703results about "Laser cooling arrangements" patented technology

The embodiment of the invention provides a laser control method and device, electronic equipment and a laser. The method comprises the following steps: determining a target pump source temperature corresponding to a pump source in the laser, wherein the target pump source temperature is the pump source temperature when the pump source in the laser can operate according to a preset use condition in the operation process of the laser; determining target cooling parameter information adopted during operation of the laser based on the target pump source temperature, wherein the target cooling parameter information is used for indicating circulating cooling liquid temperature and / or circulating cooling liquid flow required for cooling the laser to enable a pump source in the laser to reach the target pump source temperature; and based on the target cooling parameter information, controlling a water cooling machine associated with a laser to supply circulating cooling liquid. According to the scheme, the laser can be protected, and laser damage or power reduction caused by pump burning can be reduced.

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 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 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 utility model relates to the technical field of temperature control devices, and discloses a secondary temperature control device of a laser. The secondary temperature control device for the laser comprises an external cooling fin, a mounting shell, a temperature control circuit board, a first lens, the laser, a thermistor and aerogel, the top of the external cooling fin is fixedly connected with the mounting shell, the mounting shell is filled with the aerogel, the temperature control circuit board is arranged in the aerogel, and the first lens is arranged on the temperature control circuit board. A first lens is slidably arranged in the middle of the temperature control circuit board, a laser is mounted on the temperature control circuit board, a plurality of heat conduction pipes are arranged on the first mounting frame, and second mounting seats are fixedly connected to the front side and the rear side of the first mounting frame. A two-stage temperature control system is jointly constructed through the internal temperature control assembly and the external thermoelectric refrigerating unit and cooling fins, and it is ensured that the core area of the adjustable laser is maintained within the precise specified temperature range.

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 discloses an ultra-stable laser digital automatic locking system and an automatic locking method, and relates to the technical field of ultra-stable laser frequency automatic locking. The ultra-stable laser digital locking system comprises a frequency locking circuit module and a frequency locking laser module. Specifically, according to the system, temperature locking and frequency locking are integrated in one frequency locking circuit module; the temperature of an optical reference cavity of the frequency locking laser module and the working frequency of the frequency locking laser module are simultaneously locked through an FPGA and a matched temperature analog-to-digital conversion unit, a frequency locking analog-to-digital conversion unit, a signal monitoring analog-to-digital converter, a temperature control unit and a frequency control unit. Compared with a digital-analog hybrid circuit in a traditional scheme, the number of components in the system is greatly reduced, the anti-interference capability is enhanced, and the adjustment precision and the stability are obviously enhanced.

The invention provides a system and a method for automatically optimizing the power of a frequency doubling laser, and relates to the technical field of laser. The high-temperature frequency doubling furnace comprises an LBO crystal and a heating sheet, the LBO crystal is used for carrying out high-temperature frequency doubling on laser emitted by the infrared laser, and the heating sheet is used for heating the LBO crystal; the dichroic mirror is used for transmitting the frequency-doubled laser and reflecting and filtering the non-frequency-doubled laser; the spectroscope is used for dividing the frequency-doubled laser into reflected light and transmitted light; the power meter is used for measuring the power of the reflected light; and the temperature controller is used for controlling the heating plate to heat the LBO crystal according to the reflected light power fed back by the power meter so as to adjust the temperature of the LBO crystal and enable the power of the reflected light to fluctuate within a preset range. According to the method, the frequency doubling power of the laser subjected to high-temperature frequency doubling through the LBO crystal can be kept stable and is not influenced by environment temperature fluctuation.

A nonlinear crystal flexible clamping and temperature control device comprises a clamping seat, a top face clamping block, a side face clamping block, a stud, a compression spring, a nut, a window mirror pressing ring, a wave spring, a window mirror gasket, a window mirror, a window mirror limiting block, a nonlinear crystal, silicon rubber, a thermistor and a ceramic heating piece. The flexible clamping device exerts pre-tightening force on the nonlinear crystal in the horizontal direction and the vertical direction through the compression spring, and meanwhile flexible clamping of the nonlinear crystal is achieved in a silicone rubber dispensing fixing mode. The temperature control device achieves accurate control over the temperature of the nonlinear crystal in the mode that a thermistor collects temperature signals and a ceramic heating piece heats a clamping base. The flexible clamping and temperature control device disclosed by the invention has the characteristics of performing thermal expansion compensation on the nonlinear crystal, being high in mechanical resistance and temperature control precision, uniform in crystal heat distribution and the like.

