191 results about "Laser amplifiers" patented technology

A high-power single-frequency laser amplifier based on prepared YAG derivative optical fibers comprises a single-frequency optical fiber laser seed source, the output end of the single-frequency optical fiber laser seed source is connected with the input end of a first-stage pre-amplifier, and the output end of the first-stage pre-amplifier is connected with the input end of a second-stage pre-amplifier. The output end of the secondary preamplifier is connected with the input end of the high-power double-cladding circulator, and the output end of the high-power double-cladding circulator is connected with a signal light input port of the high-power pumping signal beam combiner. The output end of the high-power pumping signal beam combiner is connected with one end of a specially prepared large-mode-field low-NA double-cladding rare earth doped YAG derivative optical fiber, and the other end of the large-mode-field low-NA double-cladding rare earth doped YAG derivative optical fiber is connected with the input end of the cladding light filter. The problem that expansion and diffusion of a fiber core in the YAG derived optical fiber are not controlled is solved, and therefore the theoretical power limit of single-frequency optical fiber laser amplification conducted through a silica optical fiber at present is broken through.

The invention provides an optical system and a monitoring method for monitoring a stimulated Brillouin scattering effect, and the optical system for monitoring the stimulated Brillouin scattering effect comprises the steps: firstly, conveying a narrow-linewidth seed source into a laser amplifier through a first optical device, and carrying out the narrow-linewidth laser amplification; and the stimulated Brillouin scattering light generated by the laser amplifier is guided out to the return light monitoring module, so that the return light power and the spectral component of the stimulated Brillouin scattering light are detected in real time through the return light monitoring module, and the purposes of simultaneously and accurately measuring the power of the stimulated Brillouin scattering light and observing the laser component are achieved. Whether the stimulated Brillouin scattering effect occurs or not can be judged more easily; furthermore, according to the optical system, the narrow-linewidth seed source and a spectrograph in the return light monitoring module can be protected from being damaged by return light to the maximum extent by adjusting the light splitting proportion of the first optical device and the return light monitoring module, and the purposes of accurately judging the stimulated Brillouin scattering effect and protecting system safety are achieved.

The invention relates to the technical field of laser amplification, and discloses a high-efficiency dye laser amplification technology, which comprises the following steps of using high repetition frequency ultrafast laser as a pumping source, and carrying out beam expansion and collimation on pumping light through a telescope system; the dye concentration is adjusted in real time through the microfluidic system, and the dye concentration is monitored in real time through the fluorescence detection system; a photonic crystal frequency doubling crystal is used for frequency doubling conversion; pumping light intensity, dye concentration and output power data are collected and subjected to standardization processing; performing data analysis and system parameter optimization through a deep learning model; and the temperature distribution of the laser amplifier is monitored and adjusted in real time by using an intelligent thermal management system. By integrating the high-repetition-frequency ultrafast laser pumping source and the telescope system, uniform beam expansion and collimation of light beams are realized, and the laser amplification efficiency and stability are remarkably improved. Compared with the prior art, the influence of uneven light spots on the amplification effect is effectively reduced, and the quality and consistency of output light beams are ensured.

A mid-infrared laser generating system based on dispersion regulation and control soliton group pulses can obtain high-power, high-efficiency and high-proportion mid-infrared laser output, and has the advantages of being all-fiber, compact in structure and high in mid-infrared rear spectrum power proportion. The pulse fiber laser generates nanosecond pulse laser in a 1.5-micron wave band; the optical fiber pulse stretcher is a single-mode quartz optical fiber, the nanosecond pulse is split into a plurality of ultrafast soliton pulses through a nonlinear effect, and spectral energy conversion from 1.5 microns to 2.4 microns is carried out; the fiber laser amplifier further improves the output power of the broadened pulse laser, expands the spectrum to a 2.7-micron wave band, and improves the pulse energy after the 2.3-micron wave band; the optical fiber mode field adapter efficiently couples the pulse generated in the optical fiber laser amplifier into the nonlinear optical fiber; the nonlinear optical fiber expands the laser to a mid-infrared 3-5 micron wave band, and mid-infrared laser output with high power, high efficiency and high proportion is obtained.

