57 results about "Mid infrared laser" patented technology

A first pumping source and a second pumping source are combined through a pumping beam combiner and are coupled into an erbium-doped fluoride fiber and a high-reflectivity fiber bragg grating, and the erbium-doped fluoride fiber and a low-reflectivity fiber bragg grating form a laser resonant cavity. The intermediate infrared laser is output through the low-reflectivity fiber bragg grating, the cladding light filter and the optical fiber end cap; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating have the same grating period, the fourth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4F9 / 2 energy level to the 4I9 / 2 energy level, and the fifth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4I11 / 2 energy level to the 4I13 / 2 energy level; by adjusting the power of the first pumping source and the second pumping source, the net gain of laser transitions from the 4F9 / 2 energy level to the 4I9 / 2 energy level and transitions from the 4I11 / 2 energy level to the 4I13 / 2 energy level is regulated and controlled, and switching of laser working wavelengths is achieved.

The invention discloses a fuel gas leakage detection system based on mid-infrared laser, relates to the technical field of fuel gas detection, and aims to solve the problems that a large-area region is difficult to cover quickly and only close-range detection can be carried out in an existing laser fuel gas leakage detection method. The gas leakage detection system comprises a laser emission module, an infrared imaging detector module and a data processing module, the laser emission module is used for emitting an intermediate infrared laser beam to a to-be-detected area; the infrared imaging detector module is used for collecting an infrared spectrum signal of the to-be-detected area in real time; the infrared spectrum transmitting module is used for transmitting the infrared spectrum signal to the data processing module; and the data processing module is used for processing the received infrared spectrum signal to obtain a gas leakage detection result of the to-be-detected area. The method is suitable for detecting gas leakage in a natural gas pipeline and a liquefied petroleum gas storage tank area.

The invention provides a mid-infrared optical frequency comb. The mid-infrared optical frequency comb comprises a near-infrared optical frequency comb seed source of a polarization-maintaining all-fiber structure; the all-fiber nonlinear amplification and pulse compression module is connected with the near-infrared optical frequency comb seed source through a polarization maintaining fiber and is used for amplifying the power of the seed light and compressing the pulse width after generating a linear chirped pulse; the all-fiber nonlinear spectrum broadening module is connected with the all-fiber nonlinear amplification and pulse compression module through a polarization maintaining fiber and is used for broadening a laser spectrum; the difference frequency module is used for receiving the laser pulse processed by the all-fiber nonlinear spectrum broadening module and generating an intermediate infrared laser pulse through intra-pulse self-difference frequency; wherein the seed source, the all-fiber nonlinear amplification and pulse compression module and the all-fiber nonlinear spectrum broadening module are connected through a polarization maintaining fiber to form an all-fiber integrated structure. By adopting the scheme, the anti-interference capability of the system can be enhanced, miniaturization and high operation reliability are realized, the debugging process is simplified, and the difference frequency efficiency is improved.

The application relates to the field of laser technology, in particular to a device and a method for generating wide-tuning narrow-line-width mid-infrared laser, wherein the pump light emitted by a nanosecond pulse OPO base frequency pump source is reflected to a beam splitter by a full reflection mirror after passing through a first adjuster; the pump light emitted by a continuous wave OPO base frequency pump source is irradiated to the beam splitter after passing through a second adjuster; the two beams of pump light are combined after passing through the beam splitter, are focused after passing through a plano-convex lens, are irradiated to a first plano-concave full reflection mirror, and then are transmitted to a nonlinear crystal to generate signal light and idler mid-infrared laser through nonlinear frequency conversion; the idler mid-infrared laser and the residual pump light are transmitted to a doublet mirror and are separated by the doublet mirror; the signal light is reflected to the nonlinear crystal in sequence through a second plano-concave full reflection mirror, a first plane full reflection mirror, a second plane full reflection mirror and the first plano-concave full reflection mirror, and an oscillation closed loop is formed. The application realizes that the pulse OPO outputs a pulse with a line width less than 90 MHz in the tuning range, and the extraction efficiency of the idler light is as high as 9.3%.

