513results about "Laser cooling arrangements" patented technology

The invention relates to the technical field of lasers, in particular to a laser heat management device and a control method thereof, the laser heat management device comprises a cooling substrate, the cooling substrate is internally provided with a micro-channel, the micro-channel comprises a main channel and a branch channel, and the main channel is used for circulating cooling water; the cooling substrate is provided with a detection control area, the detection control area is located at the joint of the branch channel and the main channel, the detection control area is provided with a phase change micro-valve and a detection assembly, the detection assembly is used for collecting temperature data, the phase change micro-valve comprises a phase change material and a flexible separation blade, and after the valve is opened, the phase change material generating phase change pushes the flexible separation blade, and the phase change micro-valve is connected with the detection assembly. The communication state of the main channel and the branch channel is controlled; the main controller is used for receiving the temperature data of all the detection control areas and controlling the valves of the corresponding detection control areas to be opened or closed according to the deviation between the temperature data and the target temperature. The temperature gradient of the laser can be reduced at least so as to ensure that the laser realizes a long-term stable working state.

The invention provides a stable control system of a solid-state spin ensemble sensor pump light source, and belongs to the field of quantum precision measurement, and the stable control system comprises a data acquisition module which is used for detecting feedback signals of the pump light source in real time, including power, driving current, temperature and a magnetic field; the control unit is used for weighting and fusing the feedback signals, optimizing weighting parameters of the feedback signals by taking the minimum output noise of the pump light source as a target, determining fusion control parameters and inputting the fusion control parameters into the self-adaptive PID controller, and the self-adaptive PID controller outputs control signals; the current driving module is used for adjusting the driving current of the pump light source according to the control signal; the invention further provides a stability control method. A closed-loop multi-stage composite feedback control system of current, temperature, light intensity and a magnetic field is established, fusion control parameters are formed through weighted fusion, and a self-adaptive PID controller outputs control signals according to the deviation between the fusion control parameters and a set value and is used for adjusting output current; and the influence of external disturbance on light source performance is effectively suppressed and compensated.

The utility model discloses a laser with an expandable pumping source and portable laser processing equipment, and belongs to the technical field of lasers. Comprising at least one pumping source module, and the pumping source module comprises at least one pumping source body and a heat dissipation assembly; the heat dissipation assembly comprises a heat dissipation device and a heat dissipation base, the heat dissipation base is connected to one side, in the first direction, of the heat dissipation device, and the pumping source body is detachably arranged on the other side, in the first direction, of the heat dissipation base; according to the laser with the expandable pumping source, a corresponding number of pumping source modules can be matched according to the requirements of the laser with the expandable pumping source, so that the pumping source expansion of the laser is realized, and the corresponding pumping source body is cooled through the cooling assembly in the corresponding pumping source module, so that the cooling effect of the laser with the expandable pumping source is ensured, and the service life of the laser is prolonged. Meanwhile, due to the modular arrangement of the pumping source and the heat dissipation assembly, the reusability and adaptability of the pumping source module are improved, and the design and manufacturing cost is reduced.

Various optical systems for use in a light pulse atomic interferometer (LPAI)-based one-, two-, or three-axis accelerometer or gyroscope are disclosed. As an LPAI accelerometer or gyroscope may employ many different laser beams to implement the LPAI functionality, ways of combining these different laser beams to thereby simplify the optical systems are desired. The cooling laser beam portion of the optical system may be simplified using one or more reflective grating chips. The Raman laser beam optics may be simplified using combiners and separators. For LPAI systems sensing along three axes, various optical switching schemes may be employed, including ones that generate variable data-rates with a primary sensing axis having a higher data-rate than the secondary sensing axes. Further, by combining various laser beams in a time-multiplexed manner, the number of optical fiber tethers to a sensor head may be reduced.

