High-power pulse laser capable of tuning time space

Abstract

The invention provides a high-power pulse laser capable of tuning time space, which relates to the technical field of laser, and comprises a digital signal source, a pulse modulation module, a multi-channel optical fiber delay module, an optical fiber amplification module, a multi-channel optical fiber collimation module and a grating reflection module, the digital signal source is respectively connected with each pulse modulation unit in the pulse modulation module; the pulse modulation module is connected with the multi-channel optical fiber delay module; the multi-channel optical fiber delay module is connected with the optical fiber amplification module; the optical fiber amplification module is connected with the multi-channel optical fiber collimation module; and the laser output by the multi-channel optical fiber collimation module is subjected to diffraction beam combination through the grating reflection module. According to the invention, the output power of the nanosecond pulse laser can be expanded.

Description

Technical Field

[0001] The invention relates to the field of laser technology, and in particular to a high-power pulse laser capable of tunable time and space. Background Art

[0002] High-power pulsed lasers have the characteristics of high power and high peak power. They can release high energy in a very short time and significantly improve the efficiency of laser-matter interaction. This type of laser is widely used in advanced manufacturing, scientific research, national defense and other fields. For example, MOPA pulsed lasers can output pulsed lasers with an average power of more than 1 kilowatts and a peak power of more than 100 kilowatts. The changes they bring in laser cleaning, hard and brittle material processing, semiconductors and other fields are becoming more and more profound.

[0003] A Chinese patent with publication number CN118794549A discloses a real-time optical path difference measurement and control device and method for a fiber laser coherent combining system, including a fiber laser coherent combining system and a dynamic optical path difference control module; a phase modulator, a high-speed fiber delay line, a wavelength division multiplexer, an amplifier and a fiber collimator are arranged on the transmission optical path of each laser path in the fiber laser coherent combining system; the high-speed fiber delay line is used to compensate for the dynamic optical path difference in real time, and a dynamic optical path difference control module is connected between the high-speed fiber delay line and the wavelength division multiplexer corresponding to each laser path, and the dynamic optical path difference control module emits a detection laser, and the end face of the fiber collimator corresponding to each laser path can reflect the detection laser, and by detecting the detection laser reflected back from the end face of the fiber collimator corresponding to each laser path, the corresponding optical path is calculated and compensated in real time. In the above scheme, sub-beam lasers are output from the same seed, and the delay amount needs to be calculated for each sub-beam to achieve real-time optical path closure and phase closure. However, the performance requirements of the high-speed delay line are extremely high and the number of output sub-beams is limited, resulting in limited improvement in the output power of the laser. Therefore, it is very necessary to provide a high-power pulsed laser that can be tunable in time and space to improve the output power of the laser. Summary of the invention

[0004] In view of this, the present invention proposes a high-power pulsed laser that can be tunable in time and space. The processing capacity and scalability of the pulsed laser are significantly improved by setting a multi-channel parallel structure, and each pulse modulation unit can independently adjust the pulse repetition rate and pulse width, avoiding the nonlinear effect that may be caused by single-stage amplification, and significantly improving the output power of the laser.

[0005] The present invention provides a high-power pulse laser with tunable time and space, including a digital signal source, a pulse modulation module, a multi-channel optical fiber delay module, an optical fiber amplification module, a multi-channel optical fiber collimation module and a grating reflection module, wherein:

[0006] The digital signal source is respectively connected to each pulse modulation unit in the pulse modulation module, and the digital signal source is used to input a digital signal to each pulse modulation unit;

[0007] The pulse modulation module is connected to the multi-channel optical fiber delay module, and the pulse modulation module is used to adjust the repetition frequency and pulse width of the generated pulse light according to the digital signal;

[0008] The multi-channel optical fiber delay module is connected to the optical fiber amplification module, and the multi-channel optical fiber delay module is used to adjust the single-path delay amount of the pulse light output by each pulse modulation unit;

[0009] The optical fiber amplification module is connected to the multi-channel optical fiber collimation module, and the optical fiber amplification module is used to perform multi-stage amplification on the multi-channel input pulse light, and output the amplified pulse light to the multi-channel optical fiber collimation module;

[0010] The multi-channel fiber collimation module is used to collimate each pulse light after being amplified by the fiber amplification module, and the grating reflection module is used to converge multiple pulse lights to one point to output an integrated pulse light synthesized from the multiple pulse lights.

