240 results about "Solid-state laser" patented technology

The invention discloses a wavelength-adjustable high-power picosecond all-solid-state laser. The microchip seed source adopts a passive Q-switching principle, can directly generate laser with the pulse width as narrow as 300ps, is high in seed laser efficiency, good in beam quality and large in energy, can synchronously output TTL (transistor-transistor logic) level, and is used for controlling the pulse duration and delay of a 808nm QCW pumping source; the optical isolator protects the front-stage microchip solid laser from being damaged by returned light of the rear-stage amplifier; the single-rod two-way end pump amplifier amplifies laser pulse energy output by the microchip solid laser; the light beam shaper comprises a Galileo laser beam shrinking system and a soft edge diaphragm and is used for shaping light beams; the single-rod one-way end pump amplifier amplifies the pulse energy of the preceding-stage laser; and the frequency multiplier performs frequency conversion on the output laser, and outputs wavelength-adjustable picosecond laser with millifocus magnitude, high power and high beam quality.

The invention provides an all-solid-state high-power single-frequency laser based on an optical fiber-slab mixed structure, and relates to the technical field of solid lasers, and the all-solid-state high-power single-frequency laser comprises an all-solid-state continuous single-frequency seed module, an optical fiber pulse modulation module, an optical fiber pre-amplification module, a slab laser pre-amplification module, a slab laser main amplification module and a frequency multiplication module which are sequentially arranged; the lath laser pre-amplifier and the lath laser main amplifier are used for compensating thermally induced aberration generated by lath laser through multi-pass amplification designed according to the spherical aberration self-compensation principle, and then the quality of light beams is improved. In addition, a discrete mirror group is adopted to replace a complete amplifier cavity mirror, spontaneous radiation and parasitic oscillation in the working process of the amplifier are effectively restrained, nearly hundred mJ-magnitude single-frequency pulse laser with excellent light beam quality can be obtained, and application to laser radar detection or industry can be met.

The utility model relates to the technical field of laser crystal cooling, in particular to a heat sink device applied to a crystal in a solid laser, which comprises a heat sink base and a heat sink upper cover which jointly form a transverse through groove, the crystal is inserted in the through groove, and an indium foil layer is covered and adhered on the inner wall of the through groove. The indium foil layer can also be attached to the side wall of the crystal in a surrounding mode, a compression piece is arranged on the heat sink upper cover and compresses the heat sink upper cover downwards, and the compression amount of the compression piece is smaller than the thickness of the indium foil layer. According to the heat sink device applied to the crystal in the solid laser, the contact surface of the crystal and the heat sink is filled with indium without gaps, the side surface of the crystal is uniform in heat conduction, and the crystal is not stressed and does not deform, so that the crystal can bear higher injection power without being damaged; light spot distortion caused by non-uniform temperature distribution and deformation of the clamped crystal in the output laser is avoided, the requirement of the installation process on personnel is not high, and the problem that the crystal is prone to damage in the installation process in the traditional technology is solved.

The invention relates to a self-optimization control method and system for a mode-locked state of a solid laser. Firstly, an initial data set containing at least one of pulse width, frequency, temperature and vibration data is obtained, then the initial data set is preprocessed, and a mode locking stability feature set is extracted from the initial data set. And then, inputting data in the mode locking stability feature set into a support vector machine model so as to obtain a mode locking strength predicted value. And then, calculating a deviation value between the mode locking strength predicted value and the real-time data, generating an optimization decision value by using Kalman filtering, and if the deviation between the optimization decision value and the real-time data exceeds a preset threshold value, adjusting operation parameters. And finally, inputting the adjusted operation parameters into a mapping relation model optimized by using a gradient descent algorithm, and further generating a dynamic power configuration scheme. According to the method, the stability and automatic regulation and control of the mode locking state are realized, the efficient utilization of resources is realized, and the performance and adaptability of the solid laser are greatly improved.

