An ultra-short pulse fiber laser system based on dispersion management technology

Abstract

The application relates to an ultrashort pulse fiber laser system based on dispersion regulation technology, and belongs to the technical field of optoelectronic devices.The structure is as follows: the output end of a seed pulse source (1) is connected with the input end of a spectrum narrowing module (2), the output end of the spectrum narrowing module (2) is connected with the input end of a multi-channel pulse time domain segmentation module (3), the output end of the multi-channel pulse time domain segmentation module (3) is connected with the input end of a pulse shaping module (4), the output end of the pulse shaping module (4) is connected with the input end of a multi-channel pulse coherent superposition module (5), and the output end of the multi-channel pulse coherent superposition module (5) is connected with the input end of a pulse width spectrum shaping module (6). The application has the advantages of high output pulse energy, high power and ultrashort pulse width.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optoelectronic devices, and particularly relates to an ultrashort pulse fiber laser system based on dispersion control technology. BACKGROUND

[0002] With the deepening of exploration of the nature, the infrared laser has gradually been unable to meet the growing demand of people. The frequency of the ultraviolet band is several orders of magnitude higher than that of visible light and infrared light, so expanding the infrared band to the ultraviolet, vacuum ultraviolet and even extreme ultraviolet band can obtain higher spectral accuracy and more accurate time and frequency resolution, which provides higher resolution for studying the nonlinear interaction of matter and laser, and promotes the major breakthrough of many basic scientific researches. In addition, the ultraviolet ultrashort pulse has important application value in the fields of ultrashort spectroscopy, laser plasma, high harmonic generation, soft X-ray source and the like due to the characteristics of high photon energy and good focusing characteristics, so it is also an important work to obtain large-energy or high-power ultraviolet ultrashort pulse laser output.

[0003] It is difficult to generate ultrashort high-energy pulses from soliton lasers due to the soliton area theorem. However, pure quartic solitons can make them obtain higher energy than traditional solitons under the condition of short pulse width. Effective high-order dispersion management of the fiber laser is the key technology to obtain pure quartic soliton pulses. However, for the in-cavity high-order dispersion management of the fiber laser, most of the existing researches are to compensate the second-order and third-order dispersion, and other high-order dispersion is usually considered as a perturbation due to the small numerical value.

[0004] There are many dispersion control technologies, and using a prism pair for dispersion management is a commonly used method. However, the prism pair can only effectively compensate the second-order dispersion, and it is difficult to compensate the high-order dispersion of the pulse due to the influence of the material dispersion of the prism itself. Since Szipocs proposed the concept of chirped mirror in 1994, chirped mirrors have also been widely used for dispersion management. The disadvantage of using chirped mirrors for dispersion management is that the manufacturing process is very strict, otherwise it is difficult to meet the design requirements, and the compensation bandwidth of the chirped mirror is limited. However, the spatial light modulator can be used for high-order dispersion management, and the spatial light modulator can only adjust a certain order of dispersion (such as group delay dispersion, third-order dispersion, fourth-order dispersion, etc.), which is flexible and convenient to use.

[0005] In summary, the existing fiber laser systems capable of generating high-power ultraviolet ultrashort pulses each have inherent shortcomings and need to be further improved. SUMMARY

[0006] In order to overcome the limitation of the soliton area theory of the traditional optical fiber laser generated ultra-short pulse, the energy is not high enough, the pulse width is not small enough, the application provides an ultra-short pulse fiber laser system based on dispersion regulation technology, the pure fourth-order soliton pulse is obtained through the high-order dispersion regulation structure based on the spatial light modulator in the seed pulse source module, the ultraviolet ultra-short pulse is obtained through the pulse width spectrum shaping module, so as to obtain the ultraviolet high-power ultra-short pulse.

[0007] The purpose of the application is realized by the following technical scheme:

[0008] An ultra-short pulse fiber laser system based on dispersion regulation technology, which is structured as follows: the output end of a seed pulse source 1 is connected with the input end of a spectrum narrowing module 2, the output end of the spectrum narrowing module 2 is connected with the input end of a multi-channel pulse time domain segmentation module 3, the output end of the multi-channel pulse time domain segmentation module 3 is connected with the input end of a pulse shaping module 4, the output end of the pulse shaping module 4 is connected with the input end of a multi-channel pulse coherent superposition module 5, and the output end of the multi-channel pulse coherent superposition module 5 is connected with the input end of a pulse width spectrum shaping module 5.

[0009] The seed source pulse module 1 has the following structure: a pump source 101 is connected with the 980nm end of a wavelength division multiplexer 102, the 1060nm end of the wavelength division multiplexer 102 is connected with the input end of a first collimator 104 through a first ytterbium-doped fiber 103, after the optical pulse passes through the first collimator 104, a first quarter-wave plate 105, a first half-wave plate 106, a first polarization beam splitter 107, a first isolator 108, a second quarter-wave plate 109, a second collimator 110 and a third collimator 111, the optical pulse is incident on a first mirror 112 through the third collimator 111, the first mirror 112 reflects the optical pulse to a first grating 113, the optical pulse output by the first grating 113 passes through a first convex lens 114, a first spatial light modulator 115 and a second convex lens 116, and is then transmitted to a second grating 117, the second grating 117 reflects the optical pulse to a second mirror 118, and then to a fourth collimator 119. The second collimator 119 is connected with the input end of a first polarizer 120, the output end of the first polarizer 120 is connected with the input end of a first polarization controller 121 through a polarization maintaining fiber, the output end of the first polarization controller 121 is connected with the input end of a second polarization controller 122 through a polarization maintaining fiber, the output end of the second polarization controller 122 is connected with the input end of a second polarizer 123 through a polarization maintaining fiber, and the output end of the second polarizer 122 is connected with the common end of the wavelength division multiplexer 102. The optical pulse is output from the output end of the first polarization beam splitter 107 which is perpendicular to the incident direction.

[0010] The spectral narrowing module 2 has the following optical path structure: a light pulse is transmitted to a third grating 202 via a third reflecting mirror 201; the third grating 202 transmits the light pulse to a fourth reflecting mirror 203, which then reflects it to a fifth reflecting mirror 204. The fifth reflecting mirror 204 reflects the light pulse back to the third grating 202. The pulse output from the third grating 202 is transmitted to a sixth reflecting mirror 206 via a third convex lens 205, and then reflected back to the third grating 202 via the third convex lens 205. The light pulse is then transmitted to the fourth reflecting mirror 202 via the third grating 202. 3. The light pulse is reflected by the fourth reflector 203 and then by the fifth reflector 204 before entering the third grating 202. The light pulse output from the third grating 202 enters the Pollo prism 207 and is reflected back to the third grating 202. After passing through the third grating 202, the light pulse passes through the fourth reflector 203, the fifth reflector 204, the first grating 202, the third convex lens 205, and the sixth reflector 206 again according to the route described above. After multiple reflections, it returns to the third grating 202 and is output through the third grating 202.

[0011] The multi-channel pulse time-domain segmentation module 3 has the following optical path structure: A light pulse is incident on a third convex lens 301; after passing through a fourth convex lens 301, an acousto-optic modulator 302, and a fifth convex lens 303, the light pulse is incident on a seventh reflecting mirror 304 via the fifth convex lens 303; the light pulse pumped by the first laser diode 321 passes through a third half-wave plate 322 and a seventh convex lens 323, and then pumps a first Nd:YVO4 crystal 305 from the side; the light pulse is reflected by the seventh reflecting mirror 304 back to the first Nd:YVO4 crystal 305; the light pulse is transmitted through the first Nd:YVO4 crystal 305 to an eighth reflecting mirror 306; the light pulse reflected by the eighth reflecting mirror 306 passes through a second isolator 307 and a sixth convex lens 308. The light pulse is then incident on the ninth reflector 309. The light pulse reflected by the ninth reflector 309 passes through the second half-wave plate 310 and is incident on the eighth reflector 311. The light pulse is reflected by the tenth reflector 311 to the first Nd:YVO4 crystal 305. The light pulse then passes through the first Nd:YVO4 crystal 305 and is transmitted to the eleventh reflector 312. The light pulse passes through the eleventh reflector 312 and is transmitted to the third isolator 313. The light pulse passing through the third isolator 313 passes through the eighth convex lens 314 and is incident on the twelfth reflector 315. The light pulse is reflected by the twelfth reflector 315 to the ninth convex lens 316. The light pulse passes through the ninth convex lens 316 and is incident on the thirteenth reflector 317. The light pulse is reflected by the thirteenth reflector 317 and passes through the tenth convex lens 317. The light pulse is transmitted from mirror 318 and the eleventh convex lens 319 to the fourteenth reflecting mirror 320. The light pulse is reflected by the fourteenth reflecting mirror 320 to the second Nd:YVO4 crystal 324. The pump light generated by the second laser diode 328 passes through the fourth half-wave plate 327 and the twelfth convex lens 326, pumping the second Nd:YVO4 crystal 324 from the side. The light pulse output from the second Nd:YVO4 crystal 324 is incident on the fifteenth reflecting mirror 325, reflected by the fifteenth reflecting mirror 325 to the sixteenth reflecting mirror 329. The light pulse passes through the fifth half-wave plate 330 to the input end of the second polarization beam splitter 331. The light pulse is then transmitted from the output end of the second polarization beam splitter 331 perpendicular to the incident direction through the third quarter-wave plate 332 to... The seventeenth reflector 333 reflects the light pulse back to the third quarter-wave plate 332. The third quarter-wave plate 332 then transmits the light pulse to the second polarizing beam splitter 331. Simultaneously, the light pulse travels from another port of the first polarizing beam splitter 331 perpendicular to the incident direction, through the fourth quarter-wave plate 334, to the eighteenth reflector 335 and the first piezoelectric actuator 336. The light pulse is then reflected back to the fourth quarter-wave plate 334 by the eighteenth reflector 335. The fourth quarter-wave plate 334 then transmits the light pulse back to the second polarizing beam splitter 331. The light pulse is output from the port of the second polarizing beam splitter 331 parallel to the incident direction and transmitted through the sixth half-wave plate 337 to the third polarizing beam splitter 338.A light pulse travels from the port of the third polarizing beamsplitter 338 perpendicular to the incident direction, through the fifth quarter-wave plate 339, to the nineteenth reflector 340. The nineteenth reflector 340 reflects the light pulse back to the fifth quarter-wave plate 339, which then transmits it back to the third polarizing beamsplitter 338. Simultaneously, a light pulse travels from the other port of the third polarizing beamsplitter 338 perpendicular to the incident direction, through the sixth quarter-wave plate 341, to the twentieth reflector 342 and the second piezoelectric actuator 343. The light pulse is then reflected back to the sixth quarter-wave plate 341 by the twentieth reflector 342, and again transmitted to the third polarizing beamsplitter 338. The light pulse is then output from the output port of the third polarizing beamsplitter 338 parallel to the incident direction.

[0012] The pulse shaping module 4 has the following optical path structure: the light pulse is incident on the tilted chirped Bragg grating 408 after passing through the thirteenth convex lens 401 and the fourteenth convex lens 402. The long-wavelength component of the light pulse is transmitted from the back of the tilted chirped Bragg grating 408 to the twenty-first reflector 406. After being reflected by the twenty-first reflector 406, it is transmitted to the second spatial light modulator 407 and then incident from the second spatial light modulator 407 to the twenty-first reflector 406. The twenty-first reflector 406 reflects the light pulse back to the second spatial light modulator 407. The light pulse is fused with the short-wave component reflected from the front surface of the tilted chirped Bragg grating 408 after it is incident on the tilted chirped Bragg grating 408. The light pulse is then transmitted through the seventh half-wave plate 405 to the first thin-film polarizer 404. The light pulse is split into a main light pulse and a rejection light pulse by the first thin-film polarizer 404. The rejection light pulse is transmitted through the first thin-film polarizer 404 to the beam cutoff 403. The main light pulse is reflected by the first thin-film polarizer 404 to the wedge beam splitter 409 and then output through the wedge beam splitter 409.

