| 宽光束进入展宽器提高输出脉冲对比度分析 |
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| 引用本文： | 杨庆伟,郭爱林,谢兴龙,张福领,高奇,李美荣,林尊琪.宽光束进入展宽器提高输出脉冲对比度分析[J].光子学报,2008,37(5):891-895. |
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| 作者姓名： | 杨庆伟 郭爱林 谢兴龙 张福领 高奇 李美荣 林尊琪 |
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| 作者单位： | 国家高功率激光物理实验室,中国科学院上海光学精密机械研究所,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： | 根据分析啁啾脉冲对比度模型,通过光线追迹法详细分析了展宽器对输出脉冲对比度的影响.发现当扩大进入展宽器的入射光束口径,从2 mm扩大到40 mm时,输出脉冲的对比度提高了近两个数量级;同时发现在相同条件下,当输入脉冲为双曲正割函数时,其输出脉冲的对比度明显好于输入脉冲为高斯脉冲和矩形脉冲的情形.
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| 关 键 词： | 啁啾脉冲放大 对比度 脉冲展宽器 脉冲对比度 |
| 收稿时间： | 2006-11-29 |
| 修稿时间： | 2007-03-07 |
Analysis of Improved Contrast from a Chirped Pulse Amplification Laser System by Increasing the Beam Size in the Stretcher |
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| YANG Qing-wei,GUO Ai-lin,XIE Xing-long,ZHANG Fu-ling,GAO Qi,LI Mei-rong,LIN Zun-qi.Analysis of Improved Contrast from a Chirped Pulse Amplification Laser System by Increasing the Beam Size in the Stretcher[J].Acta Photonica Sinica,2008,37(5):891-895. |
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| Authors: | YANG Qing-wei GUO Ai-lin XIE Xing-long ZHANG Fu-ling GAO Qi LI Mei-rong LIN Zun-qi |
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| Abstract: | The impact of the stretcher on the contrast ratio of the out pulse is analyzed making use of the ray-tracing method, which is based on the contrast ratio model of chirped pulse.When the beam size in the stretcher is increased from 2 mm to 40 mm,the contrast of the output pulse approximately increase two magnitude.When the input pulse is Sech2,the contrast of the output pulse is better than what the input pulse is Gassian or Rectangular. |
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| Keywords: | Chirped pulse amplification Contrast Pulse stretcher Pulse contrast ratio |
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