The invention relates to the technical field of lasers, in particular to an air-cooled fiber laser. The air-cooled fiber laser comprises a heat dissipation structure which comprises a pumping source radiator and a fiber coiling radiator which are connected, the pumping source radiator is provided with a first air channel, the fiber coiling radiator is provided with a second air channel, and the first air channel and the second air channel are communicated with each other; the pumping source is arranged on the pumping source radiator so as to transfer heat into the pumping source radiator; the active fiber is wound on the fiber coiling radiator; a forced heat exchanger. The pumping source radiator and the coiled fiber radiator are separated, and the independently designed structure breaks through the limitation that the size is difficult to reduce due to mutual restriction of the traditional integrated radiating structure. Due to the modularized and distributed layout, each heat dissipation unit can be subjected to optimal size design according to the thermal load of the heat dissipation unit, so that the structure is compact and reasonable, the size of the laser is reduced, the overall size and weight are reduced, and portability and light weight are realized.

The invention relates to the technical field of high-power femtosecond laser manufacturing, and discloses a high-power industrial femtosecond laser water cooling structure and a thermal stability optimization method thereof. Comprising the steps that an adjustable flow resistance valve driven by a shape memory alloy is arranged in a cooling water channel in a machine shell water cooling plate, and a temperature sensor is embedded in a key position of the machine shell water cooling plate; a paraffin-based or metal-based phase change material is filled at the bottom of the heat dissipation chute of the shell water cooling plate; an ultrathin uniform-temperature plate is embedded in the water-cooling plate of the casing, so that heat of local hot spots, such as heat near a reflecting mirror seat, on the water-cooling plate of the casing is quickly diffused to the whole water-cooling plate; bionic guide vanes are arranged in the cooling water channel; an aerogel heat insulation layer is additionally arranged between the machine shell water cooling plate and the outer shell, the machine shell water cooling plate and the outer shell are connected through a titanium alloy connecting piece with a low expansion coefficient, and a flow channel cover plate and the machine shell water cooling plate are flexibly connected through a metal corrugated pipe.

The invention relates to the technical field of high-power femtosecond laser manufacturing, and discloses a high-power industrial femtosecond laser water cooling structure and a manufacturing method thereof. Comprising the steps that any one of a variable cross-section spiral flow channel, a bionic fin flow channel or a micro-channel array is directly machined in a machine shell water-cooling plate through the five-axis linkage precision machining technology or the micro-nano machining technology, or the printer shell water-cooling plate is integrated through the metal additive manufacturing technology; a reflector base, a heat dissipation chute and a cooling water channel are integrated in the machining process of the water cooling plate of the machine shell; carrying out material and surface treatment process operation; assembling process operation is carried out, a reflecting mirror base is matched with a mortise and tenon joint structure and a machine shell water-cooling plate through high-precision positioning pins, the reflecting mirror base and the machine shell water-cooling plate are rigidly connected in a vacuum brazing or laser welding mode, and a light guide side plate and a runner cover plate are designed into standard modules; the light guide side plate and the runner cover plate are quickly assembled through magnetic attraction positioning and spring buckles.

A portable air-cooled fiber laser device disclosed by the present invention comprises a box body, a laser pumping source, a fiber output assembly, a power supply assembly, a heat dissipation engine and a control circuit are integrated in the box body, the power supply assembly adopts a drawable structure, a replaceable battery is arranged in the power supply assembly, and energy supply without an external power supply is realized. The heat dissipation engine is arranged in a sandwich type structure and is composed of a heat dissipation fin set and heat pipes embedded in the heat dissipation fin set, a transverse ventilation heat dissipation channel is formed through a heat dissipation fan, and efficient heat management is achieved. Connection with a mobile terminal or computer equipment in a wired or wireless mode is supported, and remote control over the operation state of the laser is achieved. The device is compact in structure, efficient in heat dissipation and convenient to carry, has good heat dissipation performance, independent power supply capacity and environmental adaptability, is suitable for application scenes such as multi-scene field operation and emergency use, and has good practicability and popularization value.