[0013] The multi-channel pulse coherent superposition module 5 has the following optical path structure: A light pulse is incident on the input end of the first beam splitter 5001, and transmitted from the output end of the first beam splitter 5001 to the twenty-second reflector 5002. The light pulse is reflected by the twenty-second reflector 5002 to the twenty-third reflector 5003, and then reflected by the twenty-third reflector 5003 to the twenty-fourth reflector 5004. The twenty-fourth reflector 5004 reflects the light pulse to the twenty-fifth reflector 5005, and then reflected by the twenty-fifth reflector 5005 to the fifteenth convex lens 5006. After passing through the fifteenth convex lens 5006, the sixteenth convex lens 5007, and the first dichroic mirror 5008, the light pulse is transmitted and output through the first dichroic mirror 5008. The light pulse reflected by the fifty-ninth reflector 5105 and then reflected by the first dichroic mirror 5008 is fused together. The fused light pulse is transmitted through the first dichroic mirror 5008 to the first KTiAsO4 crystal 5009. The light pulse is then transmitted through the first KTiAsO4 crystal 5009 to the second dichroic mirror 5010. The short-wavelength light pulse reflected from the second dichroic mirror 5010 is transmitted to the twenty-sixth reflector 5101. The long-wavelength light pulse transmitted from the second dichroic mirror 5010 is transmitted to the third dichroic mirror 5011. The light pulse reflected by the third dichroic mirror 5011 is transmitted to the twenty-seventh reflector 5102. The light pulse transmitted from the third dichroic mirror 5011 is incident on the twenty-eighth reflector 5012. The light pulse is then reflected by the twenty-eighth reflector... The light pulse is reflected by mirror 5012 to the twenty-ninth mirror 5013, then by the twenty-ninth mirror 5013 to the seventeenth convex lens 5014, then by the seventeenth convex lens 5014 to the eighteenth convex lens 5015, and finally by the eighteenth convex lens 5015 to the thirtieth mirror 5016. The light pulse is reflected by the thirtieth mirror 5016 to the thirty-first mirror 5017, then by the thirty-first mirror 5017 to the thirty-second mirror 5018, then by the thirty-second mirror 5018 to the thirty-third mirror 5019, then by the thirty-third mirror 5019 to the fourth dichroic mirror 5020, and finally by the fourth dichroic mirror 5020 to the second KTiAsO4 crystal 5021. The light pulse then passes through the second KTi... The light pulse transmitted from the AsO4 crystal 5021 is transmitted to the fifth dichroic mirror 5022. The light pulse reflected from the fifth dichroic mirror 5022 is transmitted to the thirty-fourth mirror 5103. The light pulse transmitted from the fifth dichroic mirror 5022 is transmitted to the sixth dichroic mirror 5023. The light pulse reflected by the sixth dichroic mirror 5023 is transmitted to the thirty-fifth mirror 5104. The light pulse transmitted from the sixth dichroic mirror 5023 is incident on the nineteenth convex lens 5024. The light pulse transmitted through the nineteenth convex lens 5024 is transmitted to the twentieth convex lens 5025. The light pulse transmitted through the twentieth convex lens 5025 is incident on the fourth grating 5027. The fourth grating 5027 reflects the light pulse to the fifth grating 5028. The fifth grating 5028 reflects the light pulse to the first roof mirror 5029.After the light pulse reaches the first roof mirror 5029, it is reflected back to the fourth grating 5027 along the input path. The fourth grating 5027 transmits the light pulse to the thirty-sixth reflector 5026. The light pulse is reflected by the thirty-sixth reflector 5026 to the thirty-seventh reflector 5030, then to the thirty-eighth reflector 5031, then to the thirty-ninth reflector 5032, then to the fortieth reflector 5033, and finally to the knife-edge prism 5084. From the other output of the first beam splitter 5001, it is transmitted to the forty-first reflector 5034. The light pulse is then reflected by the forty-first reflector 5034 to... After the forty-second reflecting mirror 5035, the light pulse is reflected to the forty-third reflecting mirror 5036, then to the forty-fourth reflecting mirror 5037, and finally to the forty-fifth reflecting mirror 5038. The light pulse is then reflected by the forty-fifth reflecting mirror 5038 to the nineteenth convex lens 5039. After passing through the twenty-first convex lens 5039 and the twenty-second convex lens 5040, the light pulse is reflected by the twenty-second convex lens 5040 to the seventh dichroic mirror 5041. After being transmitted through the seventh dichroic mirror 5041, the light pulse merges with the light pulse incident along the sixty-second reflecting mirror 5106 and reflected from the seventh dichroic mirror 5041. The merged light pulse then passes through the seventh dichroic mirror... Light pulse 5041 is incident on the third KTiAsO4 crystal 5042. The light pulse is transmitted through the third KTiAsO4 crystal 5042 to the eighth dichroic mirror 5043. The light pulse reflected from the eighth dichroic mirror 5043 is reflected to the forty-sixth mirror 5044. The light pulse transmitted from the eighth dichroic mirror 5043 is transmitted to the ninth dichroic mirror 5045. The light pulse reflected by the ninth dichroic mirror 5045 is transmitted to the forty-seventh mirror 5046. The light pulse output from the ninth dichroic mirror 5045 is incident on the forty-seventh mirror 5046. The light pulse transmitted through the ninth dichroic mirror 5045 is incident on the forty-eighth mirror 5047. The light pulse reflected by the forty-eighth mirror 5047 is reflected to the forty-ninth mirror 5048. After being reflected by the twenty-third convex lens 5049, the light pulse passes through the twenty-third convex lens 5049 and the twenty-fourth convex lens 5050, and is incident on the fiftieth reflecting mirror 5051. The light pulse is reflected by the fiftieth reflecting mirror 5051 to the fifty-first reflecting mirror 5052, then to the fifty-second reflecting mirror 5053, then to the fifty-third reflecting mirror 5054, and finally to the tenth dichroic mirror 5055. After being transmitted through the tenth dichroic mirror 5055, the light pulse merges with the light pulse reflected by the sixty-third reflecting mirror 5083 and then reflected out by the tenth dichroic mirror 5055, and is incident on the fourth KTiAsO4 crystal 5056.The light pulse is transmitted through the fourth KTiAsO4 crystal 5056 to the eleventh dichroic mirror 5057. The light pulse reflected from the eleventh dichroic mirror 5057 is transmitted to the fifty-fourth mirror 5058. The light pulse transmitted from the eleventh dichroic mirror 5057 is transmitted to the twelfth dichroic mirror 5059. The light pulse reflected from the twelfth dichroic mirror 5059 is transmitted to the fifty-fifth mirror 5060. The light pulse transmitted from the twelfth dichroic mirror 5059 is incident on the twenty-fifth convex lens 5061. The light pulse transmitted through the twenty-fifth convex lens 5061 is transmitted to the twenty-sixth convex lens 5062. The light pulse transmitted through the twenty-sixth convex lens 5062 is incident on the sixth grating 5063. The sixth grating 5063 reflects the light pulse onto the seventh grating 5064. The seventh grating 5064... The light pulse is reflected onto the second roof mirror 5065. After reaching the second roof mirror 5066, the light pulse is reflected back to the sixth grating 5063 along the input path. The sixth grating 5063 transmits the light pulse to the fifty-sixth mirror 5066. The light pulse is reflected by the fifty-sixth mirror 5066 to the fifty-seventh mirror 5067, then to the fifty-eighth mirror 5068, and finally to the knife-edge prism 5084. The light pulse pumped by the laser 5069 is transmitted to the thirteenth dichroic mirror 5070. The light pulse reflected from the thirteenth dichroic mirror 5070 passes through the eighth half-wave plate 5071 and is incident on the second thin-film polarizer 5072. After being transmitted through the second thin-film polarizer 5072... The output parallel-polarized light pulse is incident on the fifty-ninth reflector 5105. The light pulse is reflected by the fifty-ninth reflector 5105 to the first dichroic mirror 5008. The vertically polarized light pulse reflected by the second thin-film polarizer 5071 is incident on the third thin-film polarizer 5073. The light pulse is reflected by the third thin-film polarizer 5072 and then transmitted through the ninth half-wave plate 5074 and the second ytterbium-doped fiber 5075 to the sixtieth reflector 5076. The light pulse is reflected by the sixtieth reflector 5076 to the fourth dichroic mirror 5020. The light pulse reflected by the fourth dichroic mirror 5020 merges with the light pulse that has passed through the thirty-third reflector 5019, been incident on the fourth dichroic mirror 5020, and then transmitted out through the fourth dichroic mirror 5020. The merged light pulse is then incident on the... A light pulse from a KTiAsO4 crystal 5021, emitted from the thirteenth dichroic mirror 5070, is transmitted via the sixty-first reflector 5077 to the tenth half-wave plate 5078. The light pulse then travels through the tenth half-wave plate 5078 to the fourth thin-film polarizer 5079. The parallel-polarized light pulse transmitted through the fourth thin-film polarizer 5079 is then transmitted to the sixty-second reflector 5106. The light pulse is reflected by the sixty-second reflector 5106 to the seventh dichroic mirror 5041. The vertically polarized light pulse reflected by the fourth thin-film polarizer 5079 is then transmitted to the fifth thin-film polarizer 5080. After reflection by the fifth thin-film polarizer 5080, the light pulse travels through the eleventh half-wave plate 5081 and the third ytterbium-doped fiber 5082 to the sixty-third reflector 5083.The light pulse is reflected by the sixty-third mirror 5083 to the tenth dichroic mirror 5055, and finally incident on the knife-edge prism 5084. Two light pulses with the same energy and pulse duration are transmitted through the knife-edge prism 5084 to the sixty-fourth mirror 5085. The light pulse is reflected by the sixty-fourth mirror 5085 to the sixty-fifth mirror 5086 and then to the CaF2 lens 5087. The two light pulses are merged by the CaF2 lens 5087, and the merged light pulse is incident on the fourth polarization beam splitter 5088. The light pulse is output from the output end of the fourth polarization beam splitter 5088 perpendicular to the incident direction. The light pulse is reflected by the sixty-sixth mirror 5089 to the sixty-seventh mirror 5090, then to the sixty-eighth mirror 5091, then to the sixty-ninth mirror 5092, and finally reflected back to the fourth polarization beam splitter 5088. The light pulse is output from the output end of beam splitter 5088 parallel to the incident direction. After being output from the fourth polarization beam splitter 5088, the light pulse is transmitted through the twelfth half-wave plate 5093 to the fifth polarization beam splitter 5094. The light pulse is then transmitted along the output end of the fifth polarization beam splitter 5094 perpendicular to the incident direction to the seventieth reflector 5095. The light pulse is reflected by the seventieth reflector 5095 to the seventy-first reflector 5096, and then reflected by the seventy-first reflector 5096 to the seventy-second reflector 5097. 7. The light pulse is reflected by the seventy-second mirror 5097 to the seventy-third mirror 5098, and then reflected back to the fifth polarization beam splitter 5094. The light pulse is output through another output end parallel to the incident direction of the fifth polarization beam splitter 5094. The light pulse is then transmitted through the fifth polarization beam splitter 5094 to the thirteenth half-wave plate 5099, and then to the sixth polarization beam splitter 5100, where it is finally output.

