| 阵列光栅压缩器的空域特性 |
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| 引用本文： | 马雪梅,戴亚平,朱健强.阵列光栅压缩器的空域特性[J].强激光与粒子束,2007,19(7):1117-1120. |
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| 作者姓名： | 马雪梅 戴亚平 朱健强 |
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| 作者单位： | 1. 中国科学院 上海光学精密机械研究所, 上海 201800;2. 中国工程物理研究院 激光等离子体研究所, 上海 201800 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 引入角度偏差、位移偏差作为拼接光栅系统的物理参数，定义了拼接光栅的孔径函数，利用傅里叶角谱理论研究了高斯脉冲入射拼接光栅压缩器后的远场分布特性。研究表明：出射脉冲仍然是高斯型脉冲，但包络中心发生偏移，偏移量由角度偏差量和光束口径决定;位移偏差引入的相位随着拼接光栅压缩器传递，其对远场焦斑的影响，取决于每片子光栅的非整数倍光栅常数的横向位移偏差和纵向位移偏差的综合作用。通过数值计算得到了各维偏差对阵列光栅压缩器空域特性的影响,计算表明:光栅面外角度偏差(俯仰左右)和条纹平行度偏差都必须控制在1 mrad以内，在此范围内，应将位移偏差控制在52 nm以内。
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| 关 键 词： | 角度偏差 位移偏差 角谱 拼接光栅 空域特性 皮秒激光 |
| 文章编号： | 1001-4322（2007）07-1117-04 |
| 收稿时间： | 2007/1/18 |
| 修稿时间： | 2007-01-18 |
Spatial characteristic of tiled-grating compressor |
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| MA Xue-mei,DAI Ya-ping,ZHU Jian-qiang.Spatial characteristic of tiled-grating compressor[J].High Power Laser and Particle Beams,2007,19(7):1117-1120. |
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| Authors: | MA Xue-mei DAI Ya-ping ZHU Jian-qiang |
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| Institution: | 1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 800-211, Shanghai 201800, China;2. Shanghai Institute of Laser Plasma, CAEP, P.O.Box 800-229, Shanghai 201800, China |
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| Abstract: | Introducing the tip-tilt and piston error as the parameter and defining the aperture function of the tiled-grating,far-field property was analyzed with Gaussian beam incidence using the theory of Fourier angular spectrum.The results showed that the output beam was Gaussian while the center of the envelope shifted,the shift magnitude was determined by angle errors and beam size.The phase difference caused by piston error translated with the tiled-grating compressor,the focal spot was affected by both non-integral number of grating space and out-of-plane piston error.Numerical simulation showed the effect on the spatial characteristic of the tiled-grating compressor due to alignment errors. |
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| Keywords: | Tip-tilt error Piston error Angular spectrum Tiling-grating Spatial characteristic Picosecond laser |
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