41 results about "Ultra short pulse" patented technology

The application belongs to the technical field of semiconductor power devices, and particularly discloses a method for laser stripping gallium oxide. The method is characterized in that a super-short pulse laser with a predetermined wavelength is irradiated into the gallium oxide, and a two-photon absorption process occurs when the laser is focused at a position with a specific thickness from the surface. The high temperature generated in the process causes thermal decomposition of the gallium oxide, thereby achieving the purpose of stripping the gallium oxide. Compared with the traditional substrate cutting technology, the stripping method can significantly reduce the cutting consumption of the gallium oxide substrate, and the cut substrate can be reused after polishing, which helps to reduce the manufacturing cost of the gallium oxide device.

The embodiment of the application provides a kind of super-short pulse X-ray excited magnetic particle acoustic imaging method and system, the system includes: X-ray signal transmitting module, for responding to control instruction, control X-ray generator generates the X-ray pulse of preset parameter, so that the X-ray pulse acts on the magnetic particle mark region of pre-setting;Magnetic field modulation module is used to modulate the magnetic field of the magnetic particle mark region to make the X-ray pulse act on magnetic particle and produce original acoustic signal matched with magnetic field modulation;Acoustic detection module is used to convert the original acoustic signal into original data signal;Signal processing module is used to receive the original data signal, and the original data signal is processed to obtain imaging result.The super-short pulse X-ray excited magnetic particle acoustic imaging method and system of the application can meet long-term monitoring demand, effectively distinguish between viable cells and free magnetic particles, avoid misjudgment, and provide complete information for diagnosis and treatment.

The invention provides an ultra-short and ultra-strong laser pulse measuring device and an optical time-space coupling distortion measuring and data processing method based on the device. The device comprises an ultra-short and ultra-strong pulse laser system to be measured, an attenuation module, a beam splitter, a spectral phase measurement unit, a reflector, a micro-lens array, a binary intensity coding plate, a lens, a precision displacement platform, a dispersion element, an imaging lens and a CCD (Charge Coupled Device). The device and the method can be applied to quantitative measurement of ultrashort pulse light space-time coupling distortion.

The invention discloses polycrystalline diamond defect detection and repair equipment and an intelligent repair method. The method comprises the following steps: preprocessing a to-be-processed area of a to-be-detected product, performing excitation scanning, obtaining distribution data of an internal fluorescence signal, and generating a fluorescence signal distribution diagram; carrying out image analysis on the fluorescence signal distribution diagram, identifying and positioning an abnormal fluorescence signal region in the fluorescence signal distribution diagram, constructing a three-dimensional coordinate model according to the abnormal fluorescence signal region, and processing by adopting ultra-short pulse laser processing equipment to form a repair channel; providing a repair alloy, and filling the repair alloy into the repair channel through a directional infiltration technology to realize metallurgical bonding repair of the internal defect area; an optical traceable signal detection mechanism is introduced into a polycrystalline diamond material, and an ultrashort pulse laser micro-channel processing and directional infiltration repairing process is combined, so that positioning and in-situ repairing of internal defects are realized, and the overall mechanical property of the material is effectively recovered; therefore, the service life of the product is obviously prolonged, and the machining reliability is improved.

The invention discloses a disc Mmyshev mode-locked laser, and belongs to the technical field of ultrafast laser. The disc Mmyshev mode-locked laser comprises a laser gain module, a first nonlinear medium, a second nonlinear medium, a first interference filter, a second interference filter, a dispersion compensation module, an output coupling mirror, a first concave reflecting mirror, a second concave reflecting mirror, a high reflecting mirror, a third concave reflecting mirror and a fourth concave reflecting mirror. According to the disc Mmyshev mode-locked laser, a Mmyshev filtering mechanism is introduced into the disc Mmyshev mode-locked laser, and mode-locked self-starting and ultra-short pulse output under the condition of high average power are achieved. The disc Mmyshev mode-locked laser does not need an SESAM or Kerr mode-locked medium, can obtain stable ultrashort pulses smaller than 100 femtoseconds, has high stability, self-starting, good beam quality and structural expandability, and is suitable for application fields such as precise micromachining and extreme ultraviolet lithography driving sources.