[0014] The pulse width spectrum shaping module 6 has the following optical path structure: the light pulse is incident on the third beam splitter 602 after passing through the second beam splitter 601. A portion of the light pulse after passing through the third beam splitter 602 is transmitted to the seventy-fourth reflector 603. After being reflected by the seventy-fourth reflector 603, the light pulse is reflected sequentially by the seventy-fifth reflector 604, the seventy-sixth reflector 605, and the seventy-seventh reflector 606. The light pulse reflected by the seventy-seventh reflector 606 is incident on the eighth grating 612. The eighth grating 612 reflects the light pulse to the ninth grating 613. The ninth grating 613 reflects the light pulse to the seventy-eighth reflector 614. After reaching the seventy-eighth reflector 614, the light pulse is reflected back to the eighth grating 612 along the input path. The light pulse 612 is transmitted to the seventy-ninth reflector 615. The light pulse is reflected by the seventy-ninth reflector 615 to the seventy-ninth reflector 617, and then incident on the twenty-seventh convex lens 635 via the eightieth reflector 617. Another portion of the light pulse output from the third beam splitter 602 is transmitted to the eighty-first reflector 607. After being reflected by the eighty-first reflector 607, the light pulse passes sequentially through the eighty-second reflector 608, the eighty-third reflector 609, the eighty-fourth reflector 610, and the eighty-fifth reflector 611. The light pulse reflected by the eighty-fifth reflector 611 and the light pulse reflected by the seventy-seventh reflector 606 enter the eighth grating 612 in parallel. As described above, the light pulse incident on the eighth grating 612 from the seventy-seventh reflector 606... The incident light pulse passes sequentially through the eighth grating 612, the ninth grating 613, and the seventy-eighth reflector 614, then returns to the eighth grating 612 along the input path. The light pulse is transmitted from the eighth grating 612 to the seventy-ninth reflector 615, reflected by the seventy-ninth reflector 615 to the eighty-sixth reflector 616, and then incident on the twenty-seventh convex lens 635. The light pulse is transmitted from the other output of the second beam splitter 601 to the eighty-seventh reflector 618, and then to the fourth beam splitter 619. A portion of the light pulse after passing through the fourth beam splitter 619 is transmitted to the eighty-eighth reflector 620, and after reflection by the eighty-eighth reflector 620, it passes sequentially through the eighty-ninth reflector 62. 1. The light pulse reflected by the 90th and 91st reflectors 622 and 623 is incident on the 10th grating 629. The 10th grating 629 reflects the light pulse to the 11th grating 630, and the 11th grating 630 reflects the light pulse to the 92nd reflector 631. After reaching the 92nd reflector 631, the light pulse is reflected back to the 10th grating 629 along the input path. The 10th grating 629 transmits the light pulse to the 93rd reflector 632, and the light pulse is reflected by the 93rd reflector 632 to the 94th reflector 634. The light pulse is then incident on the 27th convex lens 635. Another portion of the light pulse output from the fourth beam splitter 619 is transmitted to the 95th reflector 624.After being reflected by the 95th reflector 624, the light pulse passes sequentially through the 96th reflector 625, the 97th reflector 626, the 98th reflector 627, and the 99th reflector 628. The light pulse reflected by the 100th reflector 628 and the light pulse reflected by the 91st reflector 623 enter the 10th grating 629 in parallel. As described above, the incident path of the light pulse from the 91st reflector 623 to the 10th grating 629 passes sequentially through the 10th grating 629, the 11th grating 630, and the 92nd reflector 631, and returns to the 10th grating 629 along the input path. The light pulse is then transmitted from the 10th grating 629 to the 93rd reflector 63. 2. The light pulse is reflected by the 93rd reflector 632 to the 100th reflector 633, and then incident on the 27th convex lens 635. The four light pulses, which pass through the 86th reflector 616, the 80th reflector 617, the 100th reflector 633, and the 94th reflector 634 respectively, enter the 27th convex lens 635 in parallel. After being focused by the 27th convex lens 635, the light pulses merge. The merged light pulse is then reflected by the 101st reflector 636 to the 102nd reflector 637. The 102nd reflector 637 incident the light pulse onto the 14th half-wave plate 638. The light pulse then passes through the 14th half-wave plate 638... The light pulse is incident on the thirteenth dichroic mirror 643 after passing through the sixth polarizing beam splitter 639, the twenty-eighth convex lens 640, the first LBO crystal 641, and the twenty-ninth convex lens 642. The light pulse is reflected by the thirteenth dichroic mirror 643 to the one hundred and third reflecting mirror 644, then to the first concave mirror 645, and after passing through the first concave mirror 645 and the second LBO crystal 646, it is incident on the second concave mirror 647, then to the one hundred and fourth reflecting mirror 648, and finally to the third concave mirror 649. The light pulse output from the third concave mirror 649 then passes through the B... The light pulse is incident on the fourth concave mirror 651 via the BO crystal 650. After being reflected by the fourth concave mirror 651, it reaches the 105th reflecting mirror 652, then is incident on the first concave mirror 645 via the 105th reflecting mirror 652. After passing through the first concave mirror 645, the light pulse again travels along the path described above, passing through the first concave mirror 645, the second LBO crystal 646, the second concave mirror 647, the 104th reflecting mirror 648, the third concave mirror 649, the BBO crystal 650, and the fourth concave mirror 651. After multiple reflections, the light pulse returns to the fourth concave mirror 651, and is then transmitted through the fourth concave mirror 651 to the 30th convex lens 653 for output.

[0015] Beneficial effects:

[0016] 1. This invention utilizes a transmissive liquid crystal spatial light modulator to design a programmable high-order dispersion adjustment structure to achieve pure fourth-order soliton pulse output, effectively improving pulse energy.

[0017] 2. This invention utilizes doped gain fiber and space optical devices to design a two-stage power amplification structure, which effectively improves pulse power.

[0018] 3. This invention utilizes a reflective liquid crystal spatial light modulator and a chirped Bragg grating to design a second-order high-order dispersion control structure, further compressing the pulse width and achieving ultra-short pulse output.

[0019] 4. This invention utilizes a combination of nonlinear crystal barium metaborate and lithium triborate to design a nonlinear frequency conversion structure, thereby achieving 330nm pulse output. Attached image description:

[0020] Figure 1 This is a block diagram of the overall structure of the present invention.

[0021] Figure 2 This is the optical path diagram of the seed pulse source module used in this invention.

[0022] Figure 3 This is the optical path diagram of the spectral narrowing module used in this invention.

[0023] Figure 4 This is the optical path diagram of the multi-channel pulse time-domain segmentation module used in this invention.

[0024] Figure 5 This is the optical path diagram of the pulse shaping module used in this invention.

[0025] Figure 6 This is the optical path diagram of the multi-channel pulse coherent superposition module used in this invention.

[0026] Figure 7 This is the optical path diagram of the pulse width spectral shaping module used in this invention. Detailed Implementation

[0027] The working principle of the present invention will be further explained below with reference to the accompanying drawings. It should be understood that the component parameters marked in each embodiment are preferred parameters, rather than limitations on the scope of protection.

[0028] Example 1: Overall Structure of the Invention

[0029] like Figure 1 As shown, the overall structure of the present invention includes: the output end of the seed pulse source 1 is connected to the input end of the power adjustment module 2; the output end of the power adjustment module 2 is connected to the input end of the polarization pulse segmentation module 3; the output end of the polarization pulse segmentation module 3 is connected to the input end of the polarization pulse synthesis module 4; and the output end of the polarization pulse synthesis module 4 is connected to the input end of the spectrum shaping module 5.

[0030] Example 2 Seed Pulse Source Module

[0031] The seed source pulse module 1 is structured as follows: pump source 101 (OCLARO LC962U pump source, center wavelength 980nm, maximum single-mode output optical power 750mW) is connected to the 980nm end of wavelength division multiplexer 102 (COMCORE 980 / 1060nm single-mode fiber wavelength division multiplexer); the 1550nm end of wavelength division multiplexer 102 is connected to first collimator 104 (WT&T M011 collimator) via first ytterbium-doped fiber 103 (Thorlabs Er80-4 / 125 ytterbium-doped fiber). The input terminals are connected, and the optical pulse passes through the first collimator 104, the first quarter-wave plate 105 (Hengyang Optics WPZ4310-248 quarter-wave plate), the first half-wave plate 106 (Hengyang Optics WPZ2310-248 half-wave plate), the first polarization beam splitter 107 (Kongtum QTFBC-1216 polarization beam splitter), the first isolator 108 (Hengyang Optics HOI-005-532 isolator), the second quarter-wave plate 109 (Hengyang Optics WPZ4310-248 quarter-wave plate), and the second collimator 104. After collimator 110 (WT&T M011 collimator) and third collimator 111 (WT&T M011 collimator), the light pulse is incident on the first reflecting mirror 112 (Hengyang Optics GMH12-005-AU reflecting mirror) via the third collimator 111. The first reflecting mirror 112 reflects the light pulse onto the first grating 113 (LightSmyth LFSSG-1000-3225-94 grating). The light pulse output from the first grating 113 passes through the first convex lens 114 (Hengyang Optics GLH12-002-002-NIR). After passing through a convex lens, a first spatial light modulator 115 (CRI SLM-256-NIR spatial light modulator), a second convex lens 116 (Hengyang Optics GLH12-002-002-NIR convex lens), the light is transmitted to a second grating 117 (LightSmyth LSFSG-1000-3225-94 grating). The second grating 117 reflects the light pulse to a second reflector 118 (Hengyang Optics GMH12-005-AU reflector), and then to a fourth collimator 119 (WT&T M011 collimator).The second collimator 119 is connected to the input of the first polarizer 120 (Thorlabs ILP1550SM-APC). The output of the first polarizer 120 is connected to the input of the first polarization controller 121 (Thorlabs FPC562) via a polarization-maintaining fiber. The output of the first polarization controller 121 is connected to the input of the second polarization controller 122 (Thorlabs FPC562) via a polarization-maintaining fiber. The output of the second polarization controller 122 is connected to the input of the second polarizer 123 (Thorlabs FPC562) via a polarization-maintaining fiber. The output of the second polarizer 122 is connected to the common terminal of the wavelength division multiplexer 102.

[0032] The light pulse is output from the output end of the first polarization beam splitter 107 perpendicular to the incident direction. The seed pulse source module 1 uses a spatial light modulator to control the high-order dispersion to output a pure fourth soliton pulse.

[0033] Example 3: Spectral Narrowing Module

[0034] The spectral narrowing module 2 has the following optical path structure: the light pulse is transmitted through the third reflector 201 (Hengyang Optics GMH12-005-AU reflector) to the third grating 202 (LightSmyth T-1702-1030s), the third grating 202 transmits the light pulse to the fourth reflector 203 (Hengyang Optics GMH12-005-AU reflector), and then reflects it to the fifth reflector 204 (Hengyang Optics GMH12-005-AU reflector). The fifth reflector 204 reflects the light pulse back to the third grating 202. The pulse output from the third grating 202 is transmitted through the third convex lens 205 (Hengyang Optics GLH12-002-002-NIR convex lens) to the sixth reflecting mirror 206 (Hengyang Optics GMH12-005-AU reflecting mirror), and then reflected back to the third grating 202 by the third convex lens 205. The light pulse is then transmitted through the third grating 202 to the fourth reflecting mirror 203, which reflects the light pulse and then reflects it again by the fifth reflecting mirror 204 before it is incident on the third grating 202. The light pulse output from the third grating 202 is then incident on the Union prism 207. The light pulse is reflected back to the third grating 202 via the Optic POP0012-5 porro prism 207. After passing through the third grating 202, the light pulse passes through the fourth reflector 203, the fifth reflector 204, the third grating 202, the third convex lens 205, and the sixth reflector 206 again, following the route described above. After multiple reflections, the light pulse returns to the third grating 202 and is then output through the third grating 202.

[0035] The function of the spectral narrowing module is to compress the spectral width and widen the pulse width of the light pulse.

