受激喇曼散射及其在超短脉冲激光技术中的应用
文献类型：学位论文
| 作者 | 李伟 |
| 学位类别 | 硕士 |
| 答辩日期 | 2002 |
| 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 | 受激喇曼散射 超短脉冲 啁啾 激光技术 |
| 其他题名 | Stimulated Raman Scattering and Its Application in Ultra-short Pulse Laser Techniques |
| 中文摘要 | 该论文主要讨论了受激喇曼散射原理及其用于实现新的超短脉冲激光辐射源的若干技术问题.超短脉冲辐射由于受到可用工作介质种类和性质的限制,目前频率范围依然受到了很大的限制.受激喇曼散射由于具有频率平移的功能,因此完全可以用来作为拓展超短脉冲频率范围的有效手段之一.但是当受激喇曼散射的激发光脉冲宽度短于喇曼介质的消相位时间时,受激喇曼散射会表现出强烈的瞬态特性,由此而引发的一些负面效应会严重影响受激喇曼散射的转换效率.因此,在实验上直接应用瞬态受激喇曼散射对超短脉冲(特别是飞秒量级)进行频率平移往往并不可行.考虑到用含有啁啾的脉冲泵浦的受激喇曼散射过程中,泵浦脉冲的啁啾会直接传递到斯托克斯脉冲,因此一种"展宽——受激喇曼散射——压缩还原"的方案可以被用来实现超短脉冲中心频率平移.实验结果证明,利用这一方案实现新的超短脉冲辐射源将是完全可行的.该论文将就以上提及的诸方面理论及技术细节做出讨论. |
| 英文摘要 | The principle of stimulated Raman scattering (SRS) and some techniques on generation of novel ultra-short laser pulses with SRS have been discussed in this thesis. Owing to the limitation of laser medium, at the present time, the spectral range of ultra-short pulses is considerably restricted. Since its ability of frequency shift, SRS may be used as one of effective methods to extend spectral range of ultra-short pulses. However, in the transient regime where the duration of exciting laser pulse is shorter than the dephasing time of Raman medium, transient effects will result in a much lower conversion efficiency, consequently, direct frequency shift of ultra-short laser pulses (especially, for femtosecond pulses) with transient SRS is experimentally infeasible. Based on the conclusion that the chirp of pump pulses can be directly transfered to the Stokes wave in chirped-pulse pumped SRS, frequency shift of ultra-short pulses may be achieved by a "broadening-SRS-compression" scheme. The experimental result also shows good approval of the scheme. Theoretical principle and technical implementation mentioned above will be detailed in the following chapters. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16633]  |
| 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 | 李伟. 受激喇曼散射及其在超短脉冲激光技术中的应用[D]. 中国科学院上海光学精密机械研究所. 2002. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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