A kind of ultra-short pulse synchronization testing device and method based on optical Kerr effect. After the high-power density ultra-short pulse of multiple beams to be synchronized passes through optical Kerr medium, induced birefringence effect occurs, which instantaneously changes the polarization characteristics of the reference light beam, and the synchronization between multiple beams of ultra-short pulses is measured by the amplitude or phase change of the reference signal pulse. This method can realize the synchronization measurement of ultra-short pulses with large angle at the target point, and has the advantages of high measurement accuracy, good repeatability and high stability.

The application belongs to the technical field of ultra-short pulse laser, and particularly relates to a nonlinear fiber loop and full positive dispersion pump protection type 8-shaped cavity and a laser. The nonlinear fiber loop comprises a first circulator provided with three ports, a second circulator provided with three ports and a beam combiner. The first port of the first circulator is used to connect the third port of a coupler, the second port of the first circulator is connected with the third port of the second circulator, and the third port of the first circulator is connected with the output end of the beam combiner. The first port of the second circulator is used to connect the fourth port of the coupler through a first gain fiber, the second port of the second circulator is connected with the signal end of the beam combiner, and the first input end of the beam combiner is connected with a first pump light source.

The application provides a saturable absorption device, a preparation method and a low-threshold starting pulse mode-locked laser, and relates to the technical field of lasers. The application discloses a method for preparing a high-quality bismuth copper selenium oxide single crystal by a chemical vapor transport method, and a saturable absorption device prepared by simply using the high-quality bismuth copper selenium oxide single crystal can be applied to a pulse mode-locked laser, and can generate super-short pulse laser output, has high stability and a high signal-to-noise ratio, and has a low starting threshold.

The invention discloses a neutron analysis physical testing system and method, and belongs to the technical field of nuclear physical testing. The system comprises a high-speed synchronous pulse generator used for generating pulse signals of various modulation sequences; the ultrashort pulse neutron generator is used for emitting short pulse neutron rays with specified parameters to the sample; the neutron detector is used for acquiring a secondary neutron signal; the gamma detector is used for acquiring a characteristic gamma signal generated by the neutron excitation detection sample; the safety control module is used for controlling the working state of the ultrashort pulse neutron generator; and the data processing device is used for collecting and gathering neutron signals and characteristic gamma signals in real time according to the time sequence of the pulse signals of the multiple modulation sequences. According to the system, time window drift and measurement errors are reduced, the ultra-short pulse neutron generator is started only under the condition that access control signals allow, and the accuracy, safety and stability of stratum physical parameter measurement are improved.

This application relates to the field of non-stick titanium cookware technology, and in particular to a surface treatment method for an uncoated non-stick titanium cookware based on a multi-level micro-nano composite structure. The method includes the following steps: Step 1: After heating the raw material of the cookware body sheet, it is placed on an embossing machine. The embossing machine embosses the raw material of the cookware body sheet, creating different patterns inside the cookware. The embossed raw material is then stretched through a mold to form a preliminary shape of the cookware body. Then, a stamping machine is used to close the edges of the raw material and perform multiple embossing processes to create a layered texture, forming the cookware body. In this application, titanium metal makes the entire non-stick cookware lighter and easier to use. The pure aluminum intermediate layer increases heat conduction efficiency, improving the non-stick effect. Multiple polishing processes make the surface of the non-stick cookware smoother, enhancing its non-stick performance and appearance. Micropores are etched on the surface of the cookware body using an ultra-short pulse laser device, achieving the non-stick effect.

The invention provides a photoelectric oscillator and a signal processing method. The invention relates to the technical field of photoelectricity, and in the photoelectric oscillator, an electro-optical modulator, a photoelectric detector, a first filter and a power divider form a photoelectric oscillation loop. Compared with a conventional single-passband filter, the first filter in the photoelectric oscillation loop has the advantages that a low-frequency passband is added, and a pulse sequence of the low-frequency passband and a band-pass passband can be excited in the photoelectric oscillation loop. Due to the fact that oscillation of the pulse signal can automatically narrow the pulse sequence to form the ultra-short pulse sequence, on the premise that the pulse sequence excited by the band-pass passband passes through an oscillation mechanism in the photoelectric oscillation loop to narrow the pulse, the pulse sequence excited by the low-frequency passband can further narrow the pulse, and the ultra-short pulse sequence is formed. Therefore, the photoelectric oscillator can generate a microwave pulse sequence which is shorter than that of a conventional photoelectric oscillator, namely an ultra-short microwave pulse sequence.