The invention discloses a laser amplifier based on wavefront distortion correction, which relates to the technical field of lasers and comprises a laser source, a gain medium, a wavefront sensor, a self-adaptive optical wavefront correction module and a feedback control system. The laser beam amplified by the gain medium is output through the second optical coupler, the wavefront sensor is connected with the output end of the gain medium, and the feedback control system is connected with the wavefront sensor and the adaptive optical wavefront correction module through a data bus and automatically generates a correction signal according to wavefront distortion data. The feedback control system is installed, the function of adjusting and correcting parameters in real time based on wavefront distortion is achieved, the problem that wavefront distortion caused by optical system errors or environment disturbance is difficult to monitor and correct in real time through a traditional laser amplifier is solved, the focusing performance and transmission efficiency of laser beams are improved, and the laser amplifier has a wide application prospect. And stable and high-quality light beam output is maintained.

The invention discloses a terahertz technology detection and identification system and method, and relates to the technical field of terahertz technology material detection.The system comprises a femtosecond laser amplifier, a strong field terahertz radiation generation assembly, an electro-optical sampling assembly and a computer, and the femtosecond laser amplifier is used for emitting femtosecond laser pulses; the strong-field terahertz radiation generation assembly is used for generating a strong-field terahertz radiation beam and combining the strong-field terahertz radiation beam with the detection laser after the strong-field terahertz radiation beam penetrates through the to-be-detected sample; the electro-optical sampling assembly is used for electro-optical sampling; and the computer judges whether the to-be-detected sample is a natural material or an artificial material. According to the invention, the self-developed strong-field terahertz time-domain spectroscopy technology is used for detection, and compared with a traditional radioactive ray detection method and weak-field terahertz radiation, the strong-field terahertz radiation has the advantages of high power, high penetrability, high signal-to-noise ratio and the like in addition to low photon energy and no damage characteristics; the subtle differences of different materials of the same material can be identified more accurately, and the accuracy of detecting and identifying the types of the materials is effectively improved.

The invention discloses a nonlinear cascade laser amplifier based on a single crystal optical fiber, which relates to the technical field of laser and comprises a seed source, a pre-chirp management module, a single crystal optical fiber cascade module and a pulse compression module which are arranged along an optical path, a pumping source is further arranged between the pre-chirp management module and the single crystal optical fiber cascade module, and the pumping source emits pumping light to a light path between the pre-chirp management module and the single crystal optical fiber cascade module; the single-crystal optical fiber cascade module comprises a plurality of cylindrical single-crystal optical fibers which are connected in series. The nonlinear phase shift and the self-focusing length in the amplification process are regulated and controlled through mixed cascade of different types of single crystal optical fibers, so that few-period pulse amplification generation with high average / peak power is realized.

A laser device according to one embodiment includes a laser light source configured to output pulsed laser light L1 and a pulse width control unit configured to amplify the pulsed laser light output from the laser light source, change a pulse width of the pulsed laser light, and output the pulsed laser light. The pulse width control unit includes a first laser amplifier configured to amplify the pulsed laser light and a pulse waveform manipulation unit disposed between the first laser amplifier and the laser light source and configured to manipulate a pulse waveform of the pulsed laser light.

The invention relates to the field of semiconductor device and integrated circuit research, in particular to a semiconductor device dose rate effect laser simulation system. Multiple wavelengths and a wide energy range are achieved through the optical fiber laser pulse seed source assembly and the solid laser amplifier assembly, the pulse width can range from 1 ns to 100 microseconds, variable complex waveforms such as square waves, rectangular waves, sine waves and pulse strings are achieved, and pulse laser with the energy range from the nanojoule level to the joule level and adjustable wavelengths and waveforms can be output according to requirements. The high-low energy laser adopts a common-path design, so that the system integration degree is improved; light spots are adjustable from centimeter level to micron level, and global irradiation and micro-area positioning and scanning of an irradiation sample can be realized. According to the invention, dose rate effects under different conditions can be accurately and flexibly simulated, the blank of a high-energy, variable-waveform and multi-wavelength dose rate effect laser simulation system is filled up, and an efficient solution is provided for the reliability research of devices under a complex irradiation environment.

