards two ends, and sub-lath with zero adulterate on two ends, wherein N is positive integer. The present invention can improve temperature distribution homogeneity and decrease biggest thermal stress, and further realize laser output of high average power and high beam quality.

The invention relates to a laser and provides a dual-wavelength tunable inner cavity tera-hertz parametric oscillator and a using method thereof to realize the output of continuous tunable dual-wavelength high-power THz wave and the stable operation at room temperature. The invention adopts a technical proposal that: a pumplight resonant cavity consists of a planar holophote, a laser and an output mirror; the laser is a quasi-continuous semiconductor laser array side-pumped neodymium yttrium aluminum garnet Nd:YAG5 laser; a back pressure type electro-optical switch Q consisting of monopotassium phosphate KD P crystal and a polaroid is arranged between the planar holophote,and the laser; a TPO resonant cavity consisting of a magnesium-doped lithium niobate MgO:LiNbO3 crystal and two cavascopes is arranged between the laser and the output mirror; and the optical axis of the TPO resonant cavity and the optical axis of the pumplight resonant cavity are non-colinear; and the side of the magnesium-doped lithium niobate MgO:LiNbO3 crystal and an array silicon prism are coupled to output the tera-hertz wave. The dual-wavelength tunable inner cavity tera-hertz parametric oscillator and the using method are mainly used for manufacturing the laser.

A plant is adapted to feed paint to robots for automatic spray application of paint on objects provided with a container (5) made loosenable and removable from the robot for exchange for another such container when there is a desire to have more paint in the container and / or change paint. The plant has a station (8) with containers filled with paint, a transport device (15-18) with means (16) for transporting a container containing paint from said station when said desire arises to the robot and deliver this thereto as well as means adapted to receive a container to be exchanged from the robot and transport it away for taking care thereof.

An improved fiber array arrangement is provided that incorporates spacing and / or spacers between active fibers in a winding to reduce maximum active fiber temperature, with the spacing / spacer material distributed to minimize heating at locations of high pump power. Spacer material such as “dark” fibers and / or metal wires of similar diameter as the active fiber may be employed to aid winding / bundling of active fibers. Further, the use of channels, grooves, wall material and combinations thereof aid structural support / guidance for the winding / bundling of active fibers while providing predefined spacing and heat conductivity that reduces the maximum thermal temperature of the active fiber below design thresholds.

The invention disclose a two-crystal compound gain inner cavity Raman yellow light laser which comprises: the gain laser diode pumping source emits 808nm pumping light which is partly absorbed by the Nd: YAG crystal and Nd: YVO4 crystal coaxial placed, the two crystals provide the laser gain at the same time, The 1.06 mum laser polarization of the base frequency is Pi polarization which generates in the resonant cavity which is composed of the whole mirror and the yellow light output mirror; the base frequency laser passes Nd: YVO4 crystal obtains the Raman gain, 1.18 mu m stokes light generates outreaching by the oscillation after outreaching the Raman scattering threshold value; 1.18mum anti-Stokes light is multiplied through the crystal multiplier, the 588nm yellow light is generated and output through the output mirror. The technical scheme depends on double crystal compound gain to guarantee laser polarization so as to increase the multiplier efficiency; higher pump power is exerted depending on high Nd: YAG crystal heat rupture threshold value, therefore the yellow output power is increased.

An optical system adapted to amplify an input signal includes an optical pump supporting the input signal and an optical pump beam. The optical pump includes an input port, a first active medium coupled to the input port, and a pump output coupled to the first active medium. The optical amplifier includes an amplifier input optically coupled to the pump output and adapted to receive the input signal after passing through the optical pump, a second active medium coupled to the amplifier input, and an amplifier output adapted to output the amplified input signal.