The application relates to a high-power mid-infrared optical parametric oscillation amplification device directly pumped by a Tm laser, and belongs to the technical field of high-power mid-infrared lasers. The device comprises a Tm:YLF seed laser, a Tm:YLF slab amplifier, a ZGP optical parametric oscillator and a ZGP optical parametric amplifier in sequence. The Tm:YLF seed laser outputs 1.908-micron fundamental light, the power of the 1.908-micron fundamental light is amplified through the Tm:YLF slab amplifier, and then the ZGP optical parametric oscillator and the ZGP optical parametric amplifier are directly pumped. The injection end and the output end of the Tm:YLF slab amplifier are both provided with a fundamental light coupling isolation system. A mid-infrared laser coupling isolation system is arranged between the ZGP optical parametric oscillator and the ZGP optical parametric amplifier. The ZGP optical parametric oscillator and the ZGP optical parametric amplifier are directly pumped by high-power Tm:YLF lasers, so that the power of the mid-infrared laser and the overall efficiency of the system are improved.

The invention relates to the field of chemical oxygen-iodine lasers, in particular to a mid-infrared wavelength conversion method and device of a chemical oxygen-iodine laser. Firstly, a pair of pulsed magnetic field generators is placed on the upper side and the lower side of a gain area of an original continuous wave chemical oxygen-iodine laser; the hydrogen Raman pool is used as a magnetic gain switch to enable the laser to output laser pulses with higher peak power, then 1315nm wavelength laser output by the oxygen-iodine chemical laser is guided into the hydrogen Raman pool, the original 1315nm wavelength laser is converted into 2900nm wavelength laser through Raman scattering to be output, finally, the 2900nm wavelength laser is guided into the vacuum bin containing the iron-doped zinc selenide crystal, and the iron-doped zinc selenide crystal is obtained. And by pumping the iron-doped zinc selenide crystal, the laser with the wavelength of 2900 nm is further converted into intermediate infrared laser pulses with the wavelength of 4000-5000 nm. On the premise that the original laser structure is not influenced, the oxygen-iodine chemical laser has the possibility of being applied to the middle infrared band.

This application provides a cavity-enhanced mid-infrared photothermal vibration measurement system and method, relating to the field of photothermal vibration spectrum detection of materials, aiming to improve the accuracy and sensitivity of detection. The measurement system includes a cavity-enhanced substrate, a mid-infrared laser, a laser vibrometer, and a lock-in amplifier. The cavity-enhanced substrate includes a substrate and an asymmetric Fabry-Perot resonator. The asymmetric Fabry-Perot resonator includes a reflective layer, an intermediate dielectric layer, and a layer to be tested, sequentially stacked on the substrate. The mid-infrared laser applies mid-infrared laser light to the layer to be tested, causing the layer to generate a photothermal vibration signal. The laser vibrometer detects the photothermal vibration signal and converts it into a detection electrical signal. The lock-in amplifier extracts the detection electrical signal to determine the photothermal vibration spectrum of the layer to be tested. The ratio of the thickness of the intermediate dielectric layer to the thickness of the layer to be tested ranges from 0.8 to 10. The refractive index of the material of the layer to be tested is less than the refractive index of the material of the intermediate dielectric layer, but greater than the refractive index of air.