The application provides an optical system and a monitoring method for monitoring stimulated Brillouin scattering effect. The optical system for monitoring stimulated Brillouin scattering effect firstly delivers a narrow linewidth seed source into a laser amplifier through a first optical device to amplify the narrow linewidth laser, and guides stimulated Brillouin scattering light generated by the laser amplifier to a back light monitoring module to detect the back light power and spectral components of the stimulated Brillouin scattering light in real time through the back light monitoring module, so as to realize the purpose of simultaneously and accurately measuring the stimulated Brillouin scattering light power and observing the laser components, and is more conducive to judging whether the stimulated Brillouin scattering effect occurs. Further, the optical system can adjust the light splitting ratio of the first optical device and the back light monitoring module to protect the narrow linewidth seed source and the spectrometer in the back light monitoring module from the damage of the back light to the greatest extent, and achieve the purpose of accurately judging the stimulated Brillouin scattering effect and protecting the system safety.

The invention relates to a method for amplifying a forward-running laser pulse (16) and less amplifying a backward-running laser pulse (20), wherein the laser pulses (16, 20) pass through a pumped laser amplifier (14), comprising the method steps: A) switching on or increasing a pump power provided by a pump source for the laser amplifier (14) before passing through the forward-moving laser pulse (16) and switching off or decreasing the pump power provided by the pump source for the laser amplifier (14) before passing through the backward-moving laser pulse (20); and / or B) Operating the laser amplifier (14) with such a high small-signal amplification and / or such a low saturation power that the forward-running laser pulse (16) reduces the population inversion of the laser amplifier (14) for the backward-running laser pulse (20) to the greatest possible extent.

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

A laser device includes an oscillator outputting pulse laser light; an amplifier amplifying the pulse laser light; an optical pulse stretcher extending a pulse width of the pulse laser light; a beam divergence angle adjuster including an upstream lens arranged on an optical path of the pulse laser light, a downstream lens arranged downstream of the upstream lens, and an optical path length changing mechanism for changing an inter-lens optical path length between the upstream lens and the downstream lens; and a processor controlling the beam divergence angle adjuster and obtaining a repetition frequency or a duty of the pulse laser light, and to change, when the repetition frequency or the duty changes by a preset threshold or more, the inter-lens optical path length so that the beam divergence angle of the extended pulse laser light becomes small in accordance with the repetition frequency or the duty after the change.

The application discloses a concentration gradient design method of a laser amplifier gain medium and the laser amplifier gain medium, and relates to the technical field of laser amplification, and aims to solve the heat effect problem that heat distribution is uneven due to uneven pump light absorption distribution of the laser amplifier gain medium. Technical points of the application include: according to the heat conduction equation, the phase difference of each section of the crystal corresponding to the seed light passing through the pump light region when the laser amplifier amplifies the seed light is calculated and obtained; according to the phase difference of each section of the crystal through which the seed light passes being equal, the phase difference of each section of the crystal corresponding to the seed light passing through the pump light region is set to be equal; the absorption coefficient of each section of the crystal is obtained by iterative solution using simulation software; and the concentration gradient of each section of the crystal is calculated and obtained according to the relationship between the absorption coefficient and the concentration gradient. According to the application, the concentration distribution of the laser amplifier crystal is designed according to the depolarization generated by the seed light passing through the amplification laser medium, so that the purpose of reducing the thermal depolarization effect from the root is achieved.

The present invention discloses a laser amplifier based on wavefront aberration correction, which relates to the technical field of lasers. It includes a laser source, a gain medium, a wavefront sensor, an adaptive optical wavefront correction module, and a feedback control system. The laser source is connected to the gain medium through a first optical coupler. The laser beam amplified by the gain medium is output through a second optical coupler. The wavefront sensor is connected to the output end of the gain medium. The feedback control system is connected to the wavefront sensor and the adaptive optical wavefront correction module through a data bus, and automatically generates a correction signal according to the wavefront aberration data. By installing the feedback control system, the present invention realizes the function of real-time adjusting correction parameters based on wavefront aberration, solves the problem that traditional laser amplifiers are difficult to monitor and correct wavefront aberration caused by optical system errors or environmental disturbances in real time, improves the focusing performance and transmission efficiency of the laser beam, and maintains stable and high-quality beam output.