The invention is a strip laser of implementing Z-shaped light path by reflecting glass, characterized in that: laser medium is cuboid. Two end surfaces of the laser medium are bonded with undoped crystals, and pumped light enters through the reflecting glass and cooling water layer into the laser crystal and is absorbed by the laser medium. The top and bottom large surfaces of the laser medium are cooled with water. The laser resonance cavity is a flat cavity. And it reduces the effect of traditional Z-shaped strip on laser total reflection caused by thermal deformation of crystals and reduces the requirements for surface smoothness of crystals, and it eliminates stress induced laser birefraction and reduces end surface effect by the undoped crystals easy to radiate heat. Further, it reduces waste heat deposition in crystals by laser diode array side pumping, able to implement high power and high beam quality laser output.

The invention discloses a laser, relating to a diode solid state laser, in particular to a method for combining multiple Q-switching pulse lasers. Multiple groups of diode solid state lasers are distributed around a center axis on a shell bracket with the same radius; laser media are distributed around the center axis of a medium disk with the same radius; a medium disk driving device drives the medium disk to rotate, so that laser media in the medium disk fall into all optical axes of the laser resonant cavity on the shell bracket; laser medium pumping light in each resonant cavity is injected in by a pump laser diode; the laser medium is activated because of realizing population inversion; a Q-switching element is opened, laser is output out of the resonant cavity; and when heat effect generated when the laser medium is irradiated by the pumping light affects laser output quality, the Q-switching element is closed, the medium disk driving device drives the medium disk to rotate, and the next laser medium in the medium disk is on each optical axis of the laser resonant cavity to restart the next operation.

The invention relates to a side pump all fiber and a laser and an amplifier based on the all fiber. The side pump all fiber comprises a gain fiber and a transmission fiber which are welded without a melting point. The invention provides the side pump all fiber without the fiber melting point at a pump section and with high pump coupling efficiency and a good heat radiation effect, and provides the laser and the amplifier based on the all fiber.

High-power, diode-pumped solid state (DPSS) pulsed lasers are preferred for applications such as micromachining, via drilling of integrated circuits, and ultraviolet (UV) conversion. Nd:YVO4 (vanadate) lasers are good candidates for high power applications because they feature a high energy absorption coefficient over a wide bandwidth of pumping wavelengths. However, vanadate has poor thermo-mechanical properties, in that the material is stiff and fractures easily when thermally stressed. By optimizing laser parameters and selecting pumping wavelengths and doping a concentration of the gain medium to control the absorption coefficient less than 2 cm−1 such as the pumping wavelength between about 910 nm and about 920 nm, a doped vanadate laser may be enhanced to produce as much as 100 W of output power without fracturing the crystal material, while delivering a 40% reduction in thermal lensing.

There is provided a two-stage brightness converter. A first brightness conversion stage has a laser cavity having a first optical waveguide doped with an active ion defining a first optical band with optical absorption, a second optical band with optical absorption and optical gain, and a third optical band with optical gain. The first laser cavity is pumped with a pump power having a wavelength in the first optical band to generate an intermediate optical signal in the second optical band. A second brightness conversion stage which is in cascade with the first brightness conversion stage comprises a second optical waveguide doped with the same active ion. The second brightness conversion stage is pumped with the intermediate optical signal to obtain a high brightness optical signal in the third optical band.

A chip-shaped laser medium (12) is side pumped to improve mode matching between the pumping energy (50) and lasing mode volume (36). The chip thickness (44) and laser medium doping level can be designed and controlled to ensure adequate pumping coupling efficiency. The chip shape can also be employed to provide greater chip surface areas (22) for cooling the laser medium (12). The laser pumping package (70), gain module (101), and chip-shaped design can be scalable to offer higher pumping power and high output power. Different orientations of the gain modules (101) with respect to each other can be used to provide better lasing mode quality.

