光学学报, 2010, 30 (10): 3005, 网络出版: 2012-10-24  

光束的时空调制对自相关信号影响分析

Effect of Temporal and Spatial Modulation on Noncollinear Autocorrelation
作者单位
中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
摘要
通过采用分步傅里叶变换方法求解非共轴相关耦合波方程,分析了单发次自相关方法测试脉冲宽度时光束空间和频率调制对自相关信号的影响。分别讨论了两束基频光都存在空间调制和一束基频光在传输光路中强度分布受到调制等情况下的谐波信号变化。模拟结果表明谐波信号的调制随入射基频光调制度增大而增加,随基频光强调制频率增大而减少。相关信号外包络线与光束未调制情况下得到的结果一致,脉冲啁啾只是导致自相关信号效率降低。提出了基于自相关函数外包络线求解被测试信号脉冲宽度的方法,为正确测试脉冲宽度提供了理论依据。
Abstract
The slip step Fourier transform method is adopted to study the coupled-wave equation of noncollinear autocorrelator. The influence of spatial intensity distribution and pulse chirp of the fundamental beams on measurement of pulse duration of second-order autocorrelation signal are simulated. Two fundamental beams and only one fundamental beam modulated by spatial intensity distribution are respectively discussed. It is shown that the irregular spatial intensity distribution modulation of the second harmonic beams increases with the fundamental beam modulation and decreases with modulated intensity increase of the fundamental beam. The outside envelope of the autocorrelation with irregular spatial intensity distribution is the same as that of the autocorrelation without modulation. The pulse chirp only leads to efficiency decrease of autocorrelation. The method of pulse duration derived from outside envelope of autocorrelation is presented. The analyzing results are of reference value for the exact measurement of pulse duration.
参考文献

[1] F. Salin, P. Georges, Groger et al.. Single-shot measurment of a 52 2 fs pulse[J]. Appl. Opt., 1987, 26(21): 4528~4531

[2] M. Raghuramaiah, A. K. Sharma, P. A. Naik et al.. A second-order autocorrelator for single-shot measurement of femtosecond laser pulse durations[J]. Sadhana, 2001, 26(6): 603~611

[3] 王兴涛, 印定军, 帅斌 等. 应用全反射二阶自相关仪测量超短脉冲脉宽[J]. 中国激光, 2004, 31(8): 1018~1020

    Wang Xingtao, Yin Dingjun, Shuai Bin et al.. Measure ultrashort pulsewidth with total reflection second-order autocorrelator[J]. Chinese J. Lasers, 2004, 31(8): 1018~1020

[4] O. Konoplev, Y. Fisher, D.Meyerhofer. Ultra-high dynamic range measurement of high contrast pulses using a second order autocorrelator[J]. LLE Review, 1999,75: 159~168

[5] 欧阳小平, 张福领, 张攀政 等.短脉冲激光的二阶自相关[J]. 中国激光, 2009, 36(3): 742~745

    Ouyang Xiaoping, Zhang Fuling, Zhang Panzheng et al.. Second order autocorrelation applied to femtosecond laser[J]. Chinese J. Lasers, 2009, 36(3): 742~745

[6] 王兆华, 王鹏, 魏志义 等. 超短超强激光对比度的测量研究[J]. 强激光与粒子束, 2004, 16(4): 434~436

    Wang Zhaohua, Wang Peng, Wei Zhiyi et al.. Contrast measurement of ultra-intensity laser and particle beams[J]. High Power Laser and Particale Beams, 2004, 16(4): 434~436

[7] 邓青华, 彭翰生, 张小民 等. 光学参变啁啾脉冲放大相位失配啁啾脉冲频谱整形新方法[J].光学学报,2007, 27(2): 354~359

    Deng Qinghua, Peng Hansheng, Zhang Xiaomin et al.. New method of chirped-pulse spectrum shaping using phase mismatched optical parametric chirped pulse amplification[J]. Acta Optica Sinica, 2007, 27(2): 354~359

[8] V. G. Dmitriev, L. V. Tarasov. Applied nonlinear optics[M]. Moscow: Radio and Communication, 1982: 206~208

[9] G. P. 阿戈沃 非线性光纤光学原理及应用[M], 贾东方等译. 第3版. 北京: 电子工业出版社, 2002: 33~35

    G. P. Agrawal, Nonlinear Fiber Optics[M]. Jia Dongfang et al.. transl., 3rd ed., Beijing: Publishing House of Electronics Industry, 2002: 33~35

[10] P. J. Wegner, J. M, Auerbach, C. E. Barker et al.. Frequency converter development for the National Ignition Facility[C]. SPIE, 1999, 3492: 392~405

[11] W. M. Peter, J. M. Auerbach, D. Eimerl. Frequency conversion modeling with spatially and temporally varying beams[C]. SPIE, 1995, 2633: 230~241

[12] 王丽, 韩秀友. 参变过程中的群速延迟对晶体匹配长度的影响[J], 光学学报,2007, 27(2): 313~317

    Wang Li, Han Xiuyou. Influence on crystal matching length by group velocity delay in optical parametirc process[J]. Acta Optica Sinica, 2007, 27(2): 313~317

[13] 孙志红, 彭志涛, 刘华 等. 高功率激光近场空域计算方法[J], 中国激光, 2008, 35(4): 544~548

    Sun Zhihong, Peng Zhitao, Liu Hua et al.. Calculation methods of high power laser near field parameters[J]. Chinese J. Lasers, 2008, 35(4): 544~548

孙志红, 夏彦文, 刘华, 傅学军. 光束的时空调制对自相关信号影响分析[J]. 光学学报, 2010, 30(10): 3005. Sun Zhihong, Xia Yanwen, Liu Hua, Fu Xuejun. Effect of Temporal and Spatial Modulation on Noncollinear Autocorrelation[J]. Acta Optica Sinica, 2010, 30(10): 3005.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!