The application discloses a multi-pass disk laser amplifier, which comprises a near end and a far end, a pump laser beam, a seed laser beam, a first parabolic mirror, a second parabolic mirror, a laser gain medium, a first deflection optical prism group and a second deflection optical prism group, wherein the laser gain medium comprises a medium reflection surface; the pump laser beam located at the near end is aligned to the first parabolic mirror located at the far end for incidence through a first beam collimator; and the seed laser beam located at the near end is aligned to the second parabolic mirror located at the far end for incidence after passing through a second beam collimator. Compared with a conventional multi-pass disk laser amplifier, the application has a simpler structure, a shorter amplification optical path, a more compact volume and higher system stability. Furthermore, by changing the structure of the design prism of the pump light path, 12-pass, 24-pass, 36-pass, 48-pass and other multi-pass amplifications can be realized.

The invention relates to a laser amplifier assembly, a laser system and a lithographic apparatus. The laser amplifier assembly includes: first and second optical mirrors configured to transmit one of signal light and pump light and reflect the other of the signal light and the pump light, a wavelength of the pump light being different from a wavelength of the signal light; the laser amplification cavity is arranged between the first optical lens and the second optical lens, the laser amplification cavity comprises a laser gain medium doped with at least one doping agent, and the signal light is transmitted to the laser amplification cavity through one of the first optical lens and the second optical lens and penetrates through the laser gain medium; the pump light is transmitted to the laser amplification cavity via at least one of the first optical mirror and the second optical mirror and passes through the laser gain medium to interact with the laser gain medium to amplify the signal light, and one of the first optical mirror and the second optical mirror is configured to output the amplified signal light.

The invention discloses a dual-channel laser amplification device and method, and belongs to the technical field of lasers, and the device comprises a first seed laser unit and a second seed laser unit which are used for outputting two seed lasers with different incident angles and different refractive indexes in a gain medium; the pumping module is used for generating pumping light to provide pumping conditions for power amplification of the two beams of seed laser; the thermal control module is used for providing working temperature control conditions for the whole device; the laser gain medium is used for receiving two beams of seed laser incident from different incident angles through the incident end face and emitting the seed laser at the same angle through the emergent end face after multiple times of total reflection with different paths in the gain medium; and the third laser beam output unit is used for combining the two beams of seed laser emitted at the same angle to obtain an output light beam after power amplification. Power amplification of two laser beams is realized based on the single laser gain module, the laser beam combining function is realized, and the integration level of the laser amplifier and the light beam combining system is effectively improved.

The invention discloses a Raman beam combination laser amplifier, relates to the technical field of laser, and aims to solve the problem of low conversion efficiency of an existing beam combination laser amplifier. A first bowl-shaped reflecting mirror and a second bowl-shaped reflecting mirror are coaxially arranged at the two ends of a columnar reflecting mirror assembly, the concave surfaces face the columnar reflecting mirror assembly, and a Raman laser crystal is arranged in the columnar reflecting mirror assembly; seed light output by the seed light module enters the Raman laser crystal through the center of the first bowl-shaped reflector; and a plurality of beams of fundamental frequency light output by the plurality of fundamental frequency light modules are obliquely incident to the Raman laser crystal from the side surface of the columnar reflector assembly. Each beam of fundamental frequency light of the Raman beam combination laser amplifier can be reflected for multiple times in the amplifier and interacts with the seed light for multiple times, the conversion efficiency of the single beam of fundamental frequency light is improved, the adjustment difficulty of the fundamental frequency light module is low, and the Raman beam combination laser amplifier is suitable for integrated use.

The invention discloses a high-wind-speed coherent laser wind-finding radar device, which comprises a seed laser, a plurality of cascaded acousto-optic frequency shift modules, a laser amplifier, a first optical switch, a laser transmitting and receiving detection module, a wind field inversion module and a wind speed identification and control unit, and is characterized in that the plurality of cascaded acousto-optic frequency shift modules realize frequency shift and beam splitting of the seed laser; the first optical switch selects the seed laser output by one acousto-optic frequency shift module as heterodyne detection seed laser; the wind field inversion module performs wind field inversion on the heterodyne beat frequency signal output by the balance detector to obtain a wind speed measurement result; the wind speed identification and control unit controls the frequency shift amount of the emitting seed laser and the frequency shift amount of the heterodyne detection seed laser, so that the difference value between the Doppler frequency shift amount caused by the wind speed and the frequency shift amount of the heterodyne detection seed laser is within the bandwidth range of the balance detector, and effective detection of the wind speed is achieved. According to the invention, the wind speed measurement range of the coherent wind lidar can be effectively improved, and the reduction of the wind speed measurement precision is not caused.