[0011] On the basis of the above technical solution, preferably, the pulse modulation module includes a plurality of pulse modulation units arranged in parallel, the pulse modulation unit includes a signal amplifier, a laser seed source and an amplitude modulator, the signal amplifier is electrically connected to the digital signal source and the amplitude modulator respectively, and the laser seed source is connected to the amplitude modulator.

[0012] On the basis of the above technical solution, preferably, the central wavelength of the laser seed source in each pulse modulation unit is different, and the difference between the central wavelengths of any two laser seed sources is the same.

[0013] More preferably, the multi-channel fiber optic delay module comprises a plurality of fiber optic delay lines corresponding to the pulse modulation units, and the fiber optic delay lines are used to compensate for the static optical path difference of the pulse light output by each pulse modulation unit.

[0014] More preferably, the optical fiber delay line is controlled by an electric displacement stage, the displacement length of the electric displacement stage is 150 mm, and the pulse delay control amount of the electric displacement stage is 1 ns.

[0015] Further preferably, the fiber amplification module includes multiple fiber amplification units corresponding to the pulse modulation unit, and the fiber amplification unit includes a first fiber amplifier, a second fiber amplifier and a third fiber amplifier connected in sequence, the first fiber amplifier includes a 10 / 125YB gain fiber, the second fiber amplifier includes a 20 / 400YB gain fiber, and the third fiber amplifier includes a 30 / 400YB gain fiber.

[0016] More preferably, the multi-channel fiber collimation module comprises a plurality of fiber collimators arranged at equal intervals, and the center interval between any two fiber collimators is 8 mm.

[0017] More preferably, the grating reflection module includes a first grating and a second grating arranged in parallel, the first grating and the second grating are both blazed gratings, and the resolutions of the first grating and the second grating are both 800lp / mm.

[0018] More preferably, the amplitude modulator is a Mach-Zehnder electro-optic modulator.

[0019] More preferably, the central wavelength range of the laser seed source is 1058 nm to 1078 nm, and the line width range of the laser seed source is 8 GHz to 12 GHz.

[0020] The high-power pulsed laser with tunable time and space provided by the present invention has the following beneficial effects compared with the prior art:

[0021] (1) The processing capability and scalability of the pulse laser are significantly improved by setting up a multi-channel parallel structure. Each pulse modulation unit can independently adjust the pulse repetition rate and pulse width to meet the diverse needs of different application scenarios. In addition, the intensity of the pulse light can be gradually improved through the multi-stage fiber amplification module, ensuring a significant increase in the output power and avoiding the nonlinear effect that may be caused by single-stage amplification, thereby ensuring the stability of the amplification process. At the same time, the combination of the fiber collimation module and the reflection module not only ensures the high-quality collimation of the multi-path pulse light, but also realizes the effective integration of the light beam, so that the final output pulse light has good uniformity and consistency in space, further enhancing the overall performance of the laser.

[0022] (2) High-precision and flexible pulse control is achieved through multiple pulse modulation units arranged in parallel. The central wavelength of each unit is different. The central wavelength difference between any two seed sources is consistent, ensuring the wavelength coordination and synchronization of multiple pulse lights. The digital signal source generates a digital control signal containing pulse repetition rate and pulse width parameters. The repetition frequency and pulse width of the pulse light are accurately adjusted through signal amplification and amplitude modulator. Laser seed sources with different central wavelengths enable the system to synchronously generate pulse light at multiple wavelengths, enhancing the overall consistency and power output of the light beam. The multi-channel fiber delay module and fiber amplifier module perform multi-stage amplification and time delay management on the pulse light, ensuring the precise integration of the pulse light in space and time. The stability and adaptability of the laser are enhanced through the synchronous regulation of different central wavelengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a high-power pulse laser with tunable time and space provided by the present invention.