The utility model discloses a cooling structure and a laser, and relates to the technical field of lasers, the cooling structure is used for a power supply module, and the cooling structure comprises a plurality of substrates and cooling pipes; each substrate is provided with at least one heat conduction area, and the heat conduction areas can receive heat generated by a power module. According to the technical scheme, the multiple substrates are arranged, at least one heat conduction area is arranged on each substrate, the purpose of dispersing the whole substrate into the multiple heat conduction areas is achieved, the heat conduction areas absorb heat generated by the power module, compared with a traditional whole-block arrangement mode, the heat conduction efficiency is improved, and the heat conduction efficiency is improved. According to the cooling structure, the plurality of substrates can be selectively arranged on the power supply module needing heat dissipation, so that unnecessary space occupation is reduced, the size and the weight are further reduced to a certain extent, and the cooling structure has a light-weight use effect.

The invention discloses a laser heat dissipation system and method and an air-cooled fiber laser, and relates to the technical field of lasers, the disclosed laser heat dissipation system comprises a data acquisition module, a main control module, a fan driving module and a heat dissipation fan, the main control module is electrically connected with the data acquisition module and the fan driving module, and the fan driving module is electrically connected with the heat dissipation fan. The fan driving module is electrically connected with the cooling fan; the data acquisition module is used for acquiring the output power, the input current, the input voltage and the temperature value of the laser; the main control module is used for determining a reference fan control signal according to the output power and correcting the reference fan control signal according to the temperature value and / or an efficiency value calculated through the output power, the input voltage and the input current to obtain a target fan control signal; and the fan driving module is used for controlling the rotating speed of the cooling fan according to the target fan control signal. The heat dissipation efficiency of the laser heat dissipation system can be improved.

The invention provides a high-power wide-spectrum long-wave infrared femtosecond laser generation method, and relates to the technical field of infrared ultrafast laser. According to the method, the 1.5 [mu] m pumping BGSe crystal is adopted, compared with a traditional 1 [mu] m pumping BGSe crystal, the heat accumulation effect is greatly reduced, and the operation stability of the system is remarkably improved in combination with a water-cooling heat dissipation device. Through crystal cutting angle optimization and phase matching design, 10-16 [mu] m wide-spectrum long-wave infrared femtosecond laser output is achieved, the power reaches 100 mW, and the application requirements in the fields of molecular spectrum recognition, environment monitoring and the like are met.

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 provides a high-power refrigerant direct-cooling laser without a cold plate, which comprises a pump source module, a resonant cavity module, an optical device module and an electrical device module, and is characterized in that an optical chip in the pump source module is fixed on a box-type first base, a pipeline is pre-buried in the first base, and the pipeline contains a refrigerant; an optical fiber in the resonant cavity mode is wound in an optical fiber groove in a columnar second base in a three-dimensional manner, a pipeline is arranged in the heat dissipation base, and a refrigerant is arranged in the pipeline; an optical fiber in the optical device module passes through a third tubular base, a pipeline is arranged in the third base, and a refrigerant is arranged in the pipeline; electrical devices in the electrical device module are arranged on a box-type substrate, a pipeline is arranged in the substrate, and a refrigerant is arranged in the pipeline. A traditional cold plate is removed, devices with flow channels are connected together to form a cooling loop, the devices of the laser are fixed on a base to form a stable structure, and the modularized high-power laser is formed.

The utility model provides a heat radiation device used for a laser and a laser module comprising the heat radiation device, in one embodiment, the heat radiation device comprises a laser gain medium having a first surface and a second surface; the antireflection film is arranged on the first surface of the laser crystal; the reflecting film is arranged on the second surface of the laser crystal; and the heat sink is used for supporting and fixing the laser gain medium and absorbing heat generated by the laser gain medium, and the heat sink is made of single crystal silicon carbide. The heat dissipation device provided by the utility model is low in processing cost, and facilitates the popularization and application of the disc laser.