Disclosed are methods, systems and non-transitory computer readable memory for free-space optical (FSO) communications. For instance, a communications network may include FSO optical transceiver terminals located at remote electrically unpowered locations within the communications network. A remote unpowered FSO terminal located at a far-end location receives necessary optical power from a powered base station location (near-end) required for all optical amplification functions for NRZ or RZ format signals within the spectral range of 900 nm to 1480 nm as well as an Ultra Short Pulsed Laser (USPL) centered at 1560 nm at the far-end location. A transmitting node transmits an optical signal identified as a pump signal to a remote location over a free space medium, such as the atmosphere, where the remote location does not have available electrical power for operation of electro-optic components required for transmission and retransmission functions.

The invention relates to a picosecond laser vision self-adaptive intelligent cutting method for an OLED screen body, and the method comprises the steps: obtaining the surface image data of a to-be-cut OLED screen body in real time, and recognizing the actual contour features and position; generating a self-adaptive cutting path matched with the individual features of the OLED screen body in combination with a preset target cutting graph and the recognized actual contour features and positions; according to the self-adaptive cutting path, a picosecond laser cutting head is driven to conduct positioning, and a picosecond laser is started to generate an ultra-short pulse laser beam; and laser cutting operation is carried out on the OLED screen body along the self-adaptive cutting path, so that the purpose of improving the cutting precision, quality and adaptability of the special-shaped screen is achieved.

The application discloses a kind of laser grinding composite processing preparation methods of titanium alloy wear-resistant friction-reducing surface, comprising the following steps: step one: polishing: after polishing treatment, titanium alloy sample is ultrasonic cleaned;Step two: surface modification: titanium alloy sample is placed on ultra-short pulse laser processing platform, and laser modification treatment is carried out to titanium alloy sample surface, so that titanium alloy sample surface material is modified to generate TiO2 Ceramic modification layer in situ under the action of laser;Step three: grinding and polishing: titanium alloy sample is placed on abrasive belt grinding processing platform, and titanium alloy sample is ground and polished, to remove the defects on the surface of TiO2 Ceramic modification layer and obtain a finished surface;Step four: ultrasonic cleaning: titanium alloy sample is ultrasonic cleaned, and titanium alloy sample with wear-resistant friction-reducing surface is obtained.The application can improve the hardness and wear resistance of titanium alloy wear-resistant friction-reducing surface, and reduce the friction coefficient of titanium alloy wear-resistant friction-reducing surface, to improve service life and reliability.

The application discloses a kind of ultra-short pulse width multi-path broadening system and method, it is related to high-power ultra-short pulse amplification field.The multi-path broadening system includes at least one body bragg grating and polarization reflection unit;The multi-path broadening system utilizes optical path design to make pulse laser multiple times through body bragg grating, realizes the multi-path body bragg grating pulse broadening of pulse laser in system by adjusting the polarization state of light beam.Compared with prior art, the application utilizes optical path design to make pulse laser multiple times vertically through body bragg grating, realizes the multi-path body bragg grating pulse broadening of pulse laser in system by adjusting the polarization state of light beam, so as to realize the great broadening of pulse width to nanosecond above, greatly reduce the complexity of system without the help of additional devices such as optical fiber, increase the stability of system, and realize high-power laser output.

The invention discloses a substrate structure and a substrate surface treatment method and device.The method comprises the steps that a transparent inorganic substrate is provided, and the roughness Ra of the to-be-treated surface of the substrate ranges from 0.1 micrometer to 20 micrometers; an energy absorption layer is at least formed on the to-be-treated surface of the substrate, the energy absorption layer completely covers the micro protrusions and the micro pits on the to-be-treated surface of the substrate, and the energy absorption coefficient of the energy absorption layer is larger than that of the substrate; ultra-short pulse laser is adopted to irradiate the substrate, so that phase explosion happens to the energy absorption layer, multi-photon absorption happens to the micro-protrusion area, and under the action of phase explosion and multi-photon absorption, the laser conducts cold cutting on the micro-protrusions; wherein the wavelength lambda of the ultrashort pulse laser ranges from n * Ra / 10 to n * Ra, and n is the refractive index of the substrate. According to the method, under the combined action of phase explosion and multi-photon absorption, the micro-protrusions are subjected to cold cutting through laser, so that the micro-protrusions on the surface to be treated are stripped, and the substrate structure is not damaged.