The present invention discloses a dual-channel laser amplification device and method, belonging to the field of laser technology. The device comprises: a first seed laser unit and a second seed laser unit for outputting two seed laser beams with different incident angles and refractive indices in a gain medium; a pump module for generating pump light to provide pumping conditions for power amplification of the two seed laser beams; a thermal control module for providing operating temperature control conditions for the entire device; a laser gain medium for receiving two seed laser beams incident at different incident angles through an incident end face, and after undergoing several total reflections with different paths within the gain medium, emitting the two seed laser beams at the same angle through an exit end face; and a third laser beam output unit for combining the two seed laser beams emitted at the same angle to produce a power-amplified output beam. The present invention uses a single laser gain module to achieve power amplification of two laser beams and has a laser beam combining function, effectively improving the integration of the laser amplifier and beam combining system.

The invention relates to the technical field of laser equipment, in particular to a spectrum safety interlocking device and method for a laser system, and aims to prevent system damage caused by spectrum change by monitoring spectrum change. The monitoring installation position involved in the invention is after laser spectrum modulation and before light amplification, and at the same time, a circulator must be installed before light amplification, which is mainly to monitor the spectrum of return light in a laser amplifier. According to the monitoring device, the acquisition unit, the processing unit and the control unit are integrated on one circuit board, so that miniaturization is realized. The control circuit monitors laser spectrums after data processing and compares the laser spectrums with a set initial threshold value, if a certain spectrum of the laser device changes, the control circuit sends out TTL signals according to a set program, a control power supply is powered off, and therefore the safety of a laser system and related personnel is protected. Therefore, the problem that miniaturization and high-resolution compatibility of existing spectrum safety detection are difficult to realize is solved.

The invention discloses a 2-micron short-period laser amplifier based on a thulium-doped positive dispersion fluorotellurite optical fiber, which can solve the problem that a negative dispersion thulium-doped optical fiber is not suitable for performing gain management nonlinear amplification on a 2-micron pulse, and can obtain a pulse width lt. 50 fs, and single pulse energy gt; the femtosecond laser output device has the advantages of being full-fibrillated and compact in structure. The 2-micron femtosecond seed source is femtosecond pulse laser of a 2-micron wave band generated based on nonlinear amplification loop mirror mode locking; the chirped pulse amplifier is used for obtaining sub-picosecond 1.9 mu m femtosecond laser output with the average power greater than or equal to 1W; the optical fiber GMN amplifier is used for obtaining a few-period femtosecond pulse; the high-power optical fiber pulse compressor is a hollow-core optical fiber and is used for carrying out accurate dispersion compensation and high-quality pulse compression.

The application provides a kind of laser amplifier control system and method, the system includes the seed source, amplifier, phase modulator, nonlinear frequency conversion module and dichroic mirror arranged in sequence on optical path;The light output by nonlinear frequency conversion module is divided into two ways through dichroic mirror, one of which is used as system output light, and the direction of the other light path is provided with optical garbage bin;Adjust the phase modulator, so that the polarization direction of laser matches the nonlinear frequency conversion module, the system output light is the light after nonlinear frequency conversion, and the other way of fundamental light is recycled by optical garbage bin;Otherwise, the nonlinear frequency conversion module only outputs the fundamental light.By using the application, whether there is system output light, laser always passes through the crystal in nonlinear frequency conversion module, and the crystal will not exist the temperature drift caused by selective laser passing, to ensure the stability of system output light.

The present invention discloses a fiber laser amplifier based on hierarchical heat dissipation, which relates to the field of high-brightness fiber lasers. The fiber laser amplifier comprises: a fiber laser seed source, a pigtail semiconductor pump source, a first-stage fiber oscillator component, and a second-stage fiber laser amplifier component. The semiconductor pump light and the laser seed light are combined and injected into the first-stage fiber oscillator component, and the low-brightness semiconductor pump light is converted into a higher-brightness transition laser through a laser oscillation process with a lower quantum loss. The second-stage fiber laser amplifier component converts the transition laser into the laser seed light and outputs a high-brightness main laser. Based on the configuration of the pigtail semiconductor pump source, the present invention effectively distributes the heat generated by the quantum loss to two-stage components for heat dissipation, while also reducing the heat concentration on the single-stage component and improving the reliability of the amplifier.

