基于低温工作方式的重复频率短脉冲技术研究与应用
文献类型：学位论文
| 作者 | 瞿叶玺 |
| 学位类别 | 硕士 |
| 答辩日期 | 2012 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 李学春 |
| 关键词 | 超短脉冲光参量放大 光纤锁模激光器 增益窄化 低温 Yb:YAG |
| 其他题名 | Research and application on repeated short pulse based on cryogenic working mode |
| 中文摘要 | 光参量啁啾脉冲放大(OPCPA)技术是对超短脉冲进行能量放大的最有效技术，而泵浦源技术是其中最重要的技术之一。为了提高OPCPA信号光脉冲信噪比，有人提出了短脉冲光参量放大(SPOPA)和长脉冲光参量放大结合的方法，对SPOPA泵浦光的基本要求是泵浦光脉宽要小于10ps。而高重复率激光