The invention is suitable for the technical field of micro-needle radio frequency treatment equipment, and provides a micro-needle dot matrix partition control method based on HFSS simulation verification, and the method comprises the steps: firstly, dividing a micro-needle dot matrix into a plurality of independent regions through a composite partition method; then, establishing an accurate electromagnetic simulation model by using HFSS software, obtaining energy distribution data of each region, and calculating a power compensation coefficient according to the energy distribution data; then, according to the maximum interval priority principle, activating the partitions in sequence according to a specific round sequence, and controlling ultra-short pulse output of radio frequency energy by adopting a microsecond-level high-speed switch so as to weaken energy superposition; and finally, through a multi-channel solid-state relay switching circuit and a high-precision impedance detection closed-loop module, rapid partition switching and constant-power precise output in a wide impedance range are realized. According to the invention, through combination of simulation guidance design and intelligent control, energy uniformity of a treatment area, treatment safety and comfort of a patient are significantly improved.

A kind of femtosecond laser synchronization device and method based on hollow-core anti-resonant optical fiber, comprising: first mirror, second mirror, balanced optical cross correlator, first lens, first vacuum chamber, hollow-core anti-resonant optical fiber, second vacuum chamber, second lens, third mirror, fourth mirror, optical delay line and control unit;The time drift of femtosecond laser pulse is measured by balanced optical cross correlator;When balanced cross correlation signal is not zero, there is time drift between two laser pulses, and the amount of drift is indicated by the intensity of balanced cross correlation signal, and the direction of drift is indicated by the positive and negative of cross correlation signal.Correlation signal is transmitted to control unit for processing and generating control signal, and control optical delay line, and balanced optical cross correlation signal is locked to zero, that is, the long-time synchronization of two femtosecond laser pulses is realized by closed-loop feedback control.The present application realizes the long-time synchronization of two femtosecond laser pulses, and can be used in the fields of ultra-short pulse laser synchronization control, ultrafast pump-probe experimental research, etc.

The invention discloses an end face color dispersion compensation pulse compression device and method based on a batten medium, and relates to the technical field of ultrafast lasers. The device comprises an ultra-short pulse laser light source, ultra-short pulses emitted by the ultra-short pulse laser light source sequentially pass through a spherical lens and a cylindrical lens to achieve beam shaping and then are transmitted to a 45-degree reflector plated with a dispersion compensation film layer sequentially through a first reflector plated with a high-reflection film and a second reflector plated with a high-reflection film. The reflected light beam is introduced into a film-coated fused quartz batten, and under the condition that the damage threshold value of a film layer and a medium is not exceeded, a resonant cavity-like structure formed by a first 0-degree reflector plated with a dispersion compensation film layer, a second 0-degree reflector plated with a dispersion compensation film layer and the film-coated fused quartz batten is utilized; and after the light beam passes through a film-coated fused quartz plate strip for multiple times, quasi-synchronization of spectrum broadening and pulse compression is realized. The device has the advantages of compact structure, high stability, high medium utilization rate, low cost and the like.

The application discloses a kind of uranium mine logging instrument based on ultrashort pulse neutron and working method thereof, it is related to uranium mine exploration well logging field;Logging instrument includes control communication nipple arranged in sequence along its axial direction, ultrashort pulse neutron generator for emitting fast neutron pulse with pulse width less than 1 microsecond to formation, shielding body, dual thermal neutron detection assembly for detecting thermal neutron and superhot neutron on spatially consistent measurement point, gamma detector for detecting non-elastic scattering gamma ray and capture gamma ray emitted by formation element, and fast neutron detector and multichannel synchronization and high-speed acquisition circuit for detecting and outputting source intensity monitoring signal of fast neutron pulse in real time;The logging instrument of the application emits ultrashort fast neutron pulse and detects neutron yield in real time, combines to obtain neutron time spectrum and multi-dimensional information of gamma energy spectrum with accurate time stamp, carries out high-precision, anti-interference inversion to formation uranium content, and efficiently and accurately obtains formation information.