The invention provides a high-power inner cavity frequency doubling single-frequency laser device. The high-power inner cavity frequency doubling single-frequency laser device comprises a pumping source (1), a gain crystal (2), a ring-shaped resonant cavity, an isolator, a frequency doubling crystal (6) and a thermal lens effect compensating plate (5), wherein the isolator is composed of a magneto-optical medium (3) and a half wave plate (4) which are placed in a permanent magnet. The thermal lens effect compensating plate (5) is placed close to the magneto-optical medium (3). The thermal lens effect compensating plate (5) is an optical crystal thin plate with a certain thickness, has a negative thermo-optical coefficient and is provided with two parallel light-transmitting faces. The thermal lens effect of the magneto-optical medium (3) can be dynamically compensated for. The thermal lens effect of the magneto-optical medium is dynamically compensated for through the crystal thin plate with a certain thickness and a negative thermo-optical coefficient, the inside-cavity light beam quality degradation caused by the thermal lens effect of the magneto-optical medium can be relieved or eliminated, the stable area of the laser device is expanded, and therefore the high-power inner cavity frequency doubling single frequency laser device stably running is obtained.

The invention relates to a laser, in particular to a full solid-state laser with an optical fiber coupling double-end pump, comprising a first pump source, a second pump source, a U-shaped type resonant cavity, a first gain medium and a second medium, wherein the U-shaped resonant cavity mainly consists of a plane total reflecting mirror, an output coupling mirror and two diphase color mirrors. The output coupling mirror and the plane total reflecting mirror are respectively arranged at the back of the first gain medium and the second medium, the first diphase color mirror and the second diphase color mirror are respectively arranged on a pump optical path of the first pump source and a pump optical path of the second pump source, and form a certain included angle of 90 degrees with the pump optical paths. The invention aims to design the full solid-state laser with the optical fiber coupling double-end pump which has large output power. Compared with the prior art, the invention has the advantages of better quality of light beams, favorable dynamic output stability of laser basic mode, better long-term work stability and the like.

A kind of noise pulse generator, the optical fiber ring cavity includes a wavelength division multiplexer, a doped optical fiber, an optical isolator, a polarizer, a polarization controller and a fiber coupler connected in sequence with optical fibers to form a closed-loop structure, and a pump source Connected with the pump port of the wavelength division multiplexer, the fiber coupler includes a loop output port, a target output port and an input port, and the input port and the common port of the wavelength division multiplexer pass through a doped optical fiber, an optical isolator, The polarizer and the polarization controller are sequentially connected to form a connection loop section, the loop output port is connected to the signal port of the wavelength division multiplexer, and the target output port is used to output "noise-like" pulses. The invention adopts fiber-optic devices to build a total positive dispersion all-fiber laser, and utilizes the Raman effect of the optical fiber to generate broadband "noise-like" pulses in the total positive dispersion region.

A lens conduit coupled solid slab laser adopts cuboid flake laser solid slab as laser medium. Said invention adopts solid core lens conduit coupling laser diode array outputted pump light to laser medium, said pump light lens conduit from laser solid slab side entering solid slab, total reflecting through slab two large face and absorbing by slab, laser solid slab having upper and lower large face and using water flowing heat sink to radiate heat, laser resonator adopting flat cavity. Said invented laser has compact structure, high coupling efficiency, good heat radiation effect, large laser output power and high light beam quality properties.

A random distributed Rayleigh feedback fiber laser based on a double-cladding weakly ytterbium-doped fiber includes: a pump laser source, a pump combiner, a cladding power stripper, and a double-cladding weakly ytterbium-doped fiber for simultaneously achieving distributed active gain and random distributed Rayleigh feedback. An output end of the pump combiner is connected with one end of the double-cladding weakly ytterbium-doped fiber, the other end of the double-cladding weakly ytterbium-doped fiber is connected with an input end of the cladding power stripper, and a concentration of ytterbium ions in the double-cladding weakly ytterbium-doped fiber is in a range of 0.5×1023 to 1×1027 / m3. The laser provided by the present invention solves the problem that the existing random fiber lasers cannot simultaneously utilize distributed active gain and random distributed Rayleigh feedback with a single type of fiber.

