大口径倒腔式等离子体开关

大口径倒腔式等离子体开关是神光Ⅱ升级装置倒腔式多程放大方案的关键单元，该方案要求等离子体开关能够在极短的时间内完成工作状态的转换。采用正负开关脉冲驱动的等离子体开关响应时间较长，无法满足装置的使用要求。基于Blumlein脉冲形成线结构的高压低阻抗开关脉冲发生器能够实现倍压输出，使单一脉冲驱动等离子体开关成为可能，从而大幅减小开关响应时间。单一脉冲驱动的350 mm×350 mm口径倒腔式等离子体开关理论充电时间约为54 ns，其开关响应时间可做到小于90 ns。实验测得的等离子体开关全口径开关效率大于99.7%，静态消光比大于381，时间窗口顶宽大于160 ns，底宽小于400 ns，上述指标均满足神光II升级装置的使用要求。

Abstract

Large aperture plasma electrode Pockels cell (PEPC) is the key unit of the multi-pass amplified scheme of SGⅡ upgrading laser. The PEPC in this scheme should achieve the status switching between on and off in a very short time. The response time of the PEPC driven by positive-negative switching pulses is not as short as the demand of the multi-pass amplified scheme. In the single-pulse process, the low-impedance high voltage generator based on Blumlein pulse-forming line is used to drive the PEPC, and the response time can be reduced greatly. The theoretical charge time of the plasma switch with 350 mm×350 mm aperture is about 54 ns, and the response time can be less than 90 ns in single-pulse process. The experimental results of the switching efficiency of full aperture are higher than 99.7%. The extinction rate exceeds 381. The top width of the time window is larger than 160 ns, and the bottom width is less than 400 ns. All these experimental results can meet the specification of SGⅡ upgrading laser.

参考文献

[1] J. Goldhar, M. A. Henesian. Electro-optical switches with plasma electrodes［J］. Opt. Lett., 1984, 9(3): 73～75

[2] M. A. Rhodes, B. Woods, J. J. DeYoreo et al.. Performance of large-aperture optical switches for high-energy ICF lasers［J］. Appl. Opt., 1995, 34(24): 5312～5325

[3] C. D. Boley, M. A. Rhodes. Modeling of plasma behavior in a plasma electrode Pockels cell［J］. IEEE Transactions on Plasma Science, 1999, 27(3): 713～726

[4] J. Gardelle, E. Pasini. A simple operation of a plasma-electrode Pockels cell for the laser megajoules［J］. J. Appl. Phys., 2002, 91(5): 2631～2636

[5] 吴登生, 张雄军, 郑建刚等. 400 mm×400 mm口径单脉冲普克尔盒时间特性研究［J］. 中国激光, 2010, 37(5): 1227～1230

Wu Dengsheng, Zhang Xiongjun, Zheng Jiangang et al.. Study on temporal behaviour of one-pulse-process plasma electrodes Pockels cell with 400 mm×400 mm aperture［J］. Chinese J. Lasers, 2010, 37(5): 1227～1230

[6] 吴登生, 张雄军, 郑奎兴等. 低抖动小漂移开关脉冲发生器研究［J］. 强激光与离子束, 2005, 17(9): 1286～1288

Wu Dengsheng, Zhang Xiongjun, Zheng Kuixing et al.. Study of low jitter and small drift switch pulse generator［J］. High Power Laser and Particle Beams, 2005, 17(9): 1286～1288

[7] Xiongjun Zhang, Dengsheng Wu, Jun Zhang et al.. One-pulse driven plasma Pockels cell with DKDP crystal for repetition-rate application［J］. Opt. Express, 2009, 17(19): 17164～17169

[8] 张雄军, 吴登生, 郑奎兴等. 280 mm×280 mm口径单脉冲过程电光开关［J］. 光学学报, 2006, 26(2): 254～258

Zhang Xiongjun, Wu Dengsheng, Zheng Kuixing et al.. Electro-optical switch with 280 mm×280 mm aperture drived by one-pulse process［J］. Acta Optica Sinica, 2006, 26(2): 254～258