Embodiments pertain to a compact fiber packaging apparatus configured to guide an active fiber as part of a high power fiber laser. The apparatus may comprise a base having a front side and a back side. The front side may comprise a front spiral groove of varying radii increasingly extending from an innermost front loop having an innermost radius to an outermost front loop having an outermost radius, and the back side may comprise a back spiral groove of varying radii decreasingly extending from an outermost back loop having an outermost radius to an innermost back loop having an innermost radius. The front spiral groove extends from the innermost front loop to the outermost front loop which connects with the outermost back loop of the back spiral groove to terminate at the innermost back loop.

The invention relates to the field of microcavity photonics and the technical field of control, and provides a temperature locking method and device based on an optical microcavity absorption peak position, and the method comprises the steps: employing a tunable laser to output continuous light, and obtaining a transmission spectrum power curve; manually adjusting the output wavelength of the tunable laser, and recording the wavelength interval as a rough absorption peak position when a wave band with significantly reduced transmission spectrum power is detected; automatically adjusting the output wavelength of the tunable laser, and continuously scanning in the rough wavelength interval of the absorption peak position to obtain the absorption peak position; the offset between the position of the absorption peak and the position of a target absorption peak of the optical microcavity in a natural room temperature state is calculated, and the detected position of the absorption peak is stably maintained at the position of the target absorption peak by automatically heating or refrigerating the optical microcavity. Through the method, the problems of heat conduction path delay and thermal field gradient between the microcavity and the sensor are avoided, and the response speed and precision of wavelength drift compensation are improved.

A method and system for generating deep ultraviolet (DUV) laser light is disclosed, in one embodiment the DUV laser system includes a fiber laser source configured to emit a poised fundamental laser beam in the near-infrared with a pulse duration of less than 400 femtoseconds (fs), a nonlinear crystal assembly comprising first, second, and third nonlinear crystals that is configured to convert the fundamental laser beam to produce a fifth harmonic laser beam having a wavelength in a range from 200 nanometers (nm) to 230 nm, and at least one compensation plate disposed in at least one position preceding at least one of the first, second, and third nonlinear crystals and configured such that a pair of pulsed laser beams transmitted through the at least one compensation plate are spatially and temporally overlapped within the at least one of the first, second, and third nonlinear crystals.

A passively, Q-switched laser is described. The laser may operate at an eye-safe lasing wavelength of 1.34 microns and use a gain element of Nd:YVO4 and a saturable absorber element of V:YAG with a space separating the gain element and saturable absorber element. The Q-switched laser is pumped by a grating stabilized laser diode. The laser may be used in laser ranging applications.

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 application discloses a step variable pressure type micro-channel heat dissipation structure and a high-power laser cut-off light screen, and the structure comprises a flow channel (3), a gradually widened micro-channel (4), a first step variable pressure structure (5) and a second step variable pressure structure (6). The first step variable pressure structure (5) and the second step variable pressure structure (6) comprise a plurality of step-by-step increased elliptical cylinder arrays, the number of the elliptical cylinders is step-by-step increased, the length of the short axis of the elliptical cylinder is step-by-step decreased, the fluid flow cross-sectional area is step-by-step decreased, and the flow speed is step-by-step increased to form a jet effect to accelerate the fluid, and finally the fluid enters the gradually widened micro-channel (4) at a higher flow speed to realize flow heat exchange. The step variable pressure structure with the step-by-step increased number of elliptical cylinders, the step-by-step decreased length of the short axis and the step-by-step decreased total flow cross-sectional area at the micro-channel inlet section can rapidly and gradiently increase the pressure to accelerate the fluid, and effectively solve the problems of excessive and concentrated pressure at the micro-channel inlet.