[0025] Explanation of the accompanying drawings: 1. digital signal source; 2. pulse modulation module; 21. pulse modulation unit; 211. signal amplifier; 212. laser seed source; 213. amplitude modulator; 3. multi-channel fiber delay module; 4. fiber amplification module; 41. fiber amplification unit; 5. multi-channel fiber collimation module; 6. grating reflection module; 61. first grating; 62. second grating. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the present invention provides a high-power pulse laser with tunable time and space, including a digital signal source 1, a pulse modulation module 2, a multi-channel fiber delay module 3, a fiber amplification module 4, a multi-channel fiber collimation module 5 and a grating reflection module 6, wherein:

[0028] The digital signal source 1 is respectively connected to each pulse modulation unit 21 in the pulse modulation module 2 , and the digital signal source 1 is used to input a digital signal to each pulse modulation unit 21 .

[0029] The pulse modulation module 2 is connected to the multi-channel optical fiber delay module 3, and the pulse modulation module 2 is used to adjust the repetition frequency and pulse width of the generated pulse light according to the digital signal.

[0030] In this embodiment, the digital signal source 1 is responsible for generating and outputting digital control signals. These signals contain parameter information such as the repetition frequency and pulse width of the pulse light. The timing control signal provided by the digital signal source 1 determines the emission interval of the laser pulse, thereby adjusting the repetition frequency of the pulse. By changing the timing parameters in the digital signal, the dynamic adjustment of the pulse repetition frequency can be achieved. The amplitude modulation information in the digital signal controls the amplitude modulator 213 to accurately adjust the width of the laser pulse. By adjusting the amplitude and duration of the modulation signal, the pulse modulation module 2 can generate pulse light with different pulse widths.

[0031] Each pulse modulation unit 21 receives a digital signal from a digital signal source 1. The signal amplifier 211 first amplifies the input digital signal to ensure that the signal strength meets the subsequent modulation requirements. The amplified digital signal further drives the amplitude modulator 213 to modulate the laser pulse. By adjusting the working parameters of the amplitude modulator 213, the repetition rate and pulse width of the pulse laser output by the seed source can be accurately controlled.

[0032] In this embodiment, the digital signal source 1 can generate and output a digital control signal including pulse light repetition rate and pulse width parameters. These signals are amplified by the signal amplifier 211 to ensure that their intensity meets the modulation requirements of the pulse modulation module 2, and the amplitude modulator 213 accurately modulates the pulse light output by the laser seed source 212 according to the timing control and amplitude information in the digital signal. Specifically, the timing control signal determines the emission interval of the pulse and realizes the dynamic adjustment of the pulse repetition rate. The amplitude modulation information accurately controls the pulse width, and generates pulse light of different pulse widths by adjusting the amplitude and duration of the modulation signal. Each pulse modulation unit 21 independently receives and processes the signal from the digital signal source 1 to ensure multi-channel synchronization or independent adjustment. This mechanism not only realizes the high controllability and flexibility of the pulse light in repetition rate and pulse width, meets the diverse application requirements, but also improves the overall stability and accuracy of the laser.

[0033] The pulse modulation module 2 includes a plurality of pulse modulation units 21 arranged in parallel, and the pulse modulation unit 21 includes a signal amplifier 211, a laser seed source 212 and an amplitude modulator 213. The signal amplifier 211 is electrically connected to the digital signal source 1 and the amplitude modulator 213 respectively, and the laser seed source 212 is connected to the amplitude modulator 213. The amplitude modulator 213 is a Mach-Zehnder electro-optical modulator. The central wavelength range of the laser seed source 212 is 1058nm to 1078nm, and the line width range of the laser seed source 212 is 8GHz to 12GHz. In addition, the central wavelength of the laser seed source 212 in each pulse modulation unit 21 is different, and the difference between the central wavelengths of any two laser seed sources 212 is the same.

