| 王晓雷,石炳川,朱竹青,王强.频率啁啾对飞秒激光脉冲干涉场的影响[J].光电子激光,2014,(3):608~613 |
| 频率啁啾对飞秒激光脉冲干涉场的影响 |
| Influence of frequency chirp on interference field of femtosecond laser pulses |
| 投稿时间：2013-07-03 |
| DOI： |
| 中文关键词: 飞秒激光全息 数字全息 啁啾脉冲 |
| 英文关键词:femtosecond laser pulses holography digital holography chirped pulse |
| 基金项目:国家自然科学基金(61275133)资助项目 (1.南开大学 现代光学研究所,光学信息技术科学教育部重点实验室,天津 300071； 2.南京师范大学 物理科学与技术学院,江苏省光电技术重点实验室,江苏 南京 210023) |
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| 中文摘要: |
| 对具有频率啁啾的飞秒脉冲的干涉场分布特性进 行了研究。分别模拟了物光存在啁啾、参考 光存在啁啾以及物光与参考光均存在啁啾3种情况下高斯飞秒脉冲的干涉图,并从干涉图中 提取了载频相 位。通过对提取的载频相位分析,研究了频率啁啾对干涉场的影响。结果表明,脉冲的频率 啁啾将导致干 涉条纹对比度的下降和条纹周期的改变。当物光和参考光仅有一束存在啁啾时,干涉场条纹 的对比度整体 下降,并且条纹周期发生线性改变；当物光与参考光同时具有相同的频率啁啾时,位于干涉 场边缘的条纹 的衬比度会严重下降,这将导致干涉场的有效记录区域减小。本文研究对于飞秒数字全息的 实验控制和数字重构精度均具有重要的参考价值。 |
| 英文摘要: |
| The interference fringe pattern of Gaussian distributed femtosecond la ser pulses with frequency chirping is studied in this paper.Holograms in three cases of only ob ject pulse with frequency chirping,reference pulse with frequency chirping and the two pulses w ith the same frequency chirping together are simulated respectively and the carrier phases are recons tructed from the holograms.By analyzing the spatial distribution characteristics of the reconstru cted carrier frequency,the influence of the frequency chirping on the interference fringe pa ttern is studied. The computer simulation results show that the frequency chirping of pulses will result in the decrease of the contrast of the interference fringe and the change of the period of the i nterference fringe.When only object beam or reference beam has the frequency chirping,the contrast of the whole hologram will decrease and the fringe period will change linearly;when bo th object beam and reference beam have the same frequency chirping,the contrast of fringe area of the interference field will decrease seriously,which will result in the sharp decrease of effecti ve recorded area of the interference field.The research is very important for the experiment per formance of femtosecond laser pulses digital holography or interference and the precision of digital reconstruction in phase measurement. |
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