The invention discloses an automatic calibration gas detection system and calibration method based on cooperation of mid-infrared light and visible light, and relates to the technical fields of optical detection, environmental monitoring, automatic control and the like, mid-infrared laser and visible laser are combined and emitted into a multiple reflection pool, and initial alignment is carried out based on visible laser of indicating light in an initial state; a high-reflectivity mirror bracket of the multiple reflection pool is provided with a stepping motor used for adjusting the angle of a high-reflectivity mirror, in the operation process, the signal intensity and the signal-to-noise ratio are monitored in real time, the stepping motor is driven to adjust the angle of the high-reflectivity mirror according to the monitoring result, and closed-loop automatic calibration is achieved. According to the invention, the invisible mid-infrared light path is visualized by using coaxial indicating light, so that the calibration time of initial installation and daily maintenance is shortened, the angle of the high-reflectivity mirror is automatically adjusted, the offset of the light path is compensated and the optimal detection state is kept during the operation of the system, and the long-term stability and reliability of the system are improved.

The application provides a 2.8 mu m single-frequency fiber laser based on a pump-enhanced saturable absorber and belongs to the technical field of mid-infrared laser. The linear resonant cavity of the laser is composed of a low-refractivity fiber grating and a high-refractivity fiber grating, and a first pump coupler, an erbium-doped fluoride gain fiber, a pump light stripper and a pump-enhanced saturable absorber filter device are sequentially arranged in the cavity. The filter device contains enhanced pump light injected by a second pump source through a second pump coupler and used for exciting the absorption characteristics of the erbium-doped saturable absorption fiber; the laser of the first pump source is used for pumping the gain fiber to generate laser oscillation, and the enhanced pump light is used for forming a MHz-level ultra-narrow band dynamic grating in the saturable absorption fiber. The dynamic grating and the static filter of the fiber grating work cooperatively to realize stable single-longitudinal-mode selection, and finally the single-frequency laser is output from the first fiber end cap. The application realizes compact structure and high stability of 2.8 mu m single-frequency laser output.

A narrow linewidth mid infrared laser, including a pumping laser diode with a fast-axis compressor and a pumping wavelength λo; and an optical resonator arranged to receive the pumping wavelength λo, the optical resonator including a laser crystal with a lasing wavelength λp, a dichroic mirror, and a nonlinear crystal to generate an idler wavelength λi.

An atomic force microscope-based nanoscale photothermal ion in-situ characterization device, comprising: an atomic force microscope module comprising an AFM conductive probe in contact with a to-be-measured region of a to-be-measured sample; a nanometer infrared photothermal excitation module for emitting pulsed mid-infrared laser to the to-be-measured region to cause the micro-cantilever of the AFM conductive probe to deform; a photothermal ion signal detection module comprising a signal detection unit and a data processing and display unit in communication, the signal detection unit being used to acquire the micro-cantilever signal of the AFM conductive probe; wherein the data processing and display unit acquires the photothermal ion second-harmonic signal of the to-be-measured region based on the micro-cantilever signal of the AFM conductive probe to display the image of the ion transport micro-region surface distribution of the to-be-measured region.

This invention discloses a laser irradiation therapy device based on metal film directional scattering beam expansion, comprising a chassis, a power supply module, an intelligent control module, a mid-infrared laser emission module, and a human-computer interaction component mounted on the chassis. It also includes a laser transmission module, a metal film directional scattering beam expansion and homogenization module, a visible laser emission module, a temperature detection module, and an adjustable support. During operation, the mid-infrared laser is transmitted to the beam-combining module via a light guide arm or flexible mid-infrared hollow fiber, while the visible laser is transmitted to the beam-combining lens via a visible light incident channel. The two lasers form a coaxial composite beam at the beam-combining lens, which together irradiates the metal film component. After directional scattering and beam expansion, the beam is output from the light outlet to the working area, forming an expanded and homogenized light spot. This therapy device, with the metal film component as the core optical shaping component, has advantages such as clear structure, adjustable light output direction, adjustable light spot area, visualized working area, and high safety.

