Research progress and prospects of laser diode pumped high-energy laser
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摘要: 高能激光广泛应用于材料加工、科学研究、空间碎片清除、军事应用等领域。二极管泵浦高能激光具有结构紧凑,系统简单、全电驱无限弹仓的特点,近年来,各类二极管泵浦高能激光围绕着同时实现高功率、高效率、高光束质量这一总目标发展迅速。详细综述了国内外高平均功率块状固体激光、高功率可见光波段激光、高峰值功率激光、高功率光纤激光、碱金属蒸气激光等二极管泵浦高能激光的研究进展,并对其发展趋势进行了展望。
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关键词:
- 二极管泵浦高能激光 /
- 高平均功率块状固体激光器 /
- 高平均功率光纤激光器 /
- 碱金属蒸气激光器 /
- 高功率绿光激光器 /
- 高峰值功率脉冲激光器
Abstract: High-energy lasers are widely used in materials processing, scientific research, space debris removal, and military counter measures. In recent years, various types of diode-pumped high-energy lasers with high power, high efficiency, and high beam quality have been rapidly developed due to their compact structure, simple system, full electric drive, and unlimited magazines. In this review, we describe in detail the research progress of high-average power bulk solid-state lasers, high-power visible light lasers, high-peak power lasers, high-power fiber lasers, alkali metal vapor lasers and other diode-pumped high-energy lasers at home and abroad. Moreover, we conclude with some perspectives and outlook on their future developments. -
图 10 中国科学院单纤10.14 kW激光输出实验结构图[28]
Figure 10. Diagram of experimental setup of laser system of SIOM of CAS
图 11 麻省理工学院基于伪随机编码信号调制实现 3.1 kW 窄线宽线偏振光纤激光结构示意图[41]
Figure 11. Experimental setup of 3.1 kW narrow linewidth fiber amplifier based on PRBS phase-modulated seed of MIT
图 12 中国工程物理研究院基于白噪声相位调制实现3.25 kW 窄线宽光纤激光实验结构[43]
Figure 12. Scheme of the 3.25 kW all-fiber PM amplifier based on WNS phase-modulated seed of CAEP
图 13 中国工程物理研究院基于白噪声相位调制实现3.25 kW 窄线宽光纤激光实验结果[43]
Figure 13. Experiments results of the 3.25 kW all-fiber PM amplifier based on WNS phase-modulated seed of CAEP
图 14 林肯实验室光纤激光相干合成实验系统[44]
Figure 14. Experimental setup of fiber laser combining system of Lincoln Laboratory
图 15 美国空军实验室基于DOE的共孔径相干合成系统[45]
Figure 15. Schematic of DOE common aperture coherent combining system of AFRL
图 16 洛克希德·马丁公司30 kW光谱合成输出光谱图[46]
Figure 16. Spectrum of the SBC output beam at 30 kW of Lockheed Martin
表 1 通用原子浸入式直接液冷激光光源的功率、体积、重量等参数对比
Table 1. Comparison of parameters about direct liquid cooling laser
generation power/kW weight power ratio /(W·kg−1) volume power ratio/(kW·m−3) first 150(synthesis) 200 50 second 100(single) 285 100 third 75(single) 250 280 fourth 122(single) 333 356 表 2 钾、铷、铯蒸气激光器相关参数
Table 2. Parameters of potassium, rubidium and cesium vapor lasers
element atomic
weightmelting
point/℃boiling
point/℃D2 line/nm D1 line/nm ΔE/cm−1 D2 Doppler
linewidth (373 K) /nmK 39.0983 63.65 770 766.70 770.11 57.7 0.00164 Rb 85.4678 38.89 688 780.25 794.98 237.5 0.00116 Cs 132.9054 28.84 678 852.35 894.59 554.1 0.00102 element He 2P mixing
rate/
(104 s−1·Pa−1)He 2P3/2 broading
rate/
(10−5 nm·Pa)He 2P1/2 broading
rate/
(10−5 nm·Pa)quantum
efficiency/%energy
level
lifetime/nsspontaneous
emission
rate/(106 s−1)K 8.0 0.034 0.026 99.56 26.7(D1)/26.3(D2) Rb 0.044 0.044 0.036 98.1 27.7(D1)/26.2(D2) 36.1(D1)/38.1(D2) Cs 0.0005 0.072 0.069 95.3 ≈30.5 -
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