The invention discloses a temperature control method and device for a laser and a medium, and relates to the technical field of temperature control, and the method comprises the steps: obtaining the operation parameters of a pump source assembly in a laser system, and carrying out the data query and interpolation calculation through a predefined current heat mapping table based on the pump source current in the operation parameters, and generating a thermal load prediction value; based on the thermal load predicted value and according to the working mode of the laser, a refrigeration control signal is generated, and the refrigeration control signal is sent to an execution component of the refrigeration system so as to control at least one of the rotating speed of a compressor, the opening degree of an expansion valve and the rotating speed of a fan; and calculating a current fine tuning coefficient according to the difference between a target temperature value in the thermal load predicted value and an actual temperature value, performing overall current compensation according to the difference between a power set value in the thermal load predicted value and an actual power value, and outputting an independent current adjustment value and a total current adjustment value of each pump source assembly.

The invention relates to the technical field of light condensing devices, in particular to a lamp pump laser light condensing cavity water cooling system capable of rapidly and uniformly dissipating heat. According to the technical scheme, the device comprises a control system and a laser communicated with the control system, the laser comprises a cavity, and the inner surface of the cavity is provided with a reflecting layer and a quartz layer covering the outer surface of the reflecting layer; the middle water spacing rings are arranged at intervals in the axial direction of the cavity, the end water spacing rings are arranged at the two ends of the cavity, the interior of the cavity is divided into transverse water cooling channels through the middle water spacing rings and the end water spacing rings, and the inner wall of the cavity is provided with a guide groove and a telescopic folding sealing ring arranged in the guide groove in a sliding mode. And the folding sealing ring seals a gap between the middle water spacing ring and the cavity wall. According to the invention, through collaborative design of multiple water cooling channels and intelligent monitoring, the heat dissipation uniformity of the lamp pump laser condensation cavity is significantly improved to optimize the beam quality, and the overall performance, stability and long-term operation reliability of the laser are improved.

The application discloses a temperature control method of a liquid cooling system, which comprises the following steps: obtaining a set value of a water supply temperature; operating a main pump; operating a secondary pump; operating a compressor; opening an expansion valve; obtaining suction temperature, low-pressure pressure, superheat and saturation temperature of the compressor; adjusting the opening degree of the expansion valve according to the suction temperature, the low-pressure pressure, the superheat and the saturation temperature; obtaining an actual value of the water supply temperature; and controlling the opening or closing of a refrigeration electromagnetic valve, a cold gas bypass electromagnetic valve and a hot gas bypass electromagnetic valve of the compressor according to the temperature difference between the set value of the water supply temperature and the actual value of the water supply temperature. By adjusting the opening degree of the expansion valve, the refrigerating capacity of the compressor can be finely adjusted when the compressor is refrigerating, so that the temperature control precision is improved. By combining the opening degree control of the expansion valve with the opening or closing of the refrigeration electromagnetic valve, the cold gas bypass electromagnetic valve and the hot gas bypass electromagnetic valve, the precision control of the refrigerating capacity of the compressor can be improved, and the requirement of high-precision temperature control can be met.

The invention discloses a water, electricity and light independent separation multi-cavity laser heating system and device. The system comprises a laser generating module, a light beam guiding module, a double-cavity isolation module and a variable light spot adjusting module. The laser generating module outputs a laser beam, the light beam guiding module enables the laser beam to be transmitted according to a preset path through light path steering, the double-cavity isolation module comprises a laser action cavity and a cooling medium cavity which are mutually independent, and the variable light spot adjusting module is integrated in the laser action cavity to adjust the dimension of a light spot. The device comprises a frame assembly, a laser emitting part, a reflecting part, a lens adjusting part and a cooling part, the laser emitting part outputs light beams, the light beams enter a laser cavity after being turned by the reflecting part, the lens adjusting part adjusts the light spot width, and the cooling part is communicated with a water path of a lens fixing seat through a water cooling pipe to achieve cooling. The laser action cavity and the cooling medium cavity are subjected to double-cavity separation, and the problems that when light spots are adjusted, a pipeline is prone to being pulled and large in size, and cooling is affected by laser radiation are solved.

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 relates to the technical field of heat dissipation, in particular to a heat dissipation device and method for a high-power-density device. The heat dissipation device comprises a heat dissipation bottom face, heat dissipation fins and a heat conduction layer. The heat dissipation fins and the heat conduction layer are connected to the two sides of the heat dissipation bottom face. The heat conduction layer is in contact with the high-power-density device, and the contact area of the heat conduction layer and the high-power-density device is smaller than the contact area of the heat conduction layer and the heat dissipation bottom face. By arranging the heat conduction layer, heat generated by the high-power-density device can be radiated in the direction perpendicular to the contact face of the heat dissipation device and the high-power-density device and can be conducted to the periphery of the high-power-density device along the heat conduction layer at the same time. Compared with a traditional radiating fin or radiator, the radiating fin or radiator has the advantages that the radiating effect is greatly enhanced, the heating power density upper limit of high-power devices such as a laser, an LED (light-emitting diode) and a TR assembly under the condition that the radiating fin or radiator is singly used is improved, and the use cost of the high-power density devices is reduced.

An apparatus includes a frame structure forming a circumference around an opening, a receptacle along the circumference, wherein the receptacle is configured to allow a secure placement of an optical element such that electromagnetic waves traveling from the opening impinge upon the optical element; N heating elements attached to the frame structure substantially along entirety of the circumference, where N is a positive integer; and a radiation reflector disposed along the circumference of the frame.

The invention provides a laser chamber, a gas laser apparatus, and a manufacturing method of an electronic device. A laser chamber according to one aspect of the present disclosure is a laser chamber of a gas laser device that outputs laser light, the laser chamber being provided with: a container filled with a laser gas; a first electrode extending in a first direction and disposed inside the container; a second electrode extending in the first direction and disposed at a position closer to the inner wall of the container than the first electrode in a state of facing the first electrode in a second direction perpendicular to the first direction; a fan that causes the laser gas to flow in a discharge space between the first electrode and the second electrode; a plurality of heat pipes disposed on the inner wall of the container; and a plurality of heat exchangers disposed in the container so as to be separated from each other.

The present application relates to the technical field of laser, and especially relates to a heat dissipation system and a laser device. The heat dissipation system is used for dissipating heat for a laser, and the heat dissipation system comprises a refrigeration mode and a standby mode. The heat dissipation system comprises a compressor, a condenser, a cold plate and a functional device. The cold plate is used for cooling the laser. The functional device is used for throttling when the heat dissipation system is in the refrigeration mode, and is used for throttling and heat exchanging when the heat dissipation system is in the standby mode. The compressor, the condenser, the functional device and the cold plate are sequentially and circularly connected, and form a circulating loop of refrigerant. The laser device comprises the heat dissipation system. The present application provides a heat dissipation system and a laser device, so as to at least alleviate the technical problems that the cooling part of the laser is large in size, the cooling part is prone to condensation and frost when the laser is not started, and the compressor is prone to liquid compression damage.

The invention discloses a side pumping structure adopting staggered arrangement of LDs, and belongs to the technical field of high-power all-solid-state lasers, the side pumping structure comprises a laser crystal rod, a pumping module and a cooling system, the pumping module is composed of a plurality of circles of LD bar strip arrays, the LD bar strip arrays tightly surround the outer side of the laser crystal rod, the LD bar strip arrays comprise a plurality of LD bar strips, and the LD bar strips are arranged on the outer side of the laser crystal rod. The cooling system is integrated outside the pumping module, a quartz tube is sleeved on the outer side of the laser crystal rod, a high-reflection film is arranged on the outer wall of the quartz tube, and cooling water is arranged between the laser crystal rod and the quartz tube. By the adoption of the structure, due to the staggered arrangement, pump light does not enter a few axial positions of the crystal rod in a concentrated mode any more, but is dispersed in the axial direction; in this way, the absorption length of the pump light by the crystal rod is effectively lengthened, local energy accumulation is avoided, and heat sources in the crystal rod are distributed more evenly and axially.