The invention discloses a hollow anti-resonance optical fiber with a large mode field area and ultralow loss in a middle infrared band. The cross section structure is composed of a central pentagonal hollow core area, a peripheral glass sheet connected coaxial semicircular nested pipe cladding and an outer cladding sleeve. The hollow core is an air channel with a pentagonal outline and is used for realizing the propagation of light in a low-loss medium; the cladding is composed of five symmetrically-distributed coaxial semicircular nested tube units, each unit comprises an inner semicircular arc glass sleeve and an outer semicircular arc glass sleeve which are connected by glass sheets to form a connected structure, and an anti-resonance boundary with a periodic microstructure is formed. According to the structure, the size of an air hole, the thickness of a glass wall, the radius ratio of two layers of semi-circular arcs and geometric symmetry are accurately regulated and controlled, and light of a specific wave band is limited in the hollow core through the anti-resonance effect. The invention realizes ultralow transmission loss, large mode field area and high nonlinear threshold, and is suitable for the application fields of mid-infrared laser transmission, gas sensing, spectral analysis and the like.

A laser apparatus for generating a sub- 190 nanometer laser beam includes a deep-ultraviolet solid-state laser source to generate an initial deep-ultraviolet laser beam, at least one mid-infrared solid-state laser source to generate at least one respective mid-infrared laser beam, and at least one lithium triborate crystal to generate an output deep-ultraviolet laser beam from the initial deep-ultraviolet and mid-infrared laser beams via sum-frequency generation. Each mid-infrared solid- state laser source includes (a) a holmium-, thulium-, or chromium-doped gain crystal or gain fiber or (b) an optically-pumped semiconductor gain material to generate the respective mid-infrared laser beam. The laser apparatus may be configured for continuous-wave and pulsed operation, thus offering versatile solutions for applications requiring DUV laser radiation below 190 nanometers. Advantageously, the present approach relies on lithium triborate. Lithium triborate crystals can be grown with the quality and dimensions needed for industrial applications.

The invention discloses a tunable mid-infrared fiber laser with high power flatness. A pumping source enters an erbium-doped fiber through a pumping / signal coupler, and a low-reflectivity cavity mirror, the erbium-doped fiber, a laser collimator and a tuned filter form a laser resonant cavity; the low-reflectivity cavity mirror and the pumping / signal coupler are coupled to output intermediate infrared laser, the tuning filter device is used for realizing a wavelength tuning function, and the insertion loss difference value of the device under different working wavelengths is less than 0.5 dB; the wavelength of the pumping source is in a 1.6-1.7 micron wave band, erbium ions are pumped from a ground state energy level to a laser upper energy level, and laser lower energy level particles are consumed; the stable insertion loss in the process of adjusting the working wavelength by using a tuning filter device is combined with the characteristics that the emission cross section and the absorption cross section of erbium ions are gradually reduced along with the increase of the wavelength and the reduction rate of the absorption cross section is greater than that of the emission cross section, so that the gain difference caused by the emission cross section difference under different laser wavelengths of the fiber laser is reduced; and the power flatness of the fiber laser under different tuning wavelengths is improved.

A method of closing an opening in a tissue comprises providing a light absorbing material, introducing the light absorbing material into a tissue opening, and irradiating the light absorbing material with at least one light source so as to increase a temperature of the light absorbing material, causing the tissue edges of the tissue opening adhere to the light absorbing material and / or to each other. A kit comprising a light absorbing material and a light emitting device is also described.

The application relates to a medical mid-infrared hollow-core optical fiber transmission device, which comprises an optical fiber body, an end cap and a connecting structure, the optical fiber body has an output end, the end cap has a connecting surface for being connected with the output end of the optical fiber body, the end cap is made of a biocompatible inorganic non-metallic material, the infrared absorption cutoff wavelength of the end cap is greater than 6 mu m, and the transmittance in the 2-6 mu m wave band is greater than or equal to 50%, the connecting structure comprises a glass sealing element, the glass sealing element is arranged at the connecting surface of the output end of the optical fiber body and the end cap, the glass sealing element and the outer peripheral surface of the output end of the optical fiber body form a ring-shaped contact interface, and the glass sealing element is fused between the output end of the optical fiber body and the connecting surface of the end cap, so that the optical fiber body and the end cap are in sealed connection. The application meets the diversified requirements of different operation scenes on the mid-infrared laser wave band, the material itself is non-toxic and stable, and the safety of the interventional laser operation is ensured.

