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题名	超短激光脉冲参数测试技术研究
作者	郑留念
学位类别	硕士
答辩日期	2007
授予单位	中国科学院上海光学精密机械研究所
导师	朱健强
关键词	超短激光脉冲 光谱位相相干测量 位相误差 二次谐波
其他题名	Study on the Techniques of Measuring the characteristics of Ultrashort Laser Pulses
中文摘要	近二十年来，超短激光技术取得了飞速发展，目前已经能够获得短至一两个 光学周期的飞秒（fs）脉冲。在物理学、生物学、化学等领域，超短激光脉冲已 经被用作一种观测各种动力学过程和超快现象的工具。超短激光脉冲的广泛应 用，首先需要有效的脉冲参数测试工具。脉冲参数的准确测量，有助于产生更短 的激光脉冲和脉冲整形，控制脉冲的位相也有助于得到高功率的激光、高次谐波 和阿秒脉冲。国外对超短激光脉冲参数测量方法进行了大量研究，产生了多种超 短激光脉冲的测量技术，而国内对该方面的技术的研究较少并且不够深入，因此 开展这方面的研究工作具有实际意义。 本文主要研究了超短激光脉冲测量中的光谱位相相干直接电场重建法 （SPIDER）。该测量方法没有移动元件，只需要探测一维的数据，算法简单容易 实现，具有实时测量的效果，拥有更好的研究和应用价值。 本文第一章阐述了近年来超短激光脉冲参数测量技术的发展，着重分析了自 相关法、频率分辨光学开关法和GRENOUILLE 法，并对这些方法的性能进行了 比较。 本文第二章详细阐述了光谱位相相干法的原理。从脉冲相干概念出发，介绍 了光谱剪切的原理，SPIDER 的数据处理方法和一般实验光路。还介绍了简化的 SPIDER 仪器方案，最后通过SPIDER 仪器的实验，展示了该仪器在脉冲压缩测 量方面的应用。 本文第三章研究了光谱位相相干法中的主要参数对仪器测量精度的影响。以 均方根（rms）误差评价理论，模拟分析光谱频率剪切误差、光束之间延迟、滤 波窗口宽度和测量噪声对测量位相误差的影响，以及仪器校正误差对测量的影 响。 本文第四章研究了脉冲倍频作用对位相相干测量的影响。首先分析了光在非 线性晶体里的传播、脉冲之间位相匹配和晶体厚度在测量中的影响，在此基础上 结合SPIDER 测量的原理，得出了测量中的超短脉冲二次谐波产生理论。根据该 理论得出光束倍频作用产生的位相相干测量误差，获得了测量结果的强度调制函 数，非共线位相匹配、群速失配对测量位相的影响。 通过本文的研究工作，可以对位相相干测量方法有全方面深入的了解。运用 本文设计的简易实时飞秒测试仪器，可以获得更加简单的SPIDER 测量装置；通 过分析测量参数对位相相干测量精度的影响，可以更好的设计实验器件；根据本 文对位相相干测量的倍频影响理论，可以在测量后的波形重建程序中将仪器本身 的误差进行修正，设计更高精度的仪器以及获得更准确的实验结果。
英文摘要	In the last two decades, with the rapid development of femtosecond optics, it is possible to get the ultrashort optical pulses short to 1~2 cycle regime. Now, femtosecond laser pulse has been used as an important tool in study the process of different kinds of dynamics and ultrafast phenomenons. First of all, the research about the effective techniques to measure the characteristics of ultrashort pulses should be developed with the comprehensive use of ultrashort pulses. Not only the accurate measurement of the characteristics of ultrashort pulses is facility to produce shorter pulses, but also the control of pulse phase will be useful to produce high power lasers and high harmonic and attosecond pulses. In abroad, the techniques to measure the characteristics of ultrashort pulses have been developed, but few of the study of these methods has been reported in china and most of the researches are superficial. So the research of this area is significant. In this thesis, some research works has been done in the technique of characteristics of ultrashort pulses with the spectral phase interferometry for direct electrical reconstruction (SPIDER). There is no moving unit in the apparatus, and the instrument requires only one dimensional data and the pulse retrieval algorithm is simple to work. The SPIDER is a real-time technique and powerful in application. In the first section, it summarized the progress of the methods to measure the characteristics of ultrashort pulses. The methods of autocorrelation and frequency-resolved optical gating and GRENOUILLE, and the comparison of these representative methods have been introduced, In the second section, the principle of SPIDER has been summarized. The theory of interference of pulses and the principle of spectral shearing have been introduced. Then, it introduces the method of robust algorithm and the general components of this device. Also, it gives a reference to the simplified SPIDER. In the last of the section, it shows the application in pulse compression with the experiment of SPIDER. In the third section, the error analyses of some parameters have been conducted for characterizing ultrashort pulse with SPIDER. With the root-mean-square(rms) field error criterion, it computes numerically the effect of phase on spectral frequency error and analyses completely the phase errors which are induced by the two pulses delay and the filter window width and signal-to-noise. Also, it analyses the influence of the calibration of SPIDER. In the fourth section, the analyses of SHG errors have been conducted firstly for characterizing ultrashort pulse with SPIDER. First, the propagation of optical-field in the nonlinear medium, the influences by the phase-match requirement of nonlinear crystal and the length of nonlinear crystal have been introduced. With the principle of SPIDER, it derives a detailed description of SHG for ultrabroad-band pulse. Then, it analyses the modulation function for the recorded interferometric intensity and the phase errors induced by noncollinear phase matching and group-velocity mismatch for ultrabroad-band pulse. Based on the author’s research work, this thesis has paved the way for deep understanding of SPIDER. A simpler SPIDER has been invented by the author for characterizing ultrashort pulses. With the analysis of the parameters of SPIDER, it is beneficial to select optimum components. According to the error theory of SHG, the reconstructed pulses could be compensated and the retrieved pulses and the experimental results will be more consummate.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16399]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	郑留念. 超短激光脉冲参数测试技术研究[D]. 中国科学院上海光学精密机械研究所. 2007.

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