超短激光脉冲的测量、整形与同步技术研究
文献类型：学位论文
| 作者 | 唐斌 |
| 学位类别 | 硕士 |
| 答辩日期 | 2003 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 张正泉 |
| 关键词 | 超短激光脉冲特性测量 超短激光脉冲整形 色散补偿 超短脉冲 延时同步测量 |
| 其他题名 | The Study of the Techniques of Measuring, Shaping and Synchronizing of Femtosecond Optical Pulses |
| 中文摘要 | 随着超快光学的迅速发展，目前在物理学，生物学，化学等领域中，飞秒级的超短激光脉冲已经被用做一种观测各种动力学过程和超快现象的工具。在超快光学研究中，脉冲特性测量技术研究是非常重要的一部分。脉冲特性的正确测量不仅有助于产生更短的脉冲和脉冲整形，而且测量和控制脉冲的相位还有助于高次谐波和阿秒脉冲的产生。在国外，超短激光脉冲特性测量的技术研究己经进行了许多年，同时也取得了许多成就，而在国内，相应的研究可以说刚刚起步，因此开展这方面的研究工作具有重要的意义。在本论文阶段，作者主要进行了以下三方面工作。作者从事了有关超短激光脉冲特性测量的研究工作，主要是研究比较了两种当今常用的测量方法，即频谱干涉直接重组脉冲电场方法和频率分辨光快门法。其次，作者结合频谱干涉直接重组脉冲电场方法对超短脉冲位相分布和脉冲强度随时间变化的测量，通过可变形镜技术实验，研究了脉冲相位补偿方法。作者还提出一种超短脉冲延时同步测量技术。很好的解决了实验中经常遇到的两个脉冲之间延时的同步性问题。本文第一章概述了超短激光脉冲特性测量的方法。简要介绍了超短激光脉冲在当今各学科研究中的重要作用，以及当前常用的几种超短脉冲参数测量方法。第二章详细地比较研究了常用的超短激光脉冲特性测量方法。主要是频谱干涉直接重组脉冲电场方法（SPIDER）和频率分辨光快门法（FROG）。详细分析了这两种方法的物理背景、实现方法，和它们的数据处理方法。同时还介绍了基于SHG FROG方法的GRENOUILLE方法等。在理论分析的基础上，作者设计了一台基于SHG FROG的超短脉冲单发侧量仪。另外，还提出了一种；则量弱脉冲参数的方法。这部分工作为今后各种超短脉冲的参数测量实验提供了基础。第三章首先讨论了超短激光脉冲在介质材料中的传播理论及其数值方法。然后重点研究了脉冲整形技术，主要是相位补偿技术。介绍了被动相位补偿中的光栅对、棱镜对、啁啾镜等方法，以及主动相位补偿的空间光调制器，声光调制器，可变形镜等方法。对各种方法进行了比较。并结合SPIDER对超短脉冲位相分布和脉冲强度随时间变化的测量，给出了利用可变形镜进行相位补偿的实验演示研究结果。这部分工作为今后超短脉冲的整形，特别是脉冲色散补偿提供了一种经济有效的方法，奠定了实验基础，对今后超短激光光束质量的改善工作有实际的指导意义。第四章介绍了作者参与发明的一种超短脉冲延时同步测量技术。该技术实验中测量精度可以达到飞秒量级，而且调节方便，较好的解决了超短激光技术实验室中经常遇到的脉冲延时同步问题。通过本论文的研究工作，作者对当前超快光学中常用的脉冲特性测量技术做了详细的研究，为今后进一步的实验工作中具体测量方法的使用，以及不同测量方法的选择提供了分析比较的依据。作者在超短脉冲整形方面的研究提供了一种脉冲色散补偿方法，具体实验方案可以直接应用到今后实验室超短激光系统光束质量改善的实验研究中。这方面工作为本实验室超短超强激光系统的性能测试及提高提供了一定的实验基础。超短脉冲延时同步测量技术也为各种超快光学实验中类似问题提供了一种有效方法。总而言之，作者的论文研究工作对今后实验室相关工作有较大的实际意义。 |
| 英文摘要 | With the rapid development of femtosecond optics, it is possible to get ultrashort optical pulses short to l～2-cycle pulses. Now, femtosecond optical pulse has been used as an important tool in study the process of different kinds of dynamics and ultrafast phenomenon. In the area of femtosecond optics, the research on the techniques of the characteristics measurement. Only by the accurate measurement of the characteristics of ultrashort pulse could facility produce shorter and cleaner pulses. Though the techniques to measure the characteristics of ultrashort pulses have been developed for many years abroad, it hasn't been reported much in China till now. Thus it is important and meaningful to cut this area's research work. In this thesis, it has done some research works in the techniques to measure the characteristics of ultrashort pulses. It is mainly about measurement of the spectral phase and intensity in time zone. According to results of the measurement, we have researched on ultrashort pulse phase compensation. In the first section, it summarized the methods to measure the characteristics of ultrafast pulse. In the second section, it analyzed several techniques for femtosecond optical pulses measurement, which are used today. We emphasis on the method of SPIDER (Spectral Phase Interferometry for Direct Electric Field Reconstruction) and FROG (Frequency-Resolved Optical Gating), analyze their arithmetic in detail. We also set up a SHG FROG for single-shot pulse measurement. Another method GRENOULLE has been introduced, too. And we also discussed the way to measure very weak pulse. In the third section, we studied the propagation of optical-field in the medium first. Then we research about the method of ultrashort optical pulse shaping. We emphasis on the method for phase compensation, which is divided into two classes: passive and active. For the former ones, we introduce the grating pairs, prisms pairs, chirped pairs, and their combination. For the latter ones, we introduce the SLM (Spatial Light Modulator), the AOPDF (Acousto-Optic Programmable Dispersive Filter), the MMDM (Micromachined Deformable Mirror). We do the comparison, and experiment on the method by MMDM. In the fourth section, it introduced a new technique for the synchronization measurement of ultrashort pulse's delay. The precision of measurement can reach to the order of femtosecond. As to the conclusion, we analysis popular methods of ultrafast pulse measurement in details, which provides instructive guide for future research. Our method of phase compensation by using MMDM can be used directly to the research for improvement of quality of ultrafast laser beam. And our technique for ultrafast pulses synchronization is an effective way for similar experiments. Based on the author's research work, this thesis has paved the way for many research experiments in our laboratory. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16634]  |
| 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 | 唐斌. 超短激光脉冲的测量、整形与同步技术研究[D]. 中国科学院上海光学精密机械研究所. 2003. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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