The invention belongs to the technical field of solid-state lasers, and discloses a solid-state laser circulating cooling heat dissipation system which comprises a shell, a heat conduction plate and a top plate, the heat conduction plate and the top plate are fixed in the shell, and a heat dissipation inner cavity is formed between the heat conduction plate and the top plate; a backflow cavity is formed in the heat conduction plate, a refrigeration plate and an internal circulation fan are fixed to the top of the heat conduction plate, and the refrigeration plate is used for installing a heating element of the solid laser. A water cooling groove and a plurality of air cooling holes are formed in the refrigeration plate; a water cooling groove is formed in the shell, the water cooling groove is in a snakelike extending shape, the side walls of the two ends of the water cooling groove in the length direction are open, a water cooling pipeline is embedded in the water cooling groove, and a water cooling module connected with the water cooling pipeline is fixed to the outer side of the shell; the multiple air cooling holes comprise air inlet holes and air outlet holes, the heat dissipation inner cavity, the air inlet holes, the air outlet holes and the backflow cavity are sequentially communicated, the air inlet holes are the air cooling holes which are not completely covered by the heating element, and the air outlet holes are the air cooling holes which are completely covered by the heating element.

The invention discloses a solid laser light-gathering cavity and a solid laser, and relates to the technical field of laser, the solid laser light-gathering cavity and the solid laser are provided with a light-gathering cavity main body, a heat conduction sleeve and a water cooling sleeve, and light source heat in the light-gathering cavity main body is transmitted to the water cooling sleeve through the heat conduction sleeve; water in the water-cooled jacket can cool heat and radiate and refract the light source at the same time, when the light source irradiates the condensation reflection coating and the metal reflection film in the water-cooled jacket, the light source is transmitted to the crystal rod again through the water and the heat conduction jacket, and when the light source reaches the heat conduction graphite film in the water-cooled jacket through the condensation reflection coating and the metal reflection film, the heat conduction graphite film is cooled. The heat-conducting graphite film can transmit heat to the water-cooled jacket, and meanwhile, the heat can be transmitted out through the radiating fins, so that the heat can be quickly and effectively dissipated, and the surface of the solid laser is prevented from being hot.

The invention belongs to the field of solid lasers, and particularly relates to a laser for realizing high-power pump beam quality enhancement based on multi-stack heat transfer, which comprises a pump module, a pump shaping coupling module, a multi-stack crystal, a cube-corner prism, an output mirror and a cooling device. And the multi-laminated crystal adopts a high-thermal-conductivity diamond film, so that transverse rapid diffusion of heat is realized, local heat accumulation and temperature rise are relieved, wavefront distortion and a thermal lens effect caused by thermally induced refractive index change are reduced, and the stability of a laser mode is improved. The cube-corner prism is used as a resonant cavity mirror surface, can automatically compensate angle deviation, optimizes mode matching in the cavity, has a synergistic effect with a zigzag total internal reflection path in the crystal, further balances a heat affected zone, improves light field distribution, and remarkably improves light beam uniformity, stability and TEM00 mode quality. The structure is high in adaptability, is suitable for various wavelengths, pumping modes and thermal loads, and assists the laser to realize miniaturized, high-integration and high-performance output.

The utility model provides a GHz femtosecond pulse laser generating device which comprises a low-frequency femtosecond pulse laser generating assembly and at least two repetition frequency multiplication units. Each repetition frequency multiplication unit comprises a polarization beam splitter, an optical fiber delay line and a polarization beam combiner, input light of the repetition frequency multiplication units is divided into two paths of linearly polarized light through the polarization beam splitters, one path of linearly polarized light directly enters the polarization beam combiners, and the other path of linearly polarized light enters the polarization beam combiners through the optical fiber delay lines; and the two paths of linearly polarized light are output after being subjected to polarization beam combination in the polarization beam splitter. According to the utility model, by adopting an extra-cavity repetition frequency multiplication mode of polarization beam splitting and beam combination, the problems that the femtosecond GHz pulse directly output by the laser is difficult to weld due to too short optical fiber length and the stability of the solid laser is poor are solved, and the problems that the pulse is uneven due to cascade frequency multiplication through a coupler and the power is reduced due to the addition of an attenuator are solved; and low noise, high stability, long service life and all-fiber output of the GHz femtosecond laser are realized.

The embodiment of the invention discloses a solid laser with adjustable pulse width. According to one specific implementation mode, the solid laser comprises a shell, a pumping source, a gain medium, a controller, a pulse width regulation and control assembly, a first cavity mirror, a second cavity mirror, a Q-switching unit and a monitoring feedback device are arranged in the shell, and the pumping source is installed in front of the first cavity mirror; the gain medium is mounted behind the first cavity mirror, and the pumping source is configured to emit pumping light to the gain medium; the gain medium, the Q-switching unit and the second cavity mirror are sequentially arranged from front to back; the pulse width regulation and control assembly is installed in a resonant cavity of the laser. The monitoring feedback device is installed at the output end of the solid laser and used for detecting the actual pulse width and feeding back the actual pulse width to the controller. The controller is in communication connection with the monitoring feedback device and the pulse width regulation and control assembly. According to the embodiment, the actual pulse width of the output laser can be detected in real time, and the pulse width of the output laser can be adjusted. Therefore, the working accuracy of the laser can be improved.