The invention relates to an ultra-short pulse laser spectrum coherent synthesis method based on optical parametric amplification, and belongs to the technical field of ultra-short pulse laser spectrum synthesis. Pulse laser output by an ultra-short pulse laser source is divided into two beams, one beam serves as input signal light after spectrum broadening based on the nonlinear effect, and the other beam serves as output signal light after spectrum broadening based on the nonlinear effect; one light beam is used as pump light after being subjected to frequency multiplication; performing optical parametric amplification on the input signal light and the pump light to generate amplified signal light and idler frequency light with constant carrier envelope phase difference; performing dispersion compensation on the amplified signal light and the idler frequency light to enable the amplified signal light and the idler frequency light to reach a conversion limit pulse width; according to the invention, the technical problems of poor carrier envelope phase stability and difficulty in optical path matching in the aspect of realizing visible / near-infrared band ultra-short pulse laser output by combining optical parametric amplification and spectrum coherent combination in the prior art can be solved by adopting the optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification and spectrum coherent combination integrated optical parametric amplification system.

The invention discloses a far-field signal-to-noise ratio measuring device and method for ultra-strong and ultra-short laser pulses, and belongs to the technical field of laser measurement. After ultra-short pulses to be measured pass through a beam splitter, a light path of signal light to be measured is adjusted by using a first reflector and a second reflector, and the moment when the signal light to be measured reaches a focus position is adjusted by using a delay line; the other path of reference light is subjected to frequency doubling by using a frequency doubling crystal and then is subjected to light splitting by using a dichroscope, the fundamental frequency light as the reference light is adjusted and delayed by a delay line and then reaches the same focal position as the signal light, interference occurs at the focal position, and gas is ionized to form a plasma grating; the frequency doubling light irradiates the plasma grating, diffraction light signals of the probe light under different time delay conditions are read through a CCD, and then signal-to-noise ratio data of the pulse to be measured are obtained through measurement; according to the invention, signal-to-noise ratio data of ultra-short and ultra-strong laser pulses at a far-field position is realized for the first time, and the device has the characteristics of simple optical path, convenient adjustment and accurate pre-pulse measurement for a small laser device.

The application discloses a kind of superlubricated surface preparation method capable of tolerating extreme high contact pressure, belong to mechanical engineering lubrication technical field.The method includes: using ultra-short pulse laser etching system to form regular arrangement micro contact unit on substrate surface;Amorphous carbon lubricating film is deposited on the substrate surface after etching using vapor deposition technology, the amorphous carbon lubricating film covers the contact unit;MXene material is mixed with other two-dimensional lubricating material to form MXene-based hetero-compound, dispersed in solvent to prepare dispersion, sprayed on the surface of amorphous carbon lubricating film, dried to form MXene-based hetero-composite lubricating coating, the superlubricated surface is obtained.The application solves the problem that existing superlubrication technology is easy to fail under atmospheric environment and extreme high contact pressure by micro contact unit design, high hardness amorphous carbon film support and MXene-based hetero-compound lubrication cross-scale synergistic strategy.The prepared superlubricated surface can still maintain stable superlubrication state (friction coefficient <0.01) when contact pressure is up to 12.7 GPa in atmospheric environment, and the service life is more than 10 5 cycles, which has wide application prospect in aerospace, high-end equipment and other extreme working condition lubrication fields.

The application provides a kind of ultrafast time resolution measurement method and system, the system includes four components of supercontinuum white light laser generation, chirp control, multispectral collaborative imaging detection and data fusion processing;Supercontinuum white light laser generation component converts ultra-short pulse laser into supercontinuum white light laser, chirp control component divides supercontinuum white light laser into multiple wavebands of supercontinuum white light laser with time interval, multispectral collaborative imaging detection component is based on multiple wavebands of supercontinuum white light laser and is imaged to the object to be measured for spectroscopy, obtains the image of the object to be measured corresponding to each spectral component, data fusion processing component is based on multiple wavebands of supercontinuum white light laser and the image of the object to be measured corresponding to each spectral component, obtains the dynamic evolution imaging of the transient process of the object to be measured.The application realizes the dynamic evolution imaging of transient process ultrafast time resolution, and the imaging quality is high.

The invention provides an ultra-short pulse laser welding system and method for welding composite materials. The ultra-short pulse laser welding system comprises a laser generating module, a laser welding module and an ultra-short pulse laser welding module, the first laser splitting module is used for distinguishing the laser beams into a first penetrating laser beam and a first reflecting laser beam; the laser measurement module is used for converting the first reflected laser beam into laser measurement information; the laser analysis module is used for analyzing the laser measurement information to obtain laser parameters; the laser galvanometer scanning module is used for reflecting the first penetrating laser beam according to a plurality of rotation angles so as to reflect the first penetrating laser beam to the composite material; and the bearing module is used for bearing the composite material. The pulse width of the laser beam ranges from 50 fs to 500 fs, the repetition frequency of the laser beam ranges from 0.5 GHz to 10 GHz, and the pulse energy of the laser beam ranges from 100 muJ to 1000 muJ. According to the ultra-short pulse laser welding system and method, the welding strength of the welding position of the composite material can be improved.