A method for producing non-equidistant pump waves for Raman amplification of a signal which is passed via an optical waveguide, as well as a pump wave producing apparatus for producing pump waves for Raman amplification of a signal which is passed via an optical waveguide, which apparatus has at least one pump source and is set up such that it can produce pump waves at a first, a second, a third and a fourth mutually equidistant pump wavelength, having a control device which is set up such that it causes, in each case, the production of a pump wave u, v, w at the first, second and fourth pump wavelengths, with the control device being set up such that no pump wave is produced at the third pump wavelength, so that a non-equidistant pump channel pattern is achieved overall.

In the English translation document, please add the paragraph at page 8 line 1, after the newly added ABSTRACT section heading, as follows: The aim of the invention is to optimize the analysis of substances separated by gas chromatography with a gas chromatograph, comprising a separating device and a mass spectrometer situated down there from. To this end, a detector that detects the separated substances in a nondestructive manner is placed in-line between the output of the separating device and a controllable inlet valve of the mass spectrometer. An evaluating device situated down from the detector evaluates the detector signals and, based on the evaluation, controls the inlet valve for introducing predeterminable substances into the mass spectrometer.

The invention provides a high-power slab green laser. The high-power slab green laser includes a pump source, a focusing system, a laser resonator and a self-frequency doubling crystal. The self-frequency doubling crystal is a neodymium ion doped calcium borate rare earth salt crystal cut into a slab shape along a direction of a maximum non-principal effective nonlinear coefficient of the crystal.Phase matching of different wavelengths is realized by changing a tangential direction of the crystal so as to realize laser output in 545 nm or 550 nm band. The pump source is a laser diode array having an emission center wavelength of 808 nm or 880 nm. An input cavity mirror and an output cavity mirror are coated with suitable film systems so as to obtain high-power laser output in the 545 nm or 550 nm band. The laser of the invention has the advantages of low laser threshold, high conversion efficiency and output power, and simple laser structure.

Concepts of the present disclosure may be employed to optimize optical pumping and ensure high modal gain in the active region of an optically pumped laser source by establishing an optical coupling gap such that the pump waveguide mode field overlaps the active gain region associated with the signal waveguide. The optical coupling gap is tailored to be sufficiently large to ensure that a significant active gain region length is required for absorption and sufficiently small to ensure that the pump waveguide mode field P overlaps the active gain region. In accordance with one embodiment of the present disclosure, the pump waveguide core is displaced from the signal waveguide core by an optical coupling gap g in a lateral direction that is approximately perpendicular to the optical pumping axis. A decayed intensity portion of the pump waveguide mode field extends into the active gain region to optically pump the active gain region and form an optical signal propagating along the longitudinal optical signal axis of the signal waveguide core.

The invention discloses a random distributed Rayleigh feedback fiber laser based on double-cladding weak ytterbium-doped fiber, and relates to the field of fiber and fiber lasers. The random distributed Rayleigh feedback fiber laser comprises a pump laser source, a pump beam combiner and a cladding power stripper, and further comprises the double-cladding weak ytterbium-doped fiber used for simultaneously realizing distributed active gain and random distributed Rayleigh feedback; the output end of the pump beam combiner is connected with one end of the double-cladding weak ytterbium-doped fiber, and the other end of the double-cladding weak ytterbium-doped fiber is connected with the input end of the cladding power stripper; and the concentration value range of ytterbium ions in the double-cladding weak ytterbium-doped fiber is 0.5*10<23>-1*10<27> / m<3>. According to the random distributed Rayleigh feedback fiber laser, the problem that an existing random fiber laser cannot simultaneously provide distributed active gain and random distributed Rayleigh feedback is solved, and the effect of simultaneously providing distributed active gain and random distributed Rayleigh feedback through the single fiber is achieved.