The present invention discloses a device for measuring the temporal gain evolution and relaxation process of CO2 laser amplification, belonging to the field of laser technology. The device comprises: a continuous CO2 laser seed source, a short-pulse CO2 laser seed source, a first beam splitter located in the outgoing optical path of the short-pulse CO2 laser seed source; a pulsed CO2 laser information detection module located in the transmitted optical path of the first beam splitter; a first thin-film polarizer located at the intersection of the reflected optical path of the first beam splitter and the outgoing optical path of the continuous CO2 laser seed source; a CO2 laser amplifier, a second thin-film polarizer, a second beam splitter, a chopper wheel module, and a first mercury cadmium telluride detector located sequentially in the outgoing optical path of the first thin-film polarizer; and a time gating circuit for controlling the on / off timing of the continuous CO2 laser seed source, the short-pulse CO2 laser seed source, and the CO2 laser amplifier. This device simplifies traditional gain measurement devices while simultaneously studying various relaxation phenomena during the amplification process.

The application discloses a birefringence compensation device and method for improving extraction efficiency of a laser amplifier, wherein two end-pumped Yb:YAG crystal rods are connected in series through a 4f system and a quartz optical rotation crystal, signal laser is amplified twice after passing through the 4f system, and thermal-induced birefringence is precisely compensated; meanwhile, a beam expanding 4f imaging system is adopted to reduce the size of signal laser and pump laser in the first rod, so as to improve the extraction efficiency, and meanwhile, the signal spot in the second rod is ensured to be large enough to prevent damage of high-energy laser to optical elements. Compared with the traditional birefringence compensation method, the application designs parameters according to the disadvantages of Yb:YAG crystal quasi-three-level, so that the extraction efficiency is improved while the same compensation effect is achieved, and higher-energy laser pulses are outputted, which is beneficial to industrial processing.

The present invention relates to the field of laser equipment, and discloses a slat amplifier, comprising a base, a shading cover plate arranged on the base, and a lens and a light-transmitting panel arranged in the base. The lower end of the inner side of the base is downwardly connected through a plurality of air ports, and the air ports are arranged at an angle. The lens comprises a supporting shell, a lens, and a heat-conducting component, and the supporting shell is sleeved outside the lens. The inclined arrangement of the air ports and the difference in port sizes not only increase the air flow rate, but also improve the uniformity of the air flow. When the air compressor is started, the air ports can quickly introduce cold air into the interior of the base, exchange with the hot air inside, and discharge it through heat dissipation port 2. This design effectively reduces the temperature inside the base and avoids the performance degradation and damage of the laser amplifier caused by long-term high-temperature operation.

A laser amplification device includes a laser oscillator that includes a first laser active medium including a mixed gas containing carbon dioxide gas and emits pulsed laser light with the full width at half maximum of between 15 ns to 200 ns, and a laser amplifier that includes a second laser active medium including a mixed gas containing carbon dioxide gas through which the pulsed laser light emitted from the laser oscillator passes to be shortened to pulsed laser light with the full width at half maximum of between 5 ns and 30 ns to be output.

The utility model discloses a drying box and a laser amplifier, which comprise a gas circuit structure and a gas pump, and the gas pump is communicated with the gas circuit structure, so that gas can circulate in the gas circuit structure; the gas circuit structure comprises a drying device which is provided with a gas inlet end and a gas outlet end, and the drying device is used for drying gas; the detection device comprises a detection body and detectors, the detection body defines a first channel and a second channel, and the first channel and the second channel are arranged in a separated mode and contain the detectors respectively; wherein the first channel is communicated with the air inlet end, the detector in the first channel is used for detecting the humidity of the air before the air is input into the drying device, the second channel is communicated with the air outlet end, and the detector in the second channel is used for detecting the humidity of the air output from the drying device. According to the drying box, the humidity of gas before and after drying can be detected, so that the humidity of the gas is accurately monitored, and the air pump can be adjusted according to the humidity difference before and after drying, so that the required dryness of the gas is achieved.