The utility model relates to the technical field of laser devices, and discloses a laser assembly and a solid laser thereof, and the laser assembly comprises a liquid cooling heat dissipation block which is provided with an installation cavity arranged along the axial direction in a through manner, and is used for introducing a cooling medium; the number of the laser array modules is at least two, each laser array module comprises a strip-shaped heat conduction block and a plurality of bar units arranged in an arrayed mode, the bar units on each heat conduction block are connected in series, the heat conduction blocks are all arranged on the inner wall of the installation cavity and arranged in the circumferential direction, and the heat conduction blocks are used for conducting heat of the bar units to the liquid cooling heat dissipation block; and the heat is taken away by a cooling medium introduced into the liquid cooling heat dissipation block. By means of the mode, on the premise that it is guaranteed that the laser has high power and heat dissipation efficiency, it is guaranteed that no liquid leakage problem occurs after long-term use, the strip-shaped heat conduction blocks and the multiple strip units arranged in the extending direction of the heat conduction blocks can be replaced, and the maintenance cost of the laser is reduced.

The invention discloses an underground fluid detection device integrating acoustic signals and a laser-induced breakdown spectroscopy technology. The underground fluid detection device further comprises a laser spectrum acquisition device, an acoustic signal acquisition device and a fusion signal analysis and correction module, the laser spectrum acquisition device is arranged above the conveying pipeline and comprises a solid laser, a beam expander, a reflector, a focusing lens and an optical fiber probe; the acoustic signal acquisition device is arranged close to one end of a water inlet of the drainage pipeline, and the fusion signal analysis and correction module is connected with the laser spectrum acquisition device and the acoustic signal acquisition device; the fusion signal analysis and correction module comprises a processor, the processor is connected with the oscilloscope, compared with the prior art, the LIBS technology and the acoustic detection technology are fused, the characteristics of the underground fluid can be known more comprehensively, and the efficiency and accuracy of underground fluid detection are greatly improved.

A pumping module of a VCSEL side-pumped solid-state laser and a corresponding solid-state laser. The pumping module uses a design of pumping in an even number of directions, achieves a symmetrical pumping cavity and a mutual reflection chamber, and improves pumping light distribution uniformity. By means of the high reflectivity characteristic of surfaces of VCSEL chips (2) and a packaging substrate and a heat sink (1) therefor, a design in which no independent reflection chamber is provided and the heat sink (1) is integrated is realized, the structure is simplified, and the symmetry of light spots is improved. In addition, a cooling pipe (4) having a frosted outer surface is introduced, so that the uniformity of light beams is further improved by means of a diffusion mechanism, and reflection on the surfaces of the VCSEL chips (2) is used to compensate for possible loss, thereby ensuring that optical-to-optical efficiency is almost unchanged. By using an eccentric pumping structure and an optimized wavelength distribution of the VCSEL chips (2), the absorption uniformity of a crystal rod (200) is further improved; and the uniformity of light beams can be effectively improved, especially when the diameter of the crystal rod (200) is large. The present invention has the advantages of a simple structure, stable performance and good light spot symmetry.

The invention relates to a high-power dual-wavelength erbium-doped solid laser, and belongs to the technical field of laser. The high-power dual-wavelength erbium-doped solid laser comprises a pumping source, a pumping cavity, a diamond, a heat sink, a first resonant cavity and a second resonant cavity, the first resonant cavity comprises a first erbium-doped YAG slice crystal, and the second resonant cavity comprises a second erbium-doped YAG slice crystal. The first erbium-doped YAG sheet crystal is used for generating 1.64 [mu] m laser which oscillates back and forth in a back-and-forth light path provided by the first resonant cavity; and the second erbium-doped YAG sheet crystal is used for generating 2.94 [mu] m laser which oscillates back and forth in a back-and-forth light path provided by the second resonant cavity. According to the high-power dual-wavelength erbium-doped solid laser provided by the invention, synchronous output of 1.64 mu m and 2.94 mu m dual-wavelength laser is realized, the multifunctionality and medical adaptability of the laser are enhanced, and multi-type treatment requirements of soft tissues and hard tissues can be met at the same time.