The application discloses a F92 heat-resistant steel welded joint high-temperature creep life prolonging process and relates to the technical field of material science and engineering. After step 1, post-welding heat treatment, a non-penetrating micro-texture is prepared in the fine-grain heat-affected zone by using an ultra-short pulse laser; 2. A non-contact high-frequency pulse current system is deployed; 3. A high-precision micro-resistance probe is arranged to monitor local resistance; 4. A low-duty cycle pulse is applied for maintenance in the high-temperature steady-state creep stage; 5. When the resistance change rate exceeds a threshold value, high-intensity pulse intervention is triggered; 6. Pulse parameters are dynamically adjusted according to temperature and resistance; 7-9. The texture residual compressive stress and the pulse current are cooperatively used to suppress cavities, repair defects and optimize dislocations; 10. The performance is regularly detected to evaluate the effect. Preferred parameters are as follows: the micro-dimple diameter is 50-100 mu m, the pulse frequency is 10-100 kHz, and the probe accuracy is greater than or equal to 1 mu omega. The process is cooperatively used for monitoring, maintenance and intervention, thereby prolonging the creep life of the joint and being suitable for a service scene of 600-650 DEG C.

This invention relates to the fields of ultrafast lasers and quantum mechanics, and provides a fiber laser device and its operating method for quantum computing. The fiber laser device includes: a resonant cavity unit for generating mode-locked ultrashort pulses; a pre-amplification unit for nonlinearly broadening and amplifying the mode-locked ultrashort pulses; a first distributed dispersion management unit for dispersion modulation and time-domain broadening of the self-similar pulses output from the pre-amplification unit, and for storing chirp; a power amplification unit for power amplification of the broadened pulses output from the first distributed dispersion management unit; a second distributed dispersion management unit for dispersion modulation, pulse compression, and tuning of the broadened pulses output from the power amplification unit; and a frequency conversion unit for performing various nonlinear transformations on the femtosecond-level chirp-free pulses output from the second distributed dispersion management unit to obtain pulse outputs with different center wavelengths for use in quantum computing. It features low chirp, high power, and tunable frequency.

The application discloses a high-peak-power all-fiber femtosecond laser system based on GMN spectrum shaping technology, and belongs to the field of laser technology and nonlinear optics. The system comprises an all-fiber broadband GMN seed source, an all-fiber gain narrowing spectrum shaping system based on a nonlinear amplification ring mirror, a high-power fiber laser amplifier and a pulse compressor. The system comprises the following optical devices: a pump source, a wavelength division multiplexer, a gain fiber, a 2*2 fiber coupler, a beam combiner, a filter, a pump stripper and a grating pair compressor. The high-peak-power all-fiber femtosecond laser system based on GMN spectrum shaping technology can further amplify the broadband light source generated by the GMN technology, and introduces the spectrum shaping gain narrowing technology, so that the output energy and peak power of the laser system are improved while ensuring the output of the ultra-short pulse width femtosecond laser, and the application prospect of the gain management nonlinear amplification technology is widened.

The application provides a compact high-power ultra-short pulse optical parametric amplification device, which is sequentially provided with a glass array, a first blazed grating pair, a slit, a first mirror and a second blazed grating pair along the light path direction; the application controls femtosecond laser to pass through the ultra-thin glass array for spectral broadening, utilizes the grating pair for pulse width compression and utilizes the adjustable slit for frequency width selection, thereby realizing wide-range continuous tuning of optical parameters such as wavelength, pulse width and power of the ultrafast femtosecond laser, and being particularly suitable for high-power hundred femtosecond and sub-hundred femtosecond laser. The device can efficiently convert the incident femtosecond laser, the pulse width and the spectral bandwidth can be continuously adjusted by a large margin, and the stability of the laser output is significantly improved compared with the mode of realizing spectral broadening by using femtosecond laser through high-pressure inert gas; and the device is particularly suitable for being used as a light source parameter tuning in an ultra-high time resolution spectrum test and an ultrafast laser processing system.