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 provides a detection device for an air jet loom, and relates to the technical field of woven fabric detection, the detection device comprises a case and a laser generator, a detection assembly is installed on the case, the detection assembly comprises a first laser receiver and a second laser receiver, a suction assembly is installed on the case, the suction assembly comprises a partition plate and a suction port, and the partition plate and the suction port are arranged on the case. The detection device comprises a machine box, a partition plate is installed on the machine box, a lifting assembly is installed on the machine box, the lifting assembly comprises a motor and a lead screw, a filtering assembly is installed on the partition plate, and the filtering assembly comprises an air bellow and a filtering net. The cloth detection structure is prevented from being interfered by chippings, impurities and the like, the reliability of a detection result is guaranteed, chipping and impurity cleaning work is facilitated, the chipping and impurity absorption effect is guaranteed, the detection work is not affected in the cleaning process, use is more convenient, and the cloth quality detection device is suitable for cloth quality detection of the air jet loom.

The present application discloses embodiments of a laser beam dump assembly. In one embodiment, the laser beam dump assembly includes a beam dump housing having a housing body with a passage formed therein, wherein the passage is sized to allow an incident laser beam to propagate therethrough into an interior volume formed in the housing body. The laser beam dump assembly further includes a beam scattering member having curvilinear scattering surface configured to scatter or reflect a first portion of the incident laser beam and allow a second portion of the incident laser beam to be absorbed by the scattering member as thermal energy. A heat sink is coupled to the beam dump housing in thermal communication with the beam scattering member, wherein the heat sink is configured to absorb and dissipate the thermal energy from the beam scattering member.

The invention discloses a laser cooling device which comprises a circulating cooling device, a locking device is arranged at the bottom of the circulating cooling device, a laser head is arranged in the circulating cooling device, the circulating cooling device comprises a first cooling plate, a second cooling plate is arranged on one side of the first cooling plate, and the first cooling plate comprises cooling fins. S-shaped circulating cold and hot pipes are arranged on the inner sides of the heat dissipation fins in a penetrating mode, water inlets are formed in one corners of the upper ends of the first cooling plate and the second cooling plate, water outlets are formed in the opposite corners of the inclined sides of the water inlets, and a plurality of clamping devices are arranged at the upper ends of the first cooling plate and the second cooling plate. The product has the advantages that the design of the locking device and the clamping device provides higher stability, the cooling effect reduction or equipment damage caused by the looseness of the cooling system is avoided, the clamping device ensures the accurate alignment of the cooling plates through the positioning holes, the guide columns, the locking bolts and other components, and the product quality is improved. And the anti-vibration capability is enhanced.

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.

In some implementations, a connection assembly includes a sleeve body defining a sleeve, a first electrical contact element embedded in the sleeve body, and a second electrical contact element embedded in the sleeve body, where the sleeve body electrically isolates the first electrical contact element from the second electrical contact element. The connection assembly may include a first wire electrically connected to the first electrical contact element within the sleeve body, and a second wire electrically connected to the second electrical contact element within the sleeve body.

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 discloses an optical fiber laser tube shell, which is used for packaging an optical fiber laser or other laser generating components, and heat dissipation fins for air cooling are integrally formed on the lower surface of a bottom plate of the laser tube shell, so that the heat resistance can be effectively reduced, and efficient heat dissipation can be realized. A refrigerant pipeline can also be embedded in the bottom plate of the laser tube shell, and the refrigerant pipeline can be used for circulating refrigerants such as phase change refrigerants or water; a side plate of an ordinary laser tube shell is omitted, materials are saved, the device is thinned, meanwhile, the packaging mode and process are simpler, in addition, due to the multi-area independent packaging mode, part of parts can be replaced without opening the whole package when the parts are damaged, and the cost is reduced. And the influence on the stability of the whole device when part of devices are damaged is reduced to the maximum extent.

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.