The invention relates to the technical field of optoelectronic devices, and discloses a compact electric pumping coherent broadband intermediate infrared chalcogenide glass-silicon-based hybrid integrated light source system. The system comprises a pumping femtosecond laser module on a silicon substrate and an optical fiber spread spectrum compression module. The on-chip module generates femtosecond pulses under the pumping of an electric pump; the optical fiber module sequentially comprises a chalcogenide photonic crystal fiber and an anomalous dispersion compensator. The output end of the on-chip module is optically coupled with the input end of the chalcogenide fiber, and the output end of the chalcogenide fiber is connected to the anomalous dispersion compensator. The spectrum of the femtosecond pulse is broadened through the nonlinear effect in the chalcogenide fiber, then the pulse is compressed by the anomalous dispersion compensator, and finally broadband intermediate infrared coherent light is output. According to the system, low-power-consumption, wide-spectrum and high-coherence mid-infrared laser output is realized by a compact electric pumping framework through hybrid integration and dispersion nonlinear collaborative management.

A mid-infrared laser generation system based on dispersion-managed soliton bunch pulses. The system can achieve high-power, high-efficiency and high-proportion mid-infrared laser output, and has the advantages of an all-fiber configuration, a compact structure and a high power proportion in a longer-wavelength region of a mid-infrared spectrum. A pulsed fiber laser device generates a nanosecond pulse laser in a 1.5-micron band. A fiber pulse stretcher is made of a single-mode silica fiber, splits nanosecond pulses into a plurality of ultrafast soliton pulses by means of a nonlinear effect, and performs spectral energy conversion from 1.5 microns to 2.4 microns. A fiber laser amplifier further increases the output power of a stretched pulse laser and extends a spectrum to a 2.7-micron band, and also increases pulse energy beyond a 2.3-micron band. A fiber mode field adapter efficiently couples into a nonlinear fiber pulses generated in the fiber laser amplifier. The nonlinear fiber extends a laser to a mid-infrared 3-5-micron band, thereby achieving high-power, high-efficiency and high-proportion mid-infrared laser output.

Disclosed herein is a spectroscopy device incorporating a mid-infrared laser. In one particular embodiment a spectroscopy device is provided including: a substrate; a single mode laser positioned on the substrate; a single mode detector positioned opposite to the single mode laser on the substrate. A gap is formed between the single mode laser and the single mode detector and a substance is positioned in the gap. The single mode laser is configured to output a tunable narrow wavelength of radiation towards the detector and when the single mode laser outputs a wavelength of radiation overlapping one of the substance's rotational-vibrational energy levels, the substance at least partially absorbs the radiation. The single mode detector is configured to measure the amount of narrow wavelength radiation that is not absorbed by the substance between the single mode detector and the single mode laser.

The invention provides an optical cavity enhanced mid-infrared light thermal vibration measurement system and method, relates to the field of material photo-thermal vibration spectrum detection, and aims to improve the accuracy and sensitivity of detection. The measurement system comprises an optical cavity enhanced substrate, an intermediate infrared laser, a laser vibration meter and a lock-in amplifier. The optical cavity enhancement base comprises a substrate and an asymmetric Fabry-Perot resonant cavity, and the asymmetric Fabry-Perot resonant cavity comprises a reflecting layer, an intermediate dielectric layer and a to-be-detected object layer which are sequentially stacked on the substrate. The mid-infrared laser acts mid-infrared laser on the to-be-detected object layer, so that the to-be-detected object layer generates a photo-thermal vibration signal. The laser vibration meter detects a photo-thermal vibration signal and converts the photo-thermal vibration signal into a detection electric signal. And the lock-in amplifier extracts the detection electric signal to determine the photo-thermal vibration spectrum of the to-be-detected object layer. And the ratio of the thickness of the intermediate dielectric layer to the thickness of the to-be-detected object layer is 0.8-10. The refractive index of the material of the to-be-detected object layer is smaller than the refractive index of the material of the intermediate dielectric layer and larger than the refractive index of air.