[0036] Example 4: Multi-channel pulse time-domain segmentation module

[0037] The multi-channel pulse time-domain segmentation module 3 has the following optical path structure: the light pulse is incident on the fourth convex lens 301 (Hengyang Optics GLH12-002-002-NIR convex lens), and after passing through the fourth convex lens 301, the acousto-optic modulator 302 (Gooch & Housego Fiber-Q acousto-optic modulator), and the fifth convex lens 303 (Hengyang Optics GLH12-002-002-NIR convex lens), the light pulse is incident on the seventh reflector 304 (Hengyang Optics GMH12-005-AU reflector) through the fifth convex lens 303. The first laser diode 321 (DILAS) The light pulse pumped by the MY-series quasi-continuous wave pulsed laser diode passes through the third half-wave plate 322 (Hengyang Optics WPZ3240-248 half-wave plate) and the seventh convex lens 323 (Hengyang Optics GLH12-002-002-NIR convex lens), and then pumps the first Nd:YVO4 crystal 305 (1% doped 5×2×20mm Nd:YVO4 crystal) from the side. The light pulse is reflected by the seventh reflecting mirror 304 back to the first Nd:YVO4 crystal 305. The light pulse transmitted from crystal 305 to the eighth reflecting mirror 306 (Hengyang Optics GMH12-005-AU reflecting mirror). The light pulse reflected by the eighth reflecting mirror 306 passes through the second isolator 307 (Hengyang Optics HOI-005-532 isolator) and the sixth convex lens 308 (Hengyang Optics GLH12-002-002-NIR convex lens) before entering the ninth reflecting mirror 309 (Hengyang Optics GMH12-005-AU reflecting mirror). The light pulse reflected by the ninth reflecting mirror 309 passes through the second half-wave plate 310 (Hengyang Optics GMH12-005-AU reflecting mirror). A half-wave plate (WPZ3240-248 from Hengyang Optics) is incident on the tenth reflecting mirror 311 (GMH12-005-AU reflecting mirror from Hengyang Optics). The light pulse is reflected by the tenth reflecting mirror 311 to the first Nd:YVO4 crystal 305, and then transmitted through the first Nd:YVO4 crystal 305 to the eleventh reflecting mirror 312. The light pulse is then transmitted through the eleventh reflecting mirror 312 (GMH12-005-AU reflecting mirror from Hengyang Optics) to the third isolator 313 (HOI-005-532 isolator from Hengyang Optics). The light pulse, after passing through the third isolator 313, passes through the eighth convex lens 314 (Hengyang Optics GLH12-002-002-NIR convex lens) and enters the twelfth reflecting mirror 315 (Hengyang Optics GMH12-005-AU reflecting mirror). The light pulse is reflected by the twelfth reflecting mirror 315 to the ninth convex lens 316 (Hengyang Optics GLH12-002-002-NIR convex lens), and then enters the thirteenth reflecting mirror 317 (Hengyang Optics GMH12-005-AU reflecting mirror).The light pulse is reflected by the thirteenth reflector 317 and transmitted through the tenth convex lens 318 (Hengyang Optics GLH12-002-002-NIR convex lens) and the eleventh convex lens 319 (Hengyang Optics GLH12-002-002-NIR convex lens) to the fourteenth reflector 320 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then reflected by the fourteenth reflector 320 to the second Nd:YVO4 crystal 324 (0.5% doped 6×4×20mm Nd:YVO4 crystal), and the second laser diode 328 (DILAS). The pump light generated by the MY-series quasi-continuous wave pulsed laser diode passes through the fourth half-wave plate 327 (Hengyang Optics WPZ3240-248 half-wave plate) and the twelfth convex lens 326 (Hengyang Optics GLH12-002-002-NIR convex lens), and then pumps the second Nd:YVO4 crystal 324 from the side. The light pulse output from the second Nd:YVO4 crystal 324 is incident on the fifteenth reflector 325, and reflected by the fifteenth reflector 325 (Hengyang Optics GMH12-005-AU reflector) to the sixteenth reflector 329 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then transmitted through the sixteenth reflector 329 to the fifth half-wave plate 330, and then incident on the second polarization beam splitter 331 (Kongtu) via the fifth half-wave plate 330 (Hengyang Optics WPZ2339-248 half-wave plate). At the input of the M Company QTFBC-1216 polarization beam splitter, a light pulse travels from the output of the second polarization beam splitter 331 perpendicular to the incident direction, through the third quarter-wave plate 332 (Hengyang Optics WPZ4339-248 quarter-wave plate), to the seventeenth mirror 333 (Hengyang Optics GMH12-005-AU mirror). The seventeenth mirror 333 reflects the light pulse back to the third quarter-wave plate 332, which then transmits the light pulse back to the second polarization beam splitter 331. Simultaneously, the light pulse travels from another port of the second polarization beam splitter 331 perpendicular to the incident direction, through the fourth quarter-wave plate 334 (Hengyang Optics WPZ4339-248 quarter-wave plate), to the eighteenth mirror 335 (Hengyang Optics GMH12-005-AU mirror) and the first piezoelectric actuator 336 (GO). After STAGE LLS4545, the light pulse is reflected back to the fourth quarter-wave plate 334 by the eighteenth mirror 335. The fourth quarter-wave plate 334 then transmits the light pulse back to the second polarization beam splitter 331. The light pulse is output from the port of the second polarization beam splitter 331 parallel to the incident direction and transmitted through the sixth half-wave plate 337 (Hengyang Optics WPZ2339-248 half-wave plate) to the third polarization beam splitter 338 (Kongtum QTFBC-1216 polarization beam splitter).The light pulse travels from the port of the third polarizing beam splitter 338 perpendicular to the incident direction, through the fifth quarter-wave plate 339 (Hengyang Optics WPZ4339-248 quarter-wave plate), to the nineteenth reflector 340 (Hengyang Optics GMH12-005-AU reflector). The nineteenth reflector 340 reflects the light pulse back to the fifth quarter-wave plate 339, which then transmits the light pulse back to the third polarizing beam splitter 338. Simultaneously, the light pulse travels from the other port of the third polarizing beam splitter 338 perpendicular to the incident direction, through the sixth quarter-wave plate 341 (Hengyang Optics WPZ4339-248 quarter-wave plate), to the twentieth reflector 342 (Hengyang Optics GMH12-005-AU reflector) and the second piezoelectric actuator 343 (GO STAGE). After LLS4545, the optical pulse is reflected back to the sixth quarter-wave plate 341 by the twentieth mirror 342, and the fourth quarter-wave plate 341 transmits the optical pulse again to the third polarization beam splitter 338.

[0038] The multi-channel pulse time-domain segmentation module 3 reduces the pulse repetition frequency, effectively preventing damage to devices after power amplification. It pre-amplifies the power, compensates for the loss caused by the placement of the acousto-optic modulator in the configuration, and realizes time-division replication of optical pulses.

[0039] Example 5: Pulse Shaping Module

[0040] The pulse shaping module 4 has the following optical path structure: the light pulse passes through the thirteenth convex lens 401 (Hengyang Optics GLH12-002-002-NIR convex lens) and the fourteenth convex lens 402 (Hengyang Optics GLH12-002-002-NIR convex lens) and is incident on the tilted chirped Bragg grating 408 (Teraxion, DMR). The long-wavelength component of the light pulse is transmitted from the back of the tilted chirped Bragg grating 408 to the twenty-first reflector 406 (Hengyang Optics GMH12-005-AU reflector), and then through the twenty-first reflector 406... After reflection, the light pulse is transmitted to the second spatial light modulator 407 (FSLM-4K70-P combined with liquid crystal on silicon reflective spatial light modulator), and then incident from the second spatial light modulator 407 to the twenty-first reflector 406. The twenty-first reflector 406 reflects the light pulse back to the tilted chirped Bragg grating 408. The light pulse is then fused with the short-wavelength component that was previously incident on the tilted chirped Bragg grating 408 and reflected from its front surface. The light pulse is then transmitted through the seventh half-wave plate 405 (Hengyang Optics WPZ2310-248 half-wave plate) to the first thin-film polarizer 404 (Thorlabs). The optical pulse (LPNIRE11S) is split into a main optical pulse and a rejection optical pulse by the first thin-film polarizer 404. The rejection optical pulse is transmitted through the first thin-film polarizer 404 to the beam cutoff 403. The main optical pulse is reflected by the first thin-film polarizer 404 to the wedge beam splitter 409 (Thorlabs BSF2550) and then output through the wedge beam splitter 409.

[0041] The pulse shaping module 4 adjusts the pulse width by controlling the advanced dispersion compression.