[9] 张雄军, 冯国英, 郑奎兴等. 等离子体电极普克尔盒的并联驱动［J］. 中国激光, 2004, 31(10): 1173～1176

Zhang Xiongjun, Feng Guoying, Zheng Kuixing et al.. Parallel driving to plasma electrode Pockels cells［J］. Chinese J. Lasers, 2004, 31(10): 1173～1176

[10] 张雄军, 郑奎兴, 吴登生等. 等离子体电极普克尔盒退偏损耗分析［J］. 中国激光, 2004, 31(增刊): 384～386

Zhang Xiongjun, Zheng Kuixing, Wu Dengsheng et al.. Analyses on depolarization losses of plasma-electrode Pockels cell［J］. Chinese J. Lasers, 2004, 31(suppl.): 384～386

[11] 郭文琼, 周晓军, 张雄军等. 等离子体电极普克尔盒电光开关单脉冲过程数值模拟［J］. 物理学报, 2006, 55(7): 3519～3523

Guo Wenqiong, Zhou Xiaojun, Zhang Xiongjun et al.. Simulation electro-optic switch of plasma-electrode Pockels cells driven by one-pulse process［J］. Acta Physica Sinica, 2006, 55(7): 3519～3523

[12] 郭文琼, 张雄军, 周晓军等. 氦气压强对单脉冲过程电光开关特性影响的数值分析［J］. 光学学报, 2007, 27(4): 695～700

Guo Wenqiong, Zhang Xiongjun, Zhou Xiaojun et al.. Numerical analysis of helium-pressure influence on characteristics of electro-optic switch driven by single-pulse process［J］. Acta Optica Sinica, 2007, 27(4): 695～700

[13] 张雄军, 吴登生, 鲁敬平等. 高平均功率热补偿电光开关［J］. 激光与光电子学进展, 2005, 42(10): 36～40

Zhang Xiongjun, Wu Dengsheng, Lu Jingping et al.. High average power electro-optical switches with thermal compensation［J］. Laser & Optoelectronics Progress, 2005, 42(10): 36～40

[14] 张君, 张雄军, 魏晓峰等. 重频应用下等离子体电光开关热退偏损耗分析［J］. 强激光与离子束, 2008, 20(2): 229～233

Zhang Jun, Zhang Xiongjun, Wei Xiaofeng et al.. Depolarization loss analysis of electro-optic crystal KDP heated by repetition frequency laser［J］. High Power Laser and Particle Beams, 2008, 20(2): 229～233

[15] 张雄军, 吴登生, 张君等. 20 mm孔径重复频率等离子体电光开关研究［J］. 光学学报, 2010, 30(6): 1772～1775

Zhang Xiongjun, Wu Dengsheng, Zhang Jun et al.. Research on repetition rate plasma Pockels cell with 20 mm aperture［J］. Acta Optica Sinica, 2010, 30(6): 1772～1775

[16] 赵艳辉, 周建刚, 吴晓东等. 不同结构介质阻挡放电的放电特性［J］. 大连海事大学学报, 2004, 30(3): 59～61, 87

Zhao Yanhui, Zhou Jiangang, Wu Xiaodong et al.. Study on discharge characteristic of different configurable DBD［J］. J. Dalian Maritime University, 2004, 30(3): 59～61, 87

吴登生, 张雄军, 张君, 王仁贵, 田晓琳, 顾侃, 朱俭. 大口径倒腔式等离子体开关[J]. 中国激光, 2012, 39(9): 0902004. Wu Dengsheng, Zhang Xiongjun, Zhang Jun, Wang Rengui, Tian Xiaolin, Gu Kan, Zhu Jian. Large Aperture Plasma Electrode Pockels Cell for Multi-Pass Amplified Scheme[J]. Chinese Journal of Lasers, 2012, 39(9): 0902004.

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