The invention relates to a laser crystal non-radiative decay life measurement method based on relaxation oscillation frequency analysis of a solid laser, which comprises the following core steps of: firstly, acquiring a laser intensity noise spectrum in real time by adopting a self-zero beat noise detection device (2) in a stable operation state of the solid laser (1); obtaining a relaxation oscillation frequency measured value of the laser through spectral line feature analysis; secondly, a relaxation oscillation frequency theoretical model is built based on a laser rate equation, and a theoretical function curve graph with the non-radiative decay life of the laser crystal as an independent variable and the relaxation oscillation frequency as a dependent variable is built in combination with actual operation parameters (including pumping power, cavity structure parameters and crystal characteristics) of the laser; and finally, matching the actually measured relaxation oscillation frequency with the frequency value in the theoretical curve, and determining the non-radiative decay life value of the laser crystal through abscissa inversion. The method breaks through the limitation of a traditional measurement method, can realize non-intrusive high-precision measurement in a continuous working state of the laser, and is particularly suitable for in-situ characterization and life evaluation of non-radiation attenuation dynamics of the laser crystal in a solid laser system.

The invention discloses a solid laser with a heat effect reducing structure, and relates to the technical field of lasers, the solid laser comprises a laser gain medium, a pump light source and a heat management module, the laser gain medium is arranged in a laser resonant cavity formed by at least one reflector, the pump light source is used for exciting the laser gain medium, and the heat management module is used for controlling the heat effect reducing structure. The heat management module comprises a heat conduction substrate, a plurality of micro-channel cooling structures arranged in parallel along the interior of the heat conduction substrate, a heat diffusion layer and a heat interface material. By installing the rectangular micro-channel cooling structure, local heat generated by the laser gain medium is efficiently absorbed and conducted, uniform cooling is achieved, local overheating, hot plate and thermal lens effects are effectively prevented, optical distortion and device deformation caused by thermal gradient on the surface are avoided, the overall thermal management efficiency is improved, and the service life of the laser is prolonged. The laser is ensured to work stably under a high-power operation condition, the service life of the device is prolonged, and the output beam quality is improved.

The service life characterization testing device comprises a light beam splitter, a high-stability laser frequency reference module, power detection equipment, a wavelength testing module, line width / relative intensity noise / frequency noise testing equipment, a control computer and software, a driving / temperature control power supply and the like. The output light of the tested single-frequency laser is divided into multiple paths through a plurality of light beam splitters, and the output light power, the output wavelength, the absolute wavelength change and the relative intensity noise / frequency noise are monitored respectively. According to the absolute wavelength change monitoring, light needs to pass through a high-stability frequency reference module and then pass through a PD to monitor the change value of the absolute wavelength. According to the invention, a plurality of parameters are monitored in a multi-channel monitoring mode, and the system has the advantages of simple parameter testing, comprehensive monitoring of life characterization parameters and the like, and is suitable for performance testing and life testing of a single-frequency solid laser, a single-frequency fiber laser, a single-frequency semiconductor laser and the like.

The invention discloses a high-power torsional mode cavity single-frequency laser based on a slab crystal, which belongs to the technical field of solid lasers and comprises two pumping sources, two pumping shaping mirror groups, two reflectors, a slab laser crystal, three quarter-wave plates, an electro-optic Q-switched crystal, a polarizer, a total reflection plano-concave cavity mirror and an output cavity mirror. Pump light emitted by the two pump sources passes through the two pump shaping lens sets and then passes through the two reflectors to be injected into the lath laser crystal, and the first quarter-wave plate and the third quarter-wave plate are combined to achieve the torsional mode cavity technology. The electro-optic Q-switched crystal, the second quarter-wave plate and the polarizer which are sequentially arranged are combined to modulate continuous light in the resonant cavity into pulsed light, and the total reflection plano-concave cavity mirror and the output cavity mirror are combined to serve as a cavity mirror of the resonant cavity. According to the invention, the existing pumping power limited to tens of watts can be improved to hundreds of watts, the existing single-frequency laser power limited to watt level can be improved to tens of watts, and the cooperative improvement of high power and single-frequency characteristics is realized.