The application provides a mid-infrared laser linewidth measurement device and method based on a hollow-core anti-resonant fiber, and belongs to the technical field of precise laser parameter measurement. The device comprises a mid-infrared single-frequency laser, a first collimating lens, a beam splitter, an acousto-optic modulator, an aperture, a first mirror, a converging lens, a hollow-core anti-resonant fiber, a second collimating lens, a second mirror, a beam combiner, a photodetector and a spectrum analyzer. The method is as follows: after the laser is split, one path is frequency-shifted, and the other path is introduced into a time delay through the fiber; beat frequency signals are generated by interference of the two paths of light; and the linewidth is obtained through photoelectric conversion and spectrum analysis. The application takes a low-loss hollow-core anti-resonant fiber as a core delay element, solves the problem of difficulty in realizing long optical path delay in the mid-infrared waveband, has the advantages of compact structure, convenient adjustment, wide applicable waveband and high measurement precision, and is suitable for precise linewidth measurement of a 2-5 mu m single-frequency laser.

The invention provides a 2-micron intelligent ultrafast laser spectrum real-time light detection device and method. The 2-micron intelligent ultrafast laser spectrum real-time light detection device comprises a signal source module, a relay amplification module, a detection analysis module and an intelligent algorithm regulation and control module. The signal source module outputs intermediate infrared laser pulses; the relay amplification module realizes signal gain and dispersion broadening; the genetic algorithm sub-module dynamically optimizes transmission parameters such as pumping power and optical fiber length; the convolutional neural network algorithm sub-module carries out real-time feature recognition on the time-frequency signal output by the photoelectric detector and maps a time-domain waveform. And the detection and analysis module is used for intelligently monitoring the time-frequency composite signal. The problem of large intermediate infrared laser long-distance transmission loss is solved through the genetic algorithm, real-time analysis of a soliton pulse fine structure is realized by replacing a traditional spectrometer with the convolutional neural network, and time-frequency synchronous measurement of ultrafast laser in the 2-micron waveband can be completed without a complex test instrument. The system has the characteristics of adaptive parameter adjustment, high measurement precision and strong system expansibility.

The invention discloses an ultraviolet laser generating device which comprises an intermediate infrared laser generating system, a near ultraviolet laser generating system and a sum frequency crystal. The mid-infrared laser generating system comprises a first pumping source, a first focusing coupling system and a first laser resonant cavity; the near ultraviolet laser generation system comprises a second pumping source, a second focusing coupling system and a second laser resonant cavity; the mid-infrared and near-ultraviolet dual-wavelength laser is adopted to perform sum frequency in the sum frequency crystal, so that the deep ultraviolet laser can be efficiently obtained.

To provide a method for manufacturing a fuel cell separator that exhibits minimal warping after laser irradiation, low contact resistance during lamination, excellent conductivity, and good hydrophilicity, even when a thin-walled fuel cell separator is irradiated with a laser. [Solution] A method for manufacturing a fuel cell separator, comprising irradiating the surface of a molded body, which is formed by molding a composition containing graphite powder and epoxy resin components including a main agent, a curing agent and a curing accelerator, with an infrared laser to remove the resin from the surface of the molded body and further performing a hydrophilic treatment, wherein the beam quality (M) of the infrared laser 2 The pulse energy is 2.8 or less, the spot diameter is 150-300 μm, and the pulse energy per unit area is 8-50 mJ / mm². 2 A method for manufacturing a fuel cell separator, characterized by the following:

The application discloses a kind of copper electrode laser curing system and method of TOPCon solar cell, the system includes mid-infrared laser generation module, beam shaping and energy management module, precision motion and positioning platform and synchronous control and monitoring module.The method used is: after coating copper paste on the back silver seed layer of TOPCon battery, laser beam is irradiated, by accurately controlling laser energy density and pulse width, energy is selectively resonant absorbed by copper paste organic matter, millisecond level rapid curing is realized, while ensuring that energy density is lower than the damage threshold of lower layer aluminum oxide / silicon nitride passivation film, so that the base temperature rise is lower than 200 DEG C.The application overcomes the defects of traditional thermal curing, such as low efficiency, high energy consumption and easy damage to passivation layer, and provides an efficient, reliable and non-damage battery performance industrialization solution for TOPCon battery low-cost "de-silverization".

The utility model discloses a precision adjusting structure of an intermediate infrared laser, which relates to the technical field of lasers and comprises a laser main body used for generating intermediate infrared laser; the cavity mirror assembly comprises a total reflection mirror arranged at one end of the laser device main body and an output reflection mirror arranged at the other end of the laser device main body, and a resonant cavity is formed between the total reflection mirror and the output reflection mirror so that the mid-infrared laser can be stably output; the adjusting assembly comprises a first adjusting part and a second adjusting part, the first adjusting part is connected with the output reflecting mirror to drive the output reflecting mirror to rotate, and the second adjusting part is connected with the total reflection mirror to drive the total reflection mirror to rotate; and the linkage assembly is arranged between the first adjusting part and the second adjusting part, so that the first adjusting part and the second adjusting part rotate synchronously. According to the technical scheme provided by the utility model, the problem that the existing intermediate infrared laser cannot meet the use requirements of different scenes is solved.

The invention discloses an intermediate infrared laser and wormwood active substance combined physical therapy device and method, and relates to the technical field of medical physical therapy equipment, the intermediate infrared laser and wormwood active substance combined physical therapy device comprises an intermediate infrared laser module, a physical therapy probe, a temperature detection module, a control host and a wormwood extract dressing, the infrared radiation peak value of traditional moxibustion is accurately matched, a lens is arranged in a physiotherapy probe and used for focusing and conducting light beams, a temperature detection module monitors the temperature of a treatment area in real time, a control host adjusts laser power in a closed-loop mode through a PID algorithm according to a temperature feedback signal, and accurate temperature control is achieved. Under laser irradiation, active ingredients are promoted to be released and absorbed percutaneously; according to the invention, the laser simulated moxibustion is combined with the dressing, and the closed-loop temperature control is utilized to ensure the treatment safety, so that the modernized moxibustion therapy with no smoke, no open fire and controllable dosage is realized.

A method and a system for measuring carrier-to-envelope phase fluctuations (CEP) fluctuations of a laser field, the method comprising focusing laser pulses in a solid-state material for high harmonic generation, collecting a resulting high harmonic spectrum, and inferring a relative phase of the driving field from the high harmonic spectrum. The system comprises a source of CEP stable mid-infrared laser pulses; a CEP variation unit; a solid state medium; a detector; and first focusing optics focusing pulses generated by the source into the solid state medium and second focusing optics collecting resulting harmonics generated in the solid state medium into the detector.

This fuel cell separator manufacturing method comprises: irradiating, with infrared lasers, the surface of a molded body formed by molding a composition containing a graphite powder and an epoxy resin component containing a main agent, a curing agent, and a curing accelerator to remove the resin on the surface of the molded body; and further performing hydrophilic treatment. The infrared lasers have: a beam quality (M2) of 2.8 or less; a spot diameter of 150-300 μm; and a pulse energy per unit area of 8-50 mJ / mm2. The fuel cell separator manufacturing method is for manufacturing a fuel cell separator having: small warpage after irradiation even when the thin fuel cell separator is irradiated with lasers; low contact resistance and excellent electrical conductivity when laminated; and good hydrophilicity.