[0042] Example 6: Multi-channel pulse coherent superposition module

[0043] The multi-channel pulse coherent superposition module 5 has the following optical path structure: A light pulse is incident on the input of the first beam splitter 5001 (SIGMA OBCL20-1064-R5), and is transmitted from the output of the first beam splitter 5001 to the twenty-second reflector 5002 (Hengyang Optics GMH12-005-AU reflector). The light pulse is reflected by the twenty-second reflector 5002 to the twenty-third reflector 5003 (Hengyang Optics GMH12-005-AU reflector), and then reflected by the twenty-third reflector 5003 to the twenty-fourth reflector 5004 (Hengyang Optics GMH12-005-AU reflector). The twenty-fourth reflector 5004 reflects the light pulse to the twenty-fifth reflector 5005 (Hengyang Optics GMH12-005-AU reflector), and then reflected by the twenty-fifth reflector 5005 to the fifteenth convex lens 5006 (Hengyang Optics G...). The light pulse passes through the fifteenth convex lens 5006, the sixteenth convex lens 5007 (Hengyang Optics GLH12-002-002-NIR convex lens), and the first dichroic mirror 5008 (Thorlabs DMSP1180 dichroic mirror). After transmission through the first dichroic mirror 5008, the light pulse merges with the light pulse reflected from the fifty-ninth reflector 5105 (Hengyang Optics GMH12-005-AU reflector) to the first dichroic mirror 5008. The merged light pulse is then transmitted through the first dichroic mirror 5008 to the first KTiAsO4 crystal 5009 and the fourth KTiAsO4 crystal 5056 (DIENTECH density 3.454 g / cm³). 3The light pulse is transmitted through the first KTiAsO4 crystal 5009 to the second dichroic mirror 5010 (Thorlabs DMSP1180 dichroic mirror). The short-wavelength light pulse reflected from the second dichroic mirror 5010 is transmitted to the twenty-sixth mirror 5101 (Hengyang Optics GMH12-005-AU mirror). The long-wavelength light pulse transmitted from the second dichroic mirror 5010 (Thorlabs DMSP1180 dichroic mirror) is transmitted to the third dichroic mirror 5011 (Thorlabs DMS). The light pulse reflected by the third dichroic mirror 5011 (P1180 dichroic mirror) is transmitted to the twenty-seventh mirror 5102 (Hengyang Optics GMH12-005-AU mirror). The light pulse transmitted from the third dichroic mirror 5011 is incident on the twenty-eighth mirror 5012 (Hengyang Optics GMH12-005-AU mirror), and then reflected by the twenty-eighth mirror 5012 to the twenty-ninth mirror 5013 (Hengyang Optics GMH12-005-AU mirror). Finally, the light pulse is reflected by the twenty-ninth mirror 5013 to the seventeenth convex lens. Lens 5014 (Hengyang Optics GLH12-002-002-NIR convex lens) transmits light through the seventeenth convex lens 5014 to the eighteenth convex lens 5015 (Hengyang Optics GLH12-002-002-NIR convex lens). After passing through the eighteenth convex lens 5015, the light pulse enters the thirtieth reflecting mirror 5016 (Hengyang Optics GMH12-005-AU reflecting mirror). The light pulse is reflected by the thirtieth reflecting mirror 5016 to the thirty-first reflecting mirror 5017 (Hengyang Optics GMH12-005-AU reflecting mirror). The light is reflected by mirror 5017 to mirror 5018 (Hengyang Optics GMH12-005-AU mirror), then by mirror 5018 to mirror 5019 (Hengyang Optics GMH12-005-AU mirror), then by mirror 5019 to mirror 5020 (Thorlabs DMSP1180 dichroic mirror), and finally by mirror 5020 to crystal 5021 (DIENTECH, density 3.454 g / cm³). 3The light pulse is transmitted through the second KTiAsO4 crystal 5021 to the fifth dichroic mirror 5022 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected from the fifth dichroic mirror 5022 is transmitted to the thirty-fourth mirror 5103 (Hengyang Optics GMH12-005-AU mirror). The light pulse transmitted from the fifth dichroic mirror 5022 is transmitted to the sixth dichroic mirror 5023 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected from the sixth dichroic mirror 5023 is transmitted to the thirty-fifth mirror 5103. 04 (Hengyang Optics GMH12-005-AU reflector): The light pulse transmitted from the sixth dichroic mirror 5023 is incident on the nineteenth convex lens 5024 (Hengyang Optics GLH12-002-002-NIR convex lens), and then transmitted through the nineteenth convex lens 5024 to the twentieth convex lens 5025 (Hengyang Optics GLH12-002-002-NIR convex lens), and then incident through the twentieth convex lens 5025 to the fourth grating 5027 (LightSmyth LFSSG-1000-3225-94 grating). 5027 reflects the light pulse to the fifth grating 5028 (LightSmyth LSFSG-1000-3225-94 grating), which then reflects it to the first roof mirror 5029. After reaching the first roof mirror 5029, the light pulse is reflected back to the fourth grating 5027 along the input path. The fourth grating 5027 transmits the light pulse to the thirty-sixth mirror 5026 (Hengyang Optics GMH12-005-AU mirror), which then reflects it to the thirty-seventh mirror 5030. The image is reflected by the thirty-seventh reflector 5030 (Hengyang Optics GMH12-005-AU reflector) to the thirty-eighth reflector 5031 (Hengyang Optics GMH12-005-AU reflector), then by the thirty-eighth reflector 5031 to the thirty-ninth reflector 5032, then by the thirty-ninth reflector 5032 (Hengyang Optics GMH12-005-AU reflector) to the fortieth reflector 5033 (Hengyang Optics GMH12-005-AU reflector), and finally by the fortieth reflector 5033 to the knife-edge prism 5084 (SIGMAKOKI). The KRPB-25-10H beam splitter transmits light pulses from the other output of the first beam splitter 5001 to the forty-first reflector 5034. The light pulses are reflected by the forty-first reflector 5034 (Hengyang Optics GMH12-005-AU reflector) to the forty-second reflector 5035 (Hengyang Optics GMH12-005-AU reflector), then by the forty-second reflector 5035 to the forty-third reflector 5036, and finally by the forty-fourth reflector 5037 (Hengyang Optics GMH12-005-AU reflector).The light pulse is reflected by the forty-fourth reflector 5037 to the forty-fifth reflector 5038 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then reflected by the forty-fifth reflector 5038 to the twenty-first convex lens 5039 (Hengyang Optics GLH12-002-002-NIR convex lens). After passing through the twenty-first convex lens 5039 and the twenty-second convex lens 5040 (Hengyang Optics GLH12-002-002-NIR convex lens), the light pulse finally passes through the twenty-second convex lens 5040. The light pulse at 040 is reflected to the seventh dichroic mirror 5041 (Thorlabs DMSP1180 dichroic mirror). After being transmitted through the seventh dichroic mirror 5041, the light pulse merges with the light pulse reflected from the sixty-second reflecting mirror 5106 (Hengyang Optics GMH12-005-AU reflecting mirror). The merged light pulse then passes through the seventh dichroic mirror 5041 and is incident on the third KTiAsO4 crystal 5042 (DIENTECH, density 3.454 g / cm³). 3The light pulse is transmitted through the third KTiAsO4 crystal 5042 to the eighth dichroic mirror 5043 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected from the eighth dichroic mirror 5043 (Thorlabs DMSP1180 dichroic mirror) is reflected to the forty-sixth mirror 5044 (Hengyang Optics GMH12-005-AU dichroic mirror). The light pulse transmitted from the eighth dichroic mirror 5043 is transmitted to the ninth dichroic mirror 5045 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected by the ninth dichroic mirror 5045 is transmitted to the fourth... The 17th reflector 5046 (Hengyang Optics GMH12-005-AU reflector) receives a light pulse output from the 9th dichroic mirror 5045. This pulse is then incident on the 47th reflector 5046, transmitted through the 9th dichroic mirror 5045, and incident on the 48th reflector 5047 (Hengyang Optics GMH12-005-AU reflector). The pulse is then reflected by the 48th reflector 5047 to the 49th reflector 5048 (Hengyang Optics GMH12-005-AU reflector), and finally reflected by the 49th reflector 5048 to the 23rd convex lens 5049 (Hengyang Optics GLH12-002-002-NIR convex lens). After passing through the twenty-third convex lens 5049 and the twenty-fourth convex lens 5050 (Hengyang Optics GLH12-002-002-NIR convex lens), the light pulse is incident on the fiftieth reflecting mirror 5051 (Hengyang Optics GMH12-005-AU reflecting mirror). The light pulse is reflected by the fiftieth reflecting mirror 5051 to the fifty-first reflecting mirror 5052 (Hengyang Optics GMH12-005-AU reflecting mirror), then reflected by the fifty-first reflecting mirror 5052 to the fifty-second reflecting mirror 5053, and finally reflected by the fifty-second reflecting mirror 5053 (Hengyang Optics GMH12-005-AU reflecting mirror) to the fiftieth reflecting mirror 5052. The light pulse is reflected by the three reflecting mirrors 5054 (Hengyang Optics GMH12-005-AU reflector), then reflected by the fifty-third reflecting mirror 5054 to the tenth dichroic mirror 5055 (Thorlabs DMSP1180 dichroic mirror). The light pulse is then transmitted through the tenth dichroic mirror 5055 and output. This light pulse merges with the light pulse reflected by the sixty-third reflecting mirror 5083 (Hengyang Optics GMH12-005-AU reflector) to the tenth dichroic mirror 5055 and then incident on the fourth KTiAsO4 crystal 5056. The light pulse passes through the fourth KTiAsO4 crystal 5056 (DIENTECH density 3.454 g / cm³). 3The light pulse transmitted from the KTA crystal to the eleventh dichroic mirror 5057 (Thorlabs DMSP1180 dichroic mirror) is transmitted to the fifty-fourth mirror 5058 (Hengyang Optics GMH12-005-AU dichroic mirror). The light pulse transmitted from the eleventh dichroic mirror 5057 is transmitted to the twelfth dichroic mirror 5059 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected by the twelfth dichroic mirror 5059 is transmitted to the fifty-fifth dichroic mirror. Reflector 5060 (Hengyang Optics GMH12-005-AU reflector) receives light pulses transmitted from the twelfth dichroic mirror 5059, which are then incident on the twenty-third convex lens 5061. The pulses are then transmitted through the twenty-fifth convex lens 5061 (Hengyang Optics GLH12-002-002-NIR convex lens) to the twenty-sixth convex lens 5062 (Hengyang Optics GLH12-002-002-NIR convex lens), and finally incident on the sixth grating 5063 (LightSmyth). The company's LFSSG-1000-3225-94 grating, the sixth grating 5063 reflects the light pulse to the seventh grating 5064 (LightSmyth's LFSSG-1000-3225-94 grating), the seventh grating 5064 reflects the light pulse to the second roof mirror 5065 (Hongsheng Optoelectronics HS-002103), the light pulse reaches the second roof mirror 5066 and is reflected back to the sixth grating 5063 according to the input path, the sixth grating 5063 transmits the light pulse to the fifth grating 5066. The light pulse is reflected by the sixteenth reflector 5066 (Hengyang Optics GMH12-005-AU reflector), then by the fifty-sixth reflector 5066 to the fifty-seventh reflector 5067 (Hengyang Optics GMH12-005-AU reflector), then by the fifty-eighth reflector 5068 (Hengyang Optics GMH12-005-AU reflector), and finally by the knife-edge prism 5084. The pulse is then emitted by the laser 5069 (EKSPLA APL). The light pulse pumped by the 2105 commercial picosecond Nd:YAG laser is transmitted to the thirteenth dichroic mirror 5070 (Thorlabs DMSP1180 dichroic mirror). The light pulse reflected from the thirteenth dichroic mirror 5070 passes through the eighth half-wave plate 5071 (Hengyang Optics WPZ2310-248 half-wave plate) and is incident on the second thin-film polarizer 5072 (Thorlabs LPNIRE11S). The parallel polarized light pulse transmitted through the second thin-film polarizer 5072 is incident on the fifty-ninth mirror 5105 (Hengyang Optics GMH12-005-AU mirror). The light pulse is reflected by the fifty-ninth mirror 5105 to the first dichroic mirror 5008. The vertically polarized light pulse reflected by the second thin-film polarizer 5071 is incident on the third thin-film polarizer 5073 (Thorlabs LPNIRE11S).After being reflected by the third thin-film polarizer 5072, the light pulse is transmitted through the ninth half-wave plate 5074 (Hengyang Optics WPZ2310-248 half-wave plate) and the second ytterbium-doped fiber 5075 (Nufern PM-YDF-HI ytterbium-doped fiber) to the sixtieth reflector 5076 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then reflected by the sixtieth reflector 5076 to the fourth dichroic mirror 5020. The light pulse reflected by the fourth dichroic mirror 5020 and incident through the sixty-first reflector 5019 are then transmitted to the sixth reflector 5020. The light pulses transmitted through the fourth dichroic mirror 5020 are fused together, and the fused light pulses are incident on the second KTiAsO4 crystal 5021. The light pulses output from the thirteenth dichroic mirror 5070 are transmitted through the sixty-first reflecting mirror 5077 (Hengyang Optics GMH12-005-AU reflecting mirror) to the tenth half-wave plate 5078 (Hengyang Optics WPZ2310-248 half-wave plate). The light pulses are then incident on the fourth thin-film polarizer 5079 (Thorlabs) via the tenth half-wave plate 5078. The parallel polarized light pulse transmitted through the fourth thin-film polarizer 5079 is incident on the sixty-second mirror 5106 (Hengyang Optics GMH12-005-AU mirror). The light pulse is reflected by the sixty-second mirror 5106 to the seventh dichroic mirror 5041. The vertically polarized light pulse reflected by the fourth thin-film polarizer 5079 is incident on the fifth thin-film polarizer 5080 (Thorlabs). The light pulse (LPNIRE11S) is reflected by the fifth thin-film polarizer 5080 and then transmitted through the eleventh half-wave plate 5081 (Hengyang Optics WPZ2310-248 half-wave plate) and the third ytterbium-doped fiber 5082 (Nufern PM-YDF-HI ytterbium-doped fiber) to the sixty-third reflector 5083 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then reflected by the sixty-third reflector 5083 to the tenth dichroic mirror 5055. Finally, two light pulses with the same energy and pulse duration are incident on the knife-edge prism 5084 and transmitted through the knife-edge prism 5084 to the sixty-fourth reflector 5085 (Hengyang Optics GMH12-005-AU reflector). The light pulses are reflected by the 64th reflector 5085 to the 65th reflector 5086 (Hengyang Optics GMH12-005-AU reflector), and then to the CaF2 lens 5087 (Hengyang Optics GWH51-012). The two light pulses are then merged by the CaF2 lens 5087, and the merged light pulse is incident on the fourth polarization beam splitter 5088. The light pulse is output from the output end of the fourth polarization beam splitter 5088 (Kongtum QTFBC-1216 polarization beam splitter) in the direction perpendicular to the incident direction. The light pulse is then reflected by the 66th reflector 5089 (Hengyang Optics GMH12-005-AU reflector) to the 67th reflector 5090 (Hengyang Optics GMH12-005-AU reflector).The light pulse is reflected by the 67th reflector 5090 to the 68th reflector 5091 (Hengyang Optics GMH12-005-AU reflector), then by the 68th reflector 5091 to the 69th reflector 5092 (Hengyang Optics GMH12-005-AU reflector), and then by the 69th reflector 5092 back to the fourth polarization beamsplitter 5088. The light pulse is then output from the output end of the fourth polarization beamsplitter 5088 parallel to the incident direction. After being output from the fourth polarization beamsplitter 5088, the light pulse is transmitted through the 12th half-wave plate 5093 (Hengyang Optics WPZ2310-248 half-wave plate) to the fifth polarization beamsplitter 5094 (Kongtum QTFBC-1216 polarization beamsplitter). The light pulse is then transmitted along the output end of the fifth polarization beamsplitter 5094 perpendicular to the incident direction to the 70th reflector 5095 (Hengyang Optics GMH12-005-AU reflector). The light pulse then passes through the 70th reflector... The light pulse is reflected by mirror 5095 to mirror 5096 (Hengyang Optics GMH12-005-AU mirror), then to mirror 5097 (Hengyang Optics GMH12-005-AU mirror), then to mirror 5098 (Hengyang Optics GMH12-005-AU mirror), and finally back to mirror 5094 (Fifth Polarizing Beam Splitter). The light pulse is then output from another output end parallel to the incident direction of mirror 5094. The light pulse is then transmitted through mirror 5094 to half-wave plate 5099 (Hengyang Optics WPZ2310-248 half-wave plate), then to half-wave plate 5099, and finally output from mirror 5100 (Kongtum QTFBC-1216 polarizing beam splitter). ,

[0044] The multi-channel pulse coherent superposition module performs the functions of multi-path power amplification and pulse coherent superposition.