The invention provides a high-speed and multi-dimensional spatial light field regulation and control device, which can realize high-speed regulation of multiple dimensions such as amplitude, phase, polarization and the like of a spatial light field. Comprising a pumping regulation and control system, a collimation focusing shaping system and a laser resonance system which are sequentially installed through a three-dimensional adjusting frame along a light path, and the three systems are located on the same horizontal optical axis and are vertically arranged. The pumping regulation and control system comprises a signal generator, a driving circuit and a pumping source; the collimating focusing shaping system comprises a collimating lens, a conical lens or a cylindrical lens and a focusing lens, the laser resonance system comprises a laser crystal and a laser resonant cavity, and the laser resonant cavity comprises a compact parallel plane cavity and an open type optical resonant cavity. Laser pulses with different amplitude characteristics can be output at different moments; laser pulses with different phase characteristics can be output at different moments; and laser pulses with different polarization characteristics can be output at different moments.

The invention provides a dual-wavelength laser therapy apparatus, which comprises a 980-nanometer and 532-nanometer laser coupler, a 980-nanometer laser, a 532-nanometer laser, a 980-nanometer laser optical fiber and a 532-nanometer laser optical fiber, and is characterized in that the 980-nanometer laser is connected with the 980-nanometer and 532-nanometer laser coupler through the 980-nanometer laser optical fiber, and the 532-nanometer laser is connected with the 980-nanometer and 532-nanometer laser coupler through the 532-nanometer laser optical fiber. And the 532 nanometer laser device is connected with the 980 nanometer and 532 nanometer laser couplers through the 532 nanometer laser device optical fiber. The laser therapy apparatus provided by the technical scheme of the invention replaces a laser therapy apparatus comprising a solid laser in the prior art, adopts the fiber laser, does not have the problem of instability of the solid laser, and is faster to start and low in power consumption.

The mid-infrared optical parametric oscillator pumped by the dual-wavelength nanosecond pulse solid laser can simultaneously output 1.9 micron laser and 2.1 micron laser, realizes broad spectrum / multi-wavelength output of the mid-infrared optical parametric oscillator, and can ensure that mid-infrared laser has excellent beam quality and relatively high output power. The output power of the 1.9 [mu] m optical fiber laser pumping source is hectowatt magnitude, and the 1.9 [mu] m optical fiber laser pumping source serves as a pumping source of a Ho crystal in the solid laser oscillator. In a Tm solid laser oscillator and a Ho solid laser oscillator, a resonant cavity comprises two plano-concave sub-cavities, the two plano-concave sub-cavities are a Tm crystal oscillation cavity and a Ho crystal oscillation cavity respectively, the two plano-concave sub-cavities share one output mirror, the Tm crystal oscillation cavity adopts a 793 nm semiconductor laser for pumping, and the Ho crystal oscillation cavity adopts a 1.9 [mu] m optical fiber laser pumping source I for pumping; in the phosphorus-germanium-zinc optical parametric oscillator, a planar four-mirror annular cavity is used as a single-resonance optical parametric oscillation cavity.

The invention discloses a generation system and method based on a vector light beam of any structure, and the system comprises a laser, a collimating and beam expanding element, a polarizing film, a first half-wave plate, a beam splitting cube, a polarization beam splitting cube, a reflector, a second half-wave plate, a quarter-wave plate, a Fourier lens, a spatial light modulator, a computer, and a camera. Two parallel light beams which are generated by a continuous wave solid laser and a half-wave plate and have an orthogonal polarization state are respectively irradiated on spatial light modulators which are loaded with different topological charge values and are used for customizing light beam holograms with any shapes and structures, are modulated by the spatial light modulators, and are coaxially superposed with a Fourier lens through a quarter-wave plate; and the customized vector light beam with any shape and uniform intensity can be generated. According to the invention, the direct mapping of a real object can be realized, the light beam quality is improved, and the polarization state is flexibly regulated and controlled.