The invention, which belongs to the technical field of optical parametric oscillator, provides a double-end-surface pumping optical parametric oscillator comprising a laser pumping source and the like. The optical parametric oscillator is characterized in that a beam splitter is arranged in rear of the laser pumping source and splits pump light into two light paths; the two paths of light beams are transmitted into a resonant cavity through respective light paths front the front side and the rear side of the resonant cavity, thereby forming a double-end-surface pumping optical parametric oscillator. Generated parametric light is outputted from a light resonant cavity of an output terminal. According to the invention, with the dual-end pumping way, a problem that the laser pump power is limited due to a low crystal destruction threshold during the single-end pump process can be solved; and the heat effect of the optical parametric oscillator can be reduced. Moreover, on the basis of the reasonable design of the resonant cavity, the good cavity model matching is realized, thereby obtaining the high-power high-light-beam-quality optical parametric laser output.

The present invention relates to the field of fiber lasers, in particular to a polarization-maintaining fiber pumping combiner and a manufacturing device and method thereof. The polarization-maintaining fiber pumping combiner comprises a polarization-maintaining fiber 1 as a signal input channel, pumping fibers 2 and an output fiber. The polarization-maintaining fiber pumping combiner is characterized in that: the polarization-maintaining fiber pumping combiner further comprises a polarization-maintaining fiber-switching fiber 4; the polarization-maintaining fiber-switching fiber 4 is mode-matched through a mode matching section 3 of the polarization-maintaining fiber-switching fiber 4 with the polarization-maintaining fiber 1 as the signal input channel; the core diameter of one end of the mode matching section 3 is the same as the core diameter of the polarization-maintaining fiber 1; and a plurality of pump fibers 2 are evenly arranged outside the welded polarization-maintaining fiber 1. According to the technical scheme of the present invention, the problems that the existing pump combiner has a low power, the stress hole is easy to be damaged, and the environment is polluted during processing can be solved.

The invention discloses all-solid-state folding intra-cavity sum frequency yellow orange laser vascular disease therapeutic apparatus. The therapeutic apparatus comprises a first pump light source and a second pump light source, wherein the first pump light source is connected with a first transmission optical fiber, the first transmission optical fiber is connected with a first optical coupling unit, a first input endoscope, a first laser gain medium and a first bi-color mirror lens are arranged beside the first optical coupling unit in sequence, one end of the first bi-color mirror lens is a sum frequency crystal, the other end of the first bi-color mirror lens is a second bi-color mirror lens, and a total-reflection endoscope is arranged beside the sum frequency crystal; the second pump light source is connected with a second transmission optical fiber, and a second optical coupling unit, a second input endoscope and a second laser gain medium are arranged between the second transmission optical fiber and the second bi-color mirror lens in sequence. The all-solid-state folding intra-cavity sum frequency yellow orange laser vascular disease therapeutic apparatus has the advantages of being small in size, low in weight, compact in structure, available in all-solid-state air cooling, low in electricity consumption, convenient to carry, and capable of improving pumping power and reducing side effects.

The invention discloses a large-power 1064 nm near-infrared laser based on a wattle structure. The large-power 1064 nm near-infrared laser based on the wattle structure is characterized in that the large-power 1064 nm near-infrared laser based on the wattle structure comprises a laser crystal, optical lenses placed on both sides of the laser crystal and a semiconductor laser pumping module, a laser resonant cavity forming pump lights into 1064 nm lasers with high beam quality and a modulating component modulating the lasers, wherein the laser crystal is a wafer with the wattle structure, an optical direction of the pump lights is in the wafer, a M-shaped light path is formed by the lasers in the laser. The large-power 1064 nm near-infrared laser based on the wattle structure has the advantages that the first-order hot focus, the stress birefringence and the depolarization effect can be lightened even eliminated through the reasonable M-shaped light path designed and the curvature radius of the cylindrical mirror chosen appropriately, thus the simple wattle laser structure is used so as to obtain better light bean quality and higher output power. A diaphragm is arranged inside the laser resonant cavity and can further improve the light beam quality.