[0034] Furthermore, the laser amplitude modulator 213 is usually an electro-optic modulator or an acousto-optic modulator. The seeds output lasers with a certain line width (≥10 GHz) to suppress stimulated Brillouin scattering during the amplification process, while the central wavelength is stable and the wavelength interval between two adjacent seeds is the same.

[0035] In this embodiment, high-precision and flexible pulse control is achieved through multiple pulse modulation units 21 arranged in parallel. The central wavelength range of the laser seed source 212 is 1058nm to 1078nm, and the central wavelength of each unit is different. The central wavelength difference of any two seed sources is consistent, ensuring the wavelength coordination and synchronization of multi-channel pulse light. The digital signal source 1 generates a digital control signal containing pulse repetition frequency and pulse width parameters, and the repetition frequency and pulse width of the pulse light are accurately adjusted through the signal amplification and amplitude modulator 213. The laser seed sources 212 with different central wavelengths enable the system to synchronously generate pulse light at multiple wavelengths, enhancing the overall consistency and power output of the light beam. The multi-channel fiber delay module 3 and the fiber amplifier module 4 perform multi-stage amplification and time delay management on the pulse light, ensuring the precise integration of the pulse light in space and time. The stability and adaptability of the laser are enhanced through the synchronous regulation of different central wavelengths.

[0036] The multi-channel fiber delay module 3 is connected to the fiber amplifier module 4, and the multi-channel fiber delay module 3 is used to adjust the single-path delay amount of the pulse light output by each pulse modulation unit 21. The multi-channel fiber delay module 3 includes a plurality of fiber delay lines corresponding to the pulse modulation units 21, and the fiber delay lines are used to compensate for the static optical path difference of the pulse light output by each pulse modulation unit 21. The fiber delay line is controlled by an electric displacement stage, the displacement length of the electric displacement stage is 150 mm, and the pulse delay control amount of the electric displacement stage is 1 ns.

[0037] In this embodiment, by configuring multiple optical fiber delay lines corresponding to the pulse modulation unit 21, precise control of the delay amount of each pulse light is achieved. Each optical fiber delay line is controlled by an electric displacement stage with a displacement length of 150mm, which can achieve a pulse delay control accuracy of 1ns. It can not only effectively compensate for the static optical path difference between the pulse lights, but also ensure the precise timing synchronization of multiple pulse lights, so that the multiple pulse lights can be transmitted and integrated according to the preset timing, providing a reliable timing basis for subsequent optical fiber amplification and beam integration, thereby ensuring that the time characteristics and spatial characteristics of the final output pulse light are precisely controlled, meeting the strict requirements for timing accuracy of high-power pulse lasers in various application scenarios.

[0038] The optical fiber amplification module 4 is connected to the multi-channel optical fiber collimation module 5, and the optical fiber amplification module 4 is used to perform multi-stage amplification on the multi-channel input pulse light, and output the amplified pulse light to the multi-channel optical fiber collimation module 5. The optical fiber amplification module 4 includes a plurality of optical fiber amplification units 41 corresponding to the pulse modulation unit 21, and the optical fiber amplification unit 41 includes a first optical fiber amplifier, a second optical fiber amplifier, and a third optical fiber amplifier connected in sequence, the first optical fiber amplifier includes a 10 / 125YB gain optical fiber, the second optical fiber amplifier includes a 20 / 400YB gain optical fiber, and the third optical fiber amplifier includes a 30 / 400YB gain optical fiber.