The invention discloses a straight cavity type solid laser resonant cavity mirror assembling and adjusting device and method, belongs to the technical field of laser resonant cavity assembling and adjusting, and solves the problem that an existing solid laser resonant cavity mirror is low in assembling and adjusting precision. The device specifically comprises a short coherent light source which is connected with a coupler through an optical fiber; an output port of the coupler is connected with a measuring arm and a reference arm through two paths of optical fibers respectively; a combined output port of the coupler is connected with a photodiode through an optical fiber, and the photodiode is connected with a control unit. According to the method, the actual cavity length of the straight cavity type solid laser resonant cavity is accurately measured by adopting a short coherence interference measurement technology, then the parameter indexes of the cavity length are designed according to the solid laser resonant cavity designed in the earlier stage, an accurate assembly error value is obtained, then the cavity mirror of the resonant cavity is accurately assembled and adjusted, and the assembly and adjustment precision is high.

The invention discloses a 1319nm laser based on a torsional mode cavity and a lath configuration, which belongs to the technical field of solid lasers and comprises an oscillator stage, a pre-amplifier, a first-stage main amplifier and a second-stage main amplifier which are sequentially arranged, the oscillator stage generates a [mu] J magnitude narrow linewidth pulse laser and outputs the [mu] J magnitude narrow linewidth pulse laser to the pre-amplifier, the pre-amplifier amplifies the incident narrow linewidth pulse laser to an mJ magnitude and outputs the laser to the first-stage main amplifier, the first-stage main amplifier amplifies the incident narrow linewidth pulse laser to a dozens of mJ magnitude, and the second-stage main amplifier outputs the amplified laser to the second-stage main amplifier. The second-stage main amplifier amplifies the incident narrow-linewidth pulse laser to a magnitude of hundreds of mJ, and outputs the narrow-linewidth pulse laser to the second-stage main amplifier. The system outputs narrow-linewidth pulse laser with excellent light beam quality, and can be widely applied to the field of laser radar detection.

The invention provides a light generating system (1000) comprising a multi-chip laser package (2000), a luminescent material (200 ), and optics (500), wherein: (A) the multi-chip laser package (2000) comprises (i) a first series (51) of first solid state laser devices (110), configured to generate first laser light (111 ) having a first peak wavelength (λp1), (ii) a second series (52) of second solid state laser devices (120) configured to generate second laser light (121 ) having a second peak wavelength (λp2), and (iii) a third series (53) of third solid state laser devices (130) configured to generate third laser light (131 ) having a third peak wavelength (λp3); wherein the multi-chip laser package (2000) further comprises a support (2300) configured to support the solid state laser devices (110, 120, 130,...); (B) the first peak wavelength (λp1) and the second peak wavelength (λp2) are independently selected from the wavelength range of 440-490 nm, and the third peak wavelength (λp3) is selected from the range of 590-780 nm; (C) the luminescent material (200) is configured in a transmissive mode downstream of the first solid state laser devices (110) and is configured to convert at least part of the first laser light (111) into luminescent material light (201 ) having one or more wavelengths in the wavelength range of 490-590 nm and having a centroid wavelength (λcL); wherein λcL ≥ λp1+15 nm, λcL ≥ λp2+15 nm, and λcL ≤ λp3 - 15 nm; (D) the luminescent material (200) and, the second solid state laser devices (120), and the third solid state laser devices (130) are configured such that during operation of the second solid state laser devices (120) and the third solid state laser devices (130) the second laser light (121) and the third laser light (131) bypasses the luminescent material (200); (E) the light generating system (1000) is configured to provide in a first operational mode of the light generating system (1001) white system light (1001) comprising the luminescent material light (201), the second laser light (121), and the third laser light (131); and (F) the optics (500) are configured to one or more of (a) mix different light contributions to the system light (1001), and (b) beam shape the system light (1001).

The invention discloses a thermal lens self-adaptive double-resonant cavity pulse solid laser which comprises a total reflective mirror, an LD side pump gain module, a polaroid, a Q switch, a cube-corner prism, a first wedge lens group, a half-wave voltage switch, a first PBS prism, a first output mirror, a first reflecting prism, a second wedge lens group, a second output mirror, a second reflecting prism, a third wedge lens group and a second PBS prism. The Q switch comprises a lambda / 4 wave plate and a Q-switched crystal which are sequentially arranged on an output light path of the polaroid, the double resonant cavities comprise a short-cavity resonant cavity and a long-cavity resonant cavity, the short-cavity resonant cavity is composed of a first output mirror and a total reflective mirror, and the long-cavity resonant cavity is composed of a second output mirror and a total reflective mirror. According to the invention, through the self-adaptive thermal lens change design of the double resonant cavities, stable oscillation of the laser is ensured, so that the laser can keep highly consistent laser energy, pulse width and optical axis stability in a full pumping power range, and meanwhile, the laser pulse width is greater than 10ns when the single-oscillator-stage laser outputs large energy.