[0045] Example 7: Pulse Width Spectrum Shaping Module

[0046] The pulse width spectrum shaping module 6 has the following optical path structure: the light pulse is incident on the third beam splitter 602 (SIGMA OBCL20-1064-R5) after passing through the second beam splitter 601 (SIGMA OBCL20-1064-R5). A portion of the light pulse after passing through the third beam splitter 602 is transmitted to the seventy-fourth reflector 603 (Hengyang Optics GMH12-005-AU reflector). After being reflected by the seventy-fourth reflector 603, the light pulse is sequentially reflected by the seventy-fifth reflector 604 (Hengyang Optics GMH12-005-AU reflector), the seventy-sixth reflector 605 (Hengyang Optics GMH12-005-AU reflector), and the seventy-seventh reflector 606 (Hengyang Optics GMH12-005-AU reflector). The light pulse reflected by the seventy-seventh reflector 606 is then incident on the eighth grating 612 (LightSmyth). The light pulse is reflected by the eighth grating 612 to the ninth grating 613 (LightSmyth LFSSG-1000-3225-94 grating). The ninth grating 613 reflects the light pulse to the seventy-eighth mirror 614 (Hengyang Optics GMH12-005-AU mirror). After reaching the seventy-eighth mirror 614, the light pulse is reflected back to the eighth grating 612 along the input path. The eighth grating 612 transmits the light pulse to the seventy-ninth mirror 615 (Hengyang Optics GMH12-005-AU mirror). The light pulse then passes through the seventy-ninth mirror 615 (Hengyang Optics GMH12-005-AU mirror). The light pulse is reflected by the 80th reflector 617 (Hengyang Optics GMH12-005-AU reflector), and then incident on the 27th convex lens 635 (Hengyang Optics GLH12-002-002-NIR convex lens). Another portion of the light pulse output from the third beam splitter 602 is transmitted to the 81st reflector 607. After being reflected by the 81st reflector 607 (Hengyang Optics GMH12-005-AU reflector), the light pulse passes sequentially through the 82nd reflector 608 (Hengyang Optics GMH12-005-AU reflector) and the 83rd reflector 609 (Hengyang Optics GMH12-005-AU reflector). The light pulses reflected by the 85th mirror 611 (610, Hengyang Optics GMH12-005-AU mirror) and the 85th mirror 611 (611, Hengyang Optics GMH12-005-AU mirror) enter the 8th grating 612 in parallel with the light pulses reflected by the 77th mirror 606. As described above, the incident path of the light pulse from the 77th mirror 606 to the 8th grating 612 passes sequentially through the 8th grating 612, the 9th grating 613, and the 78th mirror 614, and returns to the 8th grating 612 along the input path. The light pulse is then transmitted from the 8th grating 612 to the 79th mirror 615.The light pulse is reflected by the seventy-ninth reflector 615 to the eighty-sixth reflector 616, and then incident on the twenty-seventh convex lens 635 via the eighty-sixth reflector 616 (Hengyang Optics GMH12-005-AU reflector). The light pulse is then transmitted from the other output end of the second beam splitter 601 to the eighty-seventh reflector 618 (Hengyang Optics GMH12-005-AU reflector), and then transmitted to the fourth beam splitter 619 (SIGMA). The optical pulse (OBCL20-1064-R5) is partially transmitted to the 88th reflector 620 (Hengyang Optics GMH12-005-AU reflector) after passing through the fourth beam splitter 619. After reflection by the 88th reflector 620, the optical pulse is sequentially reflected by the 89th reflector 621 (Hengyang Optics GMH12-005-AU reflector), the 90th reflector 622 (Hengyang Optics GMH12-005-AU reflector), and the 91st reflector 623 (Hengyang Optics GMH12-005-AU reflector). The optical pulse reflected by the 91st reflector 623... The light pulse is incident on the tenth grating 629 (LightSmyth T-1702-1030s), which reflects it to the eleventh grating 630. The eleventh grating 630 (LightSmyth T-1702-1030s) reflects the light pulse to the ninety-second mirror 631 (Hengyang Optics GMH12-005-AU mirror). After reaching the ninety-third mirror 631, the light pulse is reflected back to the tenth grating 629 along the input path. The tenth grating 629 transmits the light pulse to the ninety-third mirror 632. The light pulse then passes through the ninety-third mirror 632. The light pulse is reflected by the 94th reflector 634 (Hengyang Optics GMH12-005-AU reflector), and then incident on the 27th convex lens 635. Another portion of the light pulse output from the fourth beam splitter 619 is transmitted to the 95th reflector 624 (Hengyang Optics GMH12-005-AU reflector). After being reflected by the 95th reflector 624, the light pulse passes sequentially through the 96th reflector 625 (Hengyang Optics GMH12-005-AU reflector) and the 97th reflector 626 (Hengyang Optics GMH12-005-AU reflector). The light pulses reflected by the ninety-ninth mirror 628 (GMH12-005-AU reflector) and the ninety-eighth mirror 627 (GMH12-005-AU reflector) enter the tenth grating 629 in parallel with the light pulses reflected by the ninety-first mirror 623. As described above, the incident path of the light pulse from the ninety-first mirror 623 to the tenth grating 629 passes through the tenth grating 629, the eleventh grating 630, and the ninety-second mirror 631 in sequence, and returns to the tenth grating 629 along the input path.The light pulse is transmitted from the tenth grating 629 to the ninety-third reflector 632. The light pulse is reflected by the ninety-fourth reflector 632 to the hundredth reflector 633, and then incident on the twenty-seventh convex lens 635. Four light pulses, passing through the eighty-sixth reflector 616, the eightieth reflector 617, the hundredth reflector 633 (Hengyang Optics GMH12-005-AU reflector), and the ninety-fourth reflector 634 respectively, enter the twenty-seventh convex lens 635 in parallel. After being focused by the twenty-seventh convex lens 635, the light pulses are merged. The merged light pulse is then reflected by the one hundred and first reflector 636 (Hengyang Optics GMH12-005-AU reflector) to the one hundred and second reflector 635. 37 (Hengyang Optics GMH12-005-AU reflector), the 102nd reflector 637 directs the light pulse onto the 14th half-wave plate 638 (Hengyang Optics WPZ2310-248 half-wave plate). The light pulse passes through the 14th half-wave plate 638, the 5th polarizing beam splitter 639 (Kongtum QTFBC-1216 polarizing beam splitter), the 28th convex lens 640 (Hengyang Optics GLH12-002-002-NIR convex lens), the 1st LBO crystal 641 (2mm thick φ=12.9°θ=90° type I phase-matched LBO crystal), and the 29th convex lens 642 (Hengyang Optics GLH12-002-002-NIR convex lens). The light pulse is then incident on the fourteenth dichroic mirror 643 (Thorlabs DMSP1180 dichroic mirror). Reflected by the fourteenth dichroic mirror 643, the light pulse reaches the one hundred and third reflecting mirror 644 (Hengyang Optics GMH12-005-AU reflecting mirror). Reflected by the one hundred and third reflecting mirror 644, the light pulse reaches the first concave mirror 645 (Hengyang Optics GMH-13 concave mirror). After passing through the first concave mirror 645, it travels through the second LBO crystal 646 (4mm thick, φ=0°θ=90°, Type I phase-matched LBO crystal) and reaches the second concave mirror 647 (Hengyang Optics GMH-13 concave mirror). Finally, it reaches the one hundred and fourth reflecting mirror 648 (Hengyang Optics G...). The light pulse is reflected by the 104th reflector 648 (Hengyang Optics GMH12-005-AU reflector) to the third concave mirror 649 (Hengyang Optics GMH-13 concave mirror). The light pulse output from the third concave mirror 649 then passes through the BBO crystal 650 (3mm thick, φ=0°θ=29.2° type I phase-matched BBO crystal) and is incident on the fourth concave mirror 651 (Hengyang Optics GMH-13 concave mirror). The light pulse is then reflected by the fourth concave mirror 651 to the 105th reflector 652 (Hengyang Optics GMH12-005-AU reflector), and finally incident on the first concave mirror 645 via the 105th reflector 562.After passing through the first concave mirror 645, the light pulse follows the path described above, passing again through the first concave mirror 645, the second LBO crystal 646, the second concave mirror 647, the 104th reflecting mirror 648, the third concave mirror 649, the BBO crystal 650, and the fourth concave mirror 651. After multiple reflections, the light pulse returns to the fourth concave mirror 651, and is then transmitted through the fourth concave mirror 651 to the 30th convex lens 653 (Hengyang Optics GLH12-002-002-NIR convex lens), where it is output.

[0047] The pulse width spectral shaping module further compresses the pulse width and uses a nonlinear frequency conversion structure to achieve 330nm pulse output.

[0048] Example 7: Working principle of the present invention

[0049] The working principle of the present invention will be explained in conjunction with the above embodiments and accompanying drawings.

[0050] The seed pulse source module 1 employs a spatial light modulator to design a programmable pulse shaping structure for high-order dispersion management within the fiber laser cavity. The first polarizer 120, first polarization controller 121, second polarization controller 122, and second polarizer 123 are connected via polarization-maintaining fiber to form a multi-peak, high-order tunable filter, enabling the fiber laser cavity output to produce high-energy pure fourth-order soliton pulses unrestricted by soliton area theory. The spectral narrowing module and multi-channel pulse time-domain segmentation module achieve spectral width compression and power pre-amplification. The combination of the third grating 202, fourth mirror 203, fifth mirror 204, third convex lens 205, and sixth mirror 206 compresses the width of the optical pulse spectrum. The acousto-optic modulator 302 reduces the pulse repetition frequency to generate higher peak power high-energy pulses throughout the structure. The high-order dispersion control structure, composed of the second spatial light modulator 407 and the tilted chirped Bragg grating 408, pre-compensates for the accumulated nonlinear phase shift in the system, compressing the pulse width. The multi-channel pulse coherent superposition module 5 uses multi-channel multiplexing technology to perform time-division duplication of the power-adjusted optical pulses. Finally, the pulse width spectrum shaping module 6 further compresses the pulses and uses a combination of nonlinear crystal barium metaborate and lithium triborate to perform nonlinear frequency conversion, thereby obtaining an ultra-short pulse output of 330nm.