[0039] In this embodiment, by using a plurality of fiber amplification units 41 corresponding to the pulse modulation unit 21, each amplification unit realizes the step-by-step amplification of the pulse light through the series structure of the three-stage fiber amplifier. The first fiber amplifier in the amplification unit uses 10 / 125YB gain fiber for primary amplification, the second fiber amplifier uses 20 / 400YB gain fiber to achieve intermediate power boost, and the third fiber amplifier uses 30 / 400YB gain fiber to complete the final high-power amplification. This design of gradually increasing the fiber core diameter and cladding diameter not only effectively suppresses the generation of nonlinear effects, but also improves the energy conversion efficiency and ensures the beam quality at high power output. The multi-stage amplification structure enables each amplifier to operate in its optimal working state, significantly improving the stability and reliability of the laser.

[0040] The multi-channel fiber collimation module 5 is used to collimate each pulse light after being amplified by the fiber amplifier module 4, and the grating reflection module 6 is used to converge the multiple pulse lights to one point to output the integrated pulse light synthesized by the multiple pulse lights. The multi-channel fiber collimation module 5 includes a plurality of fiber collimators arranged at equal intervals, and the center interval between any two fiber collimators is 8 mm. The grating reflection module 6 includes a first grating 61 and a second grating 62 arranged in parallel, and the first grating 61 and the second grating 62 are both blazed gratings, and the resolution of the first grating 61 and the second grating 62 is 800 lp / mm.

[0041] In this embodiment, the multi-channel fiber collimation module 5 and the grating reflection module 6 work together to achieve efficient collimation and precise integration of multi-path pulsed light. The multi-channel fiber collimation module 5 uses fiber collimators arranged at equal intervals to ensure the reasonable spatial distribution of the multi-path light beams and effectively avoid mutual interference between the light beams. The grating reflection module 6 uses two parallel blazed gratings, each with a high resolution of 800lp / mm. The dual grating structure achieves precise convergence of multi-path pulsed light, which not only improves the spatial coherence and energy utilization efficiency of the light beam, but also ensures the spatial characteristics and beam quality of the output pulsed light after integration, so that the laser can output stable, high-quality, high-power pulsed light.

[0042] Implementation principle: the digital signal source 1 usually outputs a TTL signal with a repetition frequency of kHz to MHz and a pulse width of 0.5ns to 100ns. The digital signal is amplified by the signal amplifier 211 to the signal strength required for the amplitude modulator 213 to work, so that the laser output by the seed source is also chopped into a pulse light with a pulse width of 0.5ns to 100ns and a repetition frequency of kHz to MHz. The number of optical delay line channels and the number of pulse light paths are consistent, and the single-path delay adjustment amount is greater than 1ns (300mm). The optical fiber amplifier module 4 adopts a multi-stage structure to amplify the chopped pulse light. Since the laser output wavelength is in the emission spectrum range of Yb ions, the resolution of the reflection grating is required to be higher. The diffraction efficiency of the reflection grating at a certain level should be greater than 95%. The single-path laser with the same direction at different positions is converted into a common aperture and common direction output after two diffractions. The average power and peak power are increased to about N times of the original single path, where N is the number of laser paths.

[0043] By setting up a multi-channel parallel structure, the processing capability and scalability of the pulse laser are significantly improved. Each pulse modulation unit 21 can independently adjust the pulse repetition rate and pulse width to meet the diverse needs of different application scenarios. Through the multi-stage fiber amplification module 4, the intensity of the pulse light is gradually improved, ensuring a significant increase in the output power and avoiding the nonlinear effects that may be caused by single-stage amplification, thereby ensuring the stability of the amplification process. At the same time, the combination of the fiber collimation module and the reflection module not only ensures the high-quality collimation of multi-path pulse lights, but also realizes the effective integration of light beams, so that the final output pulse light has good uniformity and consistency in space, further enhancing the overall performance of the laser.

[0044] In one example, as a typical example, the pulse modulation module 2 has 8 pulse modulation units 21, and the central wavelengths of the seed sources in the pulse modulation units 21 are 1058nm, 1060nm, 1062nm, 1064nm, 1066nm, 1068nm, 1070nm, and 1072nm, respectively. After modulation, the line width of the seed source spectrum is about 10GHz, and the output power is greater than 50mW.

[0045] The digital signal source 1 changes the signal level at the output end by controlling the on and off states of the transistor. The digital signal can edit the repetition frequency and pulse width, providing the tunability of the laser. The digital signal source 1 is controlled to output a TTL signal with a repetition frequency of 10Mhz and a pulse width of 1ns. After being divided into multiple paths by the signal beam splitter, the signal amplifier 211 amplifies the TTL signal voltage to 1.7V, which is the half-wave voltage of the electro-optical amplitude modulator 213. The amplitude modulator 213 is a Mach-Zehnder electro-optical modulator, which modulates the laser emitted by the seed source into a pulse laser of 10MHz and 1ns through the combined action of a -2.7V bias DC voltage signal and a 1.7V 10MHz, 1ns TTL signal.

[0046] At this time, the laser modulated by the amplitude modulator 213 enters the 8-channel fiber optic delay line. The 8-channel fiber optic delay line is a precision electric displacement stage that controls the laser optical path. The displacement length of each displacement stage is 150mm, and the corresponding pulse delay control amount for one round trip is 1ns. The displacement accuracy is better than 10μm, and the corresponding pulse time control accuracy is better than 33fs. The optical path difference between different paths is controlled to be less than 300mm.

[0047] The optical lasers output by 38 optical fiber delay lines of the multi-channel optical fiber delay module enter 8 multi-stage optical fiber amplifiers respectively. The optical fiber amplifiers have three stages of amplification in total. Each channel uses a 976nm pump source to drive YB gain fibers with different core diameters. The first stage amplification uses 10 / 125 optical fiber, the second stage amplification uses 20 / 400 optical fiber, and the third stage amplification uses 30 / 400 optical fiber to amplify each optical signal to 1000W. Due to different wavelengths, the YB optical fiber gains of different amplifiers are slightly different. Different lengths of energy transmission fibers are used to pre-compensate the optical path, which ensures that the optical path difference does not exceed 300mm.

[0048] In the multi-channel fiber collimator module 5, 10 fiber collimators are fixed on equally spaced racks. The collimated light beams output by the collimators can make the first grating 61 and the second grating 62 in the grating reflection module 6 within the Rayleigh range of the laser. The center spacing between the collimators is 8 mm. Each output beam can be adjusted to remain parallel and incident on the first grating 61 at the Littrow angle. The resolution of the first grating 61 and the second grating 62 is 800 lp / mm. The pulse light undergoes first-order diffraction on the first grating 61 with an efficiency of 95%. Light beams of different wavelengths eventually converge to the same point due to different diffraction angles. A second grating 62 (which may be of different sizes) with the same parameters as the first grating 61 is placed at this point and is placed parallel to the first grating 61. At this time, the 10 laser beams undergo first-order diffraction again. The first grating 61 makes different lasers converge at the same point to ensure the same laser position. The second grating 62 diffracts at the same angle to compensate for the directional changes caused by the different diffraction angles of different wavelengths. At this point, the spatial overlap of the light beams is completed, and then the delay is adjusted through the 8-channel optical fiber delay line to make the light pulses of different channels overlap in time.