In an LD-pumped solid-state laser, where a solid-state laser crystal is excited by excitation light emitted from an LD to cause laser oscillation, and the resulting laser oscillation light of two frequencies is converted into a sum frequency, stable operation and cost reduction are achieved. [Solution] In an LD-pumped solid laser 1 comprising a solid laser crystal 19, an LD 11 that emits excitation light to excite the solid laser crystal 19, a resonator that resonates the light emitted from the solid laser crystal 19, and an optical wavelength conversion element 22 that converts the wavelength of solid laser oscillation light L21 and L22, a multiplexing means 21 is provided that receives the two solid laser oscillation light L21 and L22 from different directions and combines them into one, and the optical wavelength conversion element 22 converts the combined solid laser oscillation light L21 and L22 into a sum frequency.

The invention relates to the technical field of laser devices, and discloses a multi-bar series connection assembly and a pumping solid laser, the multi-bar series connection assembly comprises a plurality of bar modules which are arranged, two adjacent bar modules are arranged at intervals, and a bent and deformable metal foil is connected between two adjacent bar modules. And the two adjacent bar modules realize positive and negative electrode conduction through the metal foil connected between the two bar modules. By means of the mode, thermal stress in the multi-bar series connection assembly can be effectively released, the problem of laser bar cracking caused by hard connection adopted by a traditional structure is solved, the structural reliability and stability of the multi-bar series connection assembly are improved, and the service life of the multi-bar series connection assembly is prolonged.

The invention discloses a compact high-power semiconductor pump solid laser, which comprises a stimulated radiation mechanism, a coupling mechanism arranged at one end of the stimulated radiation mechanism and an adjusting mechanism arranged on the circumference of the stimulated radiation mechanism, and is characterized in that the stimulated radiation mechanism comprises a radiation cavity and a lens group arranged on the inner side of the radiation cavity; the gain medium is arranged between the lens groups; the coupling mechanism is arranged at one end of the lens group; a flow channel is formed in the inner side of the circumferential cavity wall of the radiation cavity; the coupling mechanism comprises a pump light source and a focus lens group arranged at one end of the pump light source; the focusing lens group is in sliding connection with the radiation cavity, and an adjusting system is arranged in the micro-fluidic chip; therefore, the situation that under high-power pumping, a large amount of heat is generated after the laser crystal absorbs the pumping light, the temperature of the crystal rises, and then the output performance and stability of the laser are affected is greatly reduced.

The utility model provides a solid laser crystal heat sink structure, which relates to the field of laser crystal heat dissipation and comprises a first shell and a second shell combined with the first shell to form an accommodating space, a TEC semiconductor cooler and a pipeline are arranged in the accommodating space, a gap is reserved between the pipeline and the TEC semiconductor cooler, and the gap is filled with heat-conducting silica gel. The device further comprises a third shell arranged in the TEC semiconductor refrigerator, a laser crystal is arranged in the third shell, the laser crystal and the third shell form an interlayer, and an indium layer is arranged in the interlayer. According to the utility model, the TEC semiconductor cooler can accurately control the temperature of each part of the laser crystal, so that the heat dissipation capability of each part is matched with the heat distribution of the laser crystal.

The invention belongs to the field of high-power solid lasers, and particularly relates to a linkage locking sheet-shaped amplifier sealing bottom plate structure convenient to disassemble and assemble. The structure comprises a bottom plate, a driving sliding block mechanism, a pi-shaped sliding frame, a sliding linkage mechanism and a positioning locking mechanism. The pi-shaped sliding frame is driven to slide by driving linear movement of the sliding block mechanism, and the locking rods of the multiple positioning locking mechanisms are synchronously controlled through the sliding linkage mechanism, so that rapid locking and unlocking operation of the sealing bottom plate is achieved. And a pre-tightening spring in the positioning and locking mechanism provides automatic pulling force, so that a firm locking effect is ensured. The linkage locking mechanism is used for replacing a screw fixing mode in the prior art, mounting and dismounting of the sealing bottom plate can be rapidly completed only through simple sliding operation, the operation process is greatly simplified, the maintenance difficulty is reduced, and the working efficiency is effectively improved.