Claims

1. An ultrashort pulse fiber laser system based on dispersion modulation technology, the structure of which is as follows: the output end of the seed pulse source (1) is connected to the input end of the spectral narrowing module (2), the output end of the spectral narrowing module (2) is connected to the input end of the multi-channel pulse time domain segmentation module (3), the output end of the multi-channel pulse time domain segmentation module (3) is connected to the input end of the pulse shaping module (4), the output end of the pulse shaping module (4) is connected to the input end of the multi-channel pulse coherence superposition module (5), and the output end of the multi-channel pulse coherence superposition module (5) is connected to the input end of the pulse width spectral shaping module (6); The seed pulse source (1) has the following structure: the pump source (101) is connected to the 980nm end of the wavelength division multiplexer (102), and the 1060nm end of the wavelength division multiplexer (102) is connected to the input end of the first collimator (104) through the first ytterbium-doped fiber (103). After the light pulse passes through the first collimator (104), the first quarter-wave plate (105), the first half-wave plate (106), the first polarization beam splitter (107), the first isolator (108), the second quarter-wave plate (109), the second collimator (110), and the third collimator (111), the light pulse is incident on the first reflector (112) through the third collimator (111). The first reflector (112) reflects the light pulse onto the first grating (113). The light pulse output by the first grating (113) passes through the first convex lens (114) and the first spatial light... After passing through the modulator (115) and the second convex lens (116), the light pulse is transmitted to the second grating (117). The second grating (117) reflects the light pulse to the second mirror (118), and then to the fourth collimator (119). The fourth collimator (119) is connected to the input of the first polarizer (120). The output of the first polarizer (120) is connected to the input of the first polarization controller (121) through a polarization-maintaining fiber. The output of the first polarization controller (121) is connected to the input of the second polarization controller (122) through a polarization-maintaining fiber. The output of the second polarization controller (122) is connected to the input of the second polarizer (123) through a polarization-maintaining fiber. The output of the second polarizer (122) is connected to the common terminal of the wavelength division multiplexer (102). The light pulse is output from the output terminal of the first polarization beam splitter (107) perpendicular to the incident direction. The spectral narrowing module (2) has the following optical path structure: the light pulse is transmitted to the third grating (202) via the third reflector (201), the third grating (202) transmits the light pulse to the fourth reflector (203), and then reflects it to the fifth reflector (204). The fifth reflector (204) reflects the light pulse back to the third grating (202). The pulse output by the third grating (202) is transmitted to the sixth reflector (206) via the third convex lens (205), and then reflected back to the third grating (202) via the third convex lens (205). The light pulse is then transmitted to the fourth reflector (203) via the third grating (202). The fourth reflector (203) reflects the light pulse and then the fifth reflector (204) reflects it back to the third grating (202). The light pulse output from the third grating (202) is then reflected back to the third grating (202) by the Pollo prism (207). After passing through the third grating (202), the light pulse follows the same optical path again through the fourth reflector (203), the fifth reflector (204), the first grating (202), the third convex lens (205), the sixth reflector (206), and the Pollo prism (207) before returning to the third grating (202). The light pulse is then output through the third grating (202). The multi-channel pulse time-domain segmentation module (3) has the following optical path structure: the light pulse is incident on the third convex lens (301), and after passing through the fourth convex lens (301), the acousto-optic modulator (302), and the fifth convex lens (303), the light pulse is incident on the seventh reflector (304) through the fifth convex lens (303). The light pulse pumped by the first laser diode (321) passes through the third half-wave plate (322) and the seventh convex lens (323) and pumps the first Nd:YVO4 crystal (305) from the side. The light pulse is reflected by the seventh reflector (304) to the first Nd:YVO4 crystal (305). The light pulse is transmitted through the first Nd:YVO4 crystal (305) to the eighth reflector (306). 06) The reflected light pulse passes through the second isolator (307) and the sixth convex lens (308) and is then incident on the ninth reflector (309). The light pulse reflected by the ninth reflector (309) passes through the second half-wave plate (310) and is then incident on the tenth reflector (311). The light pulse is reflected by the tenth reflector (311) to the first Nd:YVO4 crystal (305), and then transmitted through the first Nd:YVO4 crystal (305) to the eleventh reflector (312). The light pulse is transmitted through the eleventh reflector (312) to the third isolator (313). The light pulse transmitted through the third isolator (313) passes through the eighth convex lens (314) and is then incident on the twelfth reflector (315). The light pulse is then transmitted through the twelfth reflector (315) to the twelfth reflector (315). The light pulse is reflected by the ninth convex lens (316), and then incident on the thirteenth mirror (317). The light pulse is reflected by the thirteenth mirror (317) and then transmitted through the tenth convex lens (318) and the eleventh convex lens (319) to the fourteenth mirror (320). The light pulse is reflected by the fourteenth mirror (320) to the second Nd:YVO4 crystal (324). The pump light generated by the second laser diode (328) passes through the fourth half-wave plate (327) and the twelfth convex lens (326) and pumps the second Nd:YVO4 crystal (324) from the side. The light pulse output by the second Nd:YVO4 crystal (324) is incident on the fifteenth mirror (325). The light pulse is reflected to the sixteenth mirror (329), and then incident on the input end of the second polarizing beam splitter (331) via the fifth half-wave plate (330). The light pulse is transmitted from the output end of the second polarizing beam splitter (331) perpendicular to the incident direction through the third quarter-wave plate (332) to the seventeenth mirror (333). The seventeenth mirror (333) reflects the light pulse back to the third quarter-wave plate (332), and the third quarter-wave plate (332) transmits the light pulse to the second polarizing beam splitter (331) again. At the same time, the light pulse is transmitted from another port of the second polarizing beam splitter (331) perpendicular to the incident direction through the fourth quarter-wave plate (334) to the eighteenth mirror (335) and the first piezoelectric actuator (336).The light pulse is reflected back to the fourth quarter-wave plate (334) by the eighteenth mirror (335). The fourth quarter-wave plate (334) then transmits the light pulse back to the second polarization beam splitter (331). The light pulse is output from the port of the second polarization beam splitter (331) parallel to the incident direction and transmitted to the third polarization beam splitter (338) via the sixth half-wave plate (337). The light pulse is transmitted from the port of the third polarization beam splitter (338) perpendicular to the incident direction via the fifth quarter-wave plate (339) to the nineteenth mirror (340). The nineteenth mirror (340) reflects the light pulse back to the fifth quarter-wave plate (339). The fifth quarter-wave plate (339) transmits the light pulse back to the third polarization beamsplitter (338). Simultaneously, the light pulse travels from the port of the third polarization beamsplitter (338) perpendicular to the incident direction via the sixth quarter-wave plate (341) to the twentieth mirror (342) and the second piezoelectric actuator (343). The light pulse is then reflected back to the sixth quarter-wave plate (341) by the twentieth mirror (342), and the sixth quarter-wave plate (341) transmits the light pulse back to the third polarization beamsplitter (338). The light pulse is then output from the output end of the third polarization beamsplitter (338) parallel to the incident direction. The pulse shaping module (4) has the following optical path structure: the light pulse is incident on the tilted chirped Bragg grating (408) through the thirteenth convex lens (401) and the fourteenth convex lens (402). The long-wavelength component of the light pulse is transmitted from the back of the tilted chirped Bragg grating (408) to the twenty-first reflector (406). After being reflected by the twenty-first reflector (406), the light pulse is transmitted to the second spatial light modulator (407) and then incident from the second spatial light modulator (407) to the twenty-first reflector (406). The twenty-first reflector (406) reflects the light pulse. The light pulse returns to the tilted chirped Bragg grating (408), and the light pulse is fused with the short-wave component reflected from the front surface of the tilted chirped Bragg grating (408) after it is previously incident on the tilted chirped Bragg grating (408). The light pulse is transmitted through the seventh half-wave plate (405) to the first thin-film polarizer (404). The light pulse is split into a main light pulse and a rejection light pulse by the first thin-film polarizer (404). The rejection light pulse is transmitted through the first thin-film polarizer (404) to the beam cutoff (403). The main light pulse is reflected by the first thin-film polarizer (404) to the wedge beam splitter (409) and then output through the wedge beam splitter (409). The multi-channel pulse coherent superposition module (5) has the following optical path structure: the light pulse is incident on the input end of the first beam splitter (5001), and is transmitted from the output end of the first beam splitter (5001) to the twenty-second reflector (5002). The light pulse is reflected by the twenty-second reflector (5002) to the twenty-third reflector (5003), and then reflected by the twenty-third reflector (5003) to the twenty-fourth reflector (5004). The twenty-fourth reflector (5004) reflects the light pulse to the twenty-fifth reflector (5005). The light pulse is reflected by the twenty-fifth reflector (5005) to the fifteenth convex lens (5006). The light pulse passes through the fifteenth convex lens (5006), the sixteenth convex lens (5007), and the first dichromatic lens. After passing through mirror (5008), the light pulse is transmitted and output through the first dichroic mirror (5008). The light pulse is then fused with the light pulse reflected by the fifty-ninth mirror (5105) to the first dichroic mirror (5008) and then reflected and output. The fused light pulse is transmitted through the first dichroic mirror (5008) to the first KTiAsO4 crystal (5009). The light pulse is then transmitted through the first KTiAsO4 crystal (5009) to the second dichroic mirror (5010). The short-wavelength light pulse reflected from the second dichroic mirror (5010) is transmitted to the twenty-sixth mirror (5101), and the long-wavelength light pulse transmitted from the second dichroic mirror (5010) is transmitted to the third dichroic mirror (5011). The light pulse reflected from the third dichroic mirror (5011) is transmitted to the twenty-seventh mirror (5011). (5102) The light pulse transmitted from the third dichroic mirror (5011) is incident on the twenty-eighth reflecting mirror (5012). The light pulse is reflected by the twenty-eighth reflecting mirror (5012) to the twenty-ninth reflecting mirror (5013), and then reflected by the twenty-ninth reflecting mirror (5013) to the seventeenth convex lens (5014). It is then transmitted through the seventeenth convex lens (5014) to the eighteenth convex lens (5015), and after passing through the eighteenth convex lens (5015), it is incident on the thirtieth reflecting mirror (5016). The light pulse is reflected by the thirtieth reflecting mirror (5016) to the thirty-first reflecting mirror (5017), and then reflected by the thirty-first reflecting mirror (5017) to the thirty-second reflecting mirror (5018). Finally, it is reflected by the thirty-second reflecting mirror (5018) to the third... The light pulse is transmitted through the thirteenth mirror (5019) to the fourth dichroic mirror (5020), then through the fourth dichroic mirror (5020) to the second KTiAsO4 crystal (5021). The light pulse is then transmitted through the second KTiAsO4 crystal (5021) to the fifth dichroic mirror (5022). The light pulse reflected from the fifth dichroic mirror (5022) is transmitted to the thirty-fourth mirror (5103). The light pulse transmitted from the fifth dichroic mirror (5022) is transmitted to the sixth dichroic mirror (5023). The light pulse reflected from the sixth dichroic mirror (5023) is transmitted to the thirty-fifth mirror (5104). The light pulse transmitted from the sixth dichroic mirror (5023) is incident on the nineteenth convex lens (5024).The light pulse is transmitted through the nineteenth convex lens (5024) to the twentieth convex lens (5025), and then incident on the fourth grating (5027) through the twentieth convex lens (5025). The fourth grating (5027) reflects the light pulse to the fifth grating (5028), which in turn reflects it to the first roof mirror (5029). After reaching the first roof mirror (5029), the light pulse is reflected back to the fourth grating (5027) along the input path. The fourth grating (5027) transmits the light pulse to the thirty-sixth reflector (5026), which then reflects it to the thirty-seventh reflector (5030). After being reflected by the thirty-seventh reflector (5030), the light pulse is reflected to the thirty-eighth reflector (5031). The light pulse is reflected by the thirty-eighth reflector (5031) to the thirty-ninth reflector (5032), then by the thirty-ninth reflector (5032) to the fortieth reflector (5033), and then by the fortieth reflector (5033) to the knife-edge prism (5084). It is then transmitted from the other output end of the first beam splitter (5001) to the forty-first reflector (5034). The light pulse is reflected by the forty-first reflector (5034) to the forty-second reflector (5035), then by the forty-second reflector (5035) to the forty-third reflector (5036), then by the forty-third reflector (5036) to the forty-fourth reflector (5037), and finally by the forty-fourth reflector (5037) to the forty-fifth reflector (5038). The light pulse is reflected by the forty-fifth mirror (5038) to the twenty-first convex lens (5039). After passing through the twenty-first convex lens (5039) and the twenty-second convex lens (5040), the light pulse is reflected by the twenty-second convex lens (5040) to the seventh dichroic mirror (5041). After being transmitted through the seventh dichroic mirror (5041), the light pulse merges with the light pulse reflected from the seventh dichroic mirror (5041) after being incident along the sixty-second mirror (5106). The merged light pulse is incident through the seventh dichroic mirror (5041) to the third KTiAsO4 crystal (5042). The light pulse is transmitted through the third KTiAsO4 crystal (5042) to the eighth dichroic mirror (5043). The light pulse reflected from the eighth dichroic mirror (5043) is then... The light pulse is reflected to the forty-sixth mirror (5044), and transmitted from the eighth dichroic mirror (5043) to the ninth dichroic mirror (5045). The light pulse reflected by the ninth dichroic mirror (5045) is transmitted to the forty-seventh mirror (5046). The light pulse output from the ninth dichroic mirror (5045) is incident on the forty-seventh mirror (5046). The light pulse transmitted by the ninth dichroic mirror (5045) is incident on the forty-eighth mirror (5047). The light pulse is reflected by the forty-eighth mirror (5047) to the forty-ninth mirror (5048). The light pulse is reflected by the forty-ninth mirror (5048) to the twenty-third convex lens (5049). After passing through the twenty-third convex lens (5049) and the twenty-fourth convex lens (5050), the light pulse is reflected to the forty-sixth mirror (5044).The light pulse is incident on the fiftieth reflecting mirror (5051), reflected by the fiftieth reflecting mirror (5051) to the fifty-first reflecting mirror (5052), reflected by the fifty-first reflecting mirror (5052) to the fifty-second reflecting mirror (5053), reflected by the fifty-second reflecting mirror (5053) to the fifty-third reflecting mirror (5054), reflected by the fifty-third reflecting mirror (5054) to the tenth dichroic mirror (5055), and transmitted out through the tenth dichroic mirror (5055). The light pulse merges with the light pulse reflected by the sixty-third reflecting mirror (5083) to the tenth dichroic mirror (5055) and then reflected out, and is incident on the fourth KTiAsO4 crystal (5056). The light pulse is transmitted through the fourth KTiAsO4 crystal (5056) The light pulse is transmitted to the eleventh dichroic mirror (5057), and the light pulse reflected from the eleventh dichroic mirror (5057) is transmitted to the fifty-fourth mirror (5058). The light pulse transmitted from the eleventh dichroic mirror (5057) is transmitted to the twelfth dichroic mirror (5059), and the light pulse reflected by the twelfth dichroic mirror (5059) is transmitted to the fifty-fifth mirror (5060). The light pulse transmitted from the twelfth dichroic mirror (5059) is incident on the twenty-fifth convex lens (5061), and transmitted through the twenty-fifth convex lens (5061) to the twenty-sixth convex lens (5062). The light pulse is incident on the sixth grating (5063) through the twenty-sixth convex lens (5062), and the sixth grating (5063) reflects the light pulse to the seventh grating (5064). On the first mirror, the seventh grating (5064) reflects the light pulse to the second roof mirror (5065). After reaching the second roof mirror (5066), the light pulse is reflected back to the sixth grating (5063) along the input path. The sixth grating (5063) transmits the light pulse to the fifty-sixth mirror (5066). The light pulse is reflected by the fifty-sixth mirror (5066) to the fifty-seventh mirror (5067), and then by the fifty-seventh mirror (5067) to the fifty-eighth mirror (5068). The fifty-eighth mirror (5068) reflects the light pulse to the knife-edge prism (5084). The light pulse pumped by the laser (5069) is transmitted to the thirteenth dichroic mirror (5070). The light pulse is reflected from the thirteenth dichroic mirror (5070) to the second roof mirror (5065). The emitted light pulse passes through the eighth half-wave plate (5071) and is incident on the second thin-film polarizer (5072). The parallel polarized light pulse transmitted through the second thin-film polarizer (5072) is incident on the fifty-ninth mirror (5105). The light pulse is reflected by the fifty-ninth mirror (5105) to the first dichroic mirror (5008). The vertically polarized light pulse reflected by the second thin-film polarizer (5071) is incident on the third thin-film polarizer (5073). After being reflected by the third thin-film polarizer (5072), the light pulse passes through the ninth half-wave plate (5074) and the second ytterbium-doped fiber (5075) and is transmitted to the sixtieth mirror (5076). The light pulse is reflected by the sixtieth mirror (5076) to the fourth dichroic mirror (5020).The light pulse reflected by the fourth dichroic mirror (5020) merges with the light pulse that is incident on the fourth dichroic mirror (5020) through the thirty-third mirror (5019) and then transmitted out through the fourth dichroic mirror (5020). The merged light pulse is incident on the second KTiAsO4 crystal (5021). The light pulse output from the thirteenth dichroic mirror (5070) is transmitted to the tenth half-wave plate (5078) through the sixty-first mirror (5077). The light pulse is incident on the fourth thin-film polarizer (5079) through the tenth half-wave plate (5078). The parallel polarized light pulse transmitted out through the fourth thin-film polarizer (5079) is incident on the sixty-second mirror (5106). The light pulse is reflected by the sixty-second mirror (5106) to the seventh dichroic mirror. (5041) A vertically polarized light pulse reflected by the fourth thin-film polarizer (5079) is incident on the fifth thin-film polarizer (5080). After being reflected by the fifth thin-film polarizer (5080), the light pulse is transmitted through the eleventh half-wave plate (5081) and the third ytterbium-doped fiber (5082) to the sixty-third mirror (5083). The light pulse is reflected by the sixty-third mirror (5083) to the tenth dichroic mirror (5055). Finally, two light pulses with the same energy and pulse duration are incident on the knife-edge prism (5084). The light pulse is transmitted through the knife-edge prism (5084) to the sixty-fourth mirror (5085). The light pulse is reflected by the sixty-fourth mirror (5085) to the sixty-fifth mirror (5086) and then to Ca. Two light pulses are fused through an F2 lens (5087). The fused light pulse is then incident on the fourth polarization beam splitter (5088). The light pulse is output from the output end of the fourth polarization beam splitter (5088) perpendicular to the incident direction. The light pulse is reflected by the sixty-sixth mirror (5089) to the sixty-seventh mirror (5090), then by the sixty-seventh mirror (5090) to the sixty-eighth mirror (5091), then by the sixty-eighth mirror (5091) to the sixty-ninth mirror (5092), and finally by the sixty-ninth mirror (5092) back to the fourth polarization beam splitter (5088). The light pulse is then output from the output end of the fourth polarization beam splitter (5088) parallel to the incident direction. After being output from polarization beamsplitter (5088), the light pulse is transmitted through the twelfth half-wave plate (5093) to the fifth polarization beamsplitter (5094). The light pulse is transmitted along the output end of the fifth polarization beamsplitter (5094) perpendicular to the incident direction to the seventieth mirror (5095). The light pulse is reflected by the seventieth mirror (5095) to the seventy-first mirror (5096), then by the seventy-first mirror (5096) to the seventy-second mirror (5097), then by the seventy-second mirror (5097) to the seventy-third mirror (5098), and finally by the seventy-third mirror (5098) back to the fifth polarization beamsplitter (5094). The light pulse is then output through another output end parallel to the incident direction of the fifth polarization beamsplitter (5094).The optical pulse is transmitted via the fifth polarization beamsplitter (5094) to the thirteenth half-wave plate (5099), then via the thirteenth half-wave plate (5099) to the sixth polarization beamsplitter (5100), and finally output by the sixth polarization beamsplitter (5100). The pulse width spectrum shaping module 6 has the following optical path structure: the light pulse is incident on the third beam splitter (602) after passing through the second beam splitter (601). Part of the light pulse after passing through the third beam splitter (602) is transmitted to the seventy-fourth reflector (603). After being reflected by the seventy-fourth reflector (603), the light pulse is reflected in sequence by the seventy-fifth reflector (604), the seventy-sixth reflector (605), and the seventy-seventh reflector (606). The light pulse reflected by the seventy-seventh reflector (606) is incident on the eighth grating (612). The eighth grating (612) reflects the light pulse to the ninth grating (613). The ninth grating (613) reflects the light pulse to the seventy-eighth reflector (614). After reaching the seventy-eighth reflector (614), the light pulse is reflected back according to the input path. The light pulse is transmitted to the eighth grating (612), which transmits it to the seventy-ninth mirror (615). The light pulse is reflected by the seventy-ninth mirror (615) to the seventy-ninth mirror (617), and then incident on the twenty-seventh convex lens (635) via the eightieth mirror (617). Another part of the light pulse output from the third beam splitter (602) is transmitted to the eighty-first mirror (607). After being reflected by the eighty-first mirror (607), the light pulse passes sequentially through the eighty-second mirror (608), the eighty-third mirror (609), the eighty-fourth mirror (610), and the eighty-fifth mirror (611). The light pulse reflected by the eighty-fifth mirror (611) enters the eighth grating (612) in parallel with the light pulse reflected by the seventy-seventh mirror (606). As described above, the incident path of the light pulse from the seventy-seventh reflector (606) to the eighth grating (612) passes sequentially through the eighth grating (612), the ninth grating (613), and the seventy-eighth reflector (614) and returns to the eighth grating (612) along the input path. The light pulse is transmitted from the eighth grating (612) to the seventy-ninth reflector (615), and the light pulse is reflected by the seventy-ninth reflector (615) to the eighty-sixth reflector (616). The light pulse is then incident on the twenty-seventh convex lens (635) through the eighty-sixth reflector (616), and the light pulse is transmitted from the other output end of the second beam splitter (601) to the eighty-seventh reflector (618). The light pulse is transmitted to the fourth beam splitter (619) via the eighty-seventh mirror (618). Part of the light pulse transmitted through the fourth beam splitter (619) is transmitted to the eighty-eighth mirror (620). After being reflected by the eighty-eighth mirror (620), the light pulse is reflected in sequence by the eighty-ninth mirror (621), the ninetieth mirror (622), and the ninety-first mirror (623). The light pulse reflected by the ninety-first mirror (623) is incident on the tenth grating (629). The tenth grating (629) reflects the light pulse to the eleventh grating (630). The eleventh grating (630) reflects the light pulse to the ninety-second mirror (631).After the light pulse reaches the 92nd reflector (631), it is reflected back to the 10th grating (629) along the input path. The 10th grating (629) transmits the light pulse to the 93rd reflector (632). The light pulse is reflected by the 93rd reflector (632) to the 94th reflector (634). It is then incident on the 27th convex lens (635) through the 94th reflector (634). Another part of the light pulse output from the fourth beam splitter (619) is transmitted to the 95th reflector (624). After being reflected by the 95th reflector (624), the light pulse passes through the 96th reflector (625), the 97th reflector (626), the 98th reflector (627), and the 99th reflector (628) in sequence. The light pulse reflected by the 100th reflector (628) and the light pulse reflected by the 91st reflector (623) enter the 10th grating (629) in parallel. As described above, the incident path of the light pulse from the ninety-first reflector (623) to the tenth grating (629) passes sequentially through the tenth grating (629), the eleventh grating (630), and the ninety-second reflector (631), and returns to the tenth grating (629) along the input path. The light pulse is transmitted from the tenth grating (629) to the ninety-third reflector (632), and is reflected by the ninety-third reflector (632) to the one hundredth reflector (633). The light pulse is then incident on the twenty-seventh convex grating via the one hundredth reflector (633). Lens (635) receives four light pulses that pass through the eighty-sixth mirror (616), the eightieth mirror (617), the one hundredth mirror (633), and the ninety-fourth mirror (634), respectively, and enter the twenty-seventh convex lens (635) in parallel. After being focused by the twenty-seventh convex lens (635), the light pulses are fused. The fused light pulse is then reflected by the one hundred and one hundred mirror (636) to the one hundred and two mirror (637). The one hundred and two mirror (637) directs the light pulse onto the fourteenth half-wave plate (638). The light pulse passes through the fourteenth half-wave plate (638), the sixth polarizing beam splitter (639), the twenty-eighth convex lens (640), the first LBO crystal (641), and the twenty-ninth convex lens (642) before being incident on the thirteenth dichroic mirror (643). The light pulse is reflected by the thirteenth dichroic mirror (643) to the one hundred and third reflecting mirror (644), and then reflected by the one hundred and third reflecting mirror (644) to the first concave mirror (645). After passing through the first concave mirror (645) and the second LBO crystal (646), the light pulse enters the second LBO crystal. The light pulse is emitted to the second concave mirror (647), then incident on the first 104th reflecting mirror (648) through the second concave mirror (647), and reflected by the first 104th reflecting mirror (648) to the third concave mirror (649). The light pulse output by the third concave mirror (649) passes through the BBO crystal (650) and is incident on the fourth concave mirror (651). The light pulse is reflected by the fourth concave mirror (651) to the first 105th reflecting mirror (652), and then incident on the first concave mirror (645) through the first 105th reflecting mirror (652).After passing through the first concave mirror (645), the light pulse follows the same optical path again, passing through the second LBO crystal (646), the second concave mirror (647), the 104th reflector (648), the third concave mirror (649), the BBO crystal (650), and the fourth concave mirror (651). The light pulse is then transmitted through the fourth concave mirror (651) to the 30th convex lens (653), at which point the light pulse is output.

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