[0049] The amplitude modulator 213, the optical fiber amplifier module 4, the optical fiber amplifier module 4 and the multi-channel optical fiber delay module 3 respectively complete the pulse generation, optical amplification, spatial synthesis and temporal synthesis of the laser, and obtain a high-power pulse laser with an average power of more than 7kW, a peak power of more than 700kW, a repetition rate of 10Mhz and a pulse width of 1ns. The laser repetition rate and pulse width can be tuned by the digital signal source 1, and the laser power can be expanded by increasing the number of laser paths.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-power pulsed laser tunable in time and space, characterized in that: The invention comprises a digital signal source (1), a pulse modulation module (2), a multi-channel optical fiber delay module (3), an optical fiber amplification module (4), a multi-channel optical fiber collimation module (5) and a grating reflection module (6), wherein: The digital signal source (1) is respectively connected to each pulse modulation unit (21) in the pulse modulation module (2), and the digital signal source (1) is used to input a digital signal into each pulse modulation unit (21); The pulse modulation module (2) is connected to the multi-channel optical fiber delay module (3), and the pulse modulation module (2) is used to adjust the repetition frequency and pulse width of the generated pulse light according to the digital signal; The multi-channel optical fiber delay module (3) is connected to the optical fiber amplification module (4), and the multi-channel optical fiber delay module (3) is used to adjust the single-path delay amount of the pulse light output by each pulse modulation unit (21); The optical fiber amplification module (4) is connected to the multi-channel optical fiber collimation module (5), and the optical fiber amplification module (4) is used to perform multi-stage amplification on the multi-channel input pulse light, and output the amplified pulse light to the multi-channel optical fiber collimation module (5); The multi-channel optical fiber collimation module (5) is used to collimate each pulse light after being amplified by the optical fiber amplification module (4), and the grating reflection module (6) is used to converge multiple pulse lights to one point to output integrated pulse light synthesized from the multiple pulse lights.

2. The high-power pulsed laser tunable in time and space as claimed in claim 1, characterized in that: The pulse modulation module (2) comprises a plurality of pulse modulation units (21) arranged in parallel, the pulse modulation unit (21) comprising a signal amplifier (211), a laser seed source (212) and an amplitude modulator (213), the signal amplifier (211) being electrically connected to the digital signal source (1) and the amplitude modulator (213) respectively, and the laser seed source (212) being connected to the amplitude modulator (213).

3. The high-power pulsed laser tunable in time and space as claimed in claim 2, characterized in that: The central wavelengths of the laser seed sources (212) in each pulse modulation unit (21) are different, and the difference between the central wavelengths of any two laser seed sources (212) is the same.

4. The high-power pulsed laser tunable in time and space as claimed in claim 1, characterized in that: The multi-channel optical fiber delay module (3) comprises a plurality of optical fiber delay lines corresponding to the pulse modulation units (21), and the optical fiber delay lines are used to compensate for the static optical path difference of the pulse light output by each pulse modulation unit (21).

5. The high-power pulsed laser tunable in time and space as claimed in claim 4, characterized in that: The optical fiber delay line is controlled by an electric displacement stage, the displacement length of the electric displacement stage is 150 mm, and the pulse delay control amount of the electric displacement stage is 1 ns.

6. The high-power pulsed laser tunable in time and space as claimed in claim 1, characterized in that: The optical fiber amplification module (4) comprises a plurality of optical fiber amplification units (41) corresponding to the pulse modulation unit (21), the optical fiber amplification unit (41) comprising a first optical fiber amplifier, a second optical fiber amplifier and a third optical fiber amplifier connected in sequence, the first optical fiber amplifier comprising a 10 / 125YB gain optical fiber, the second optical fiber amplifier comprising a 20 / 400YB gain optical fiber, and the third optical fiber amplifier comprising a 30 / 400YB gain optical fiber.

7. The high-power pulsed laser tunable in time and space as claimed in claim 1, characterized in that: The multi-channel optical fiber collimation module (5) comprises a plurality of optical fiber collimators arranged at equal intervals, and the center interval between any two optical fiber collimators is 8 mm.

8. The high-power pulsed laser tunable in time and space as claimed in claim 1, characterized in that: The grating reflection module (6) comprises a first grating (61) and a second grating (62) arranged in parallel, the first grating (61) and the second grating (62) are both blazed gratings, and the resolution of the first grating (61) and the second grating (62) are both 800lp / mm.

9. The high-power pulsed laser tunable in time and space as claimed in claim 2, characterized in that: The amplitude modulator (213) is a Mach-Zehnder electro-optic modulator.

10. The high-power pulsed laser tunable in time and space as claimed in claim 2, characterized in that: The central wavelength range of the laser seed source (212) is 1058 nm to 1078 nm, and the line width range of the laser seed source (212) is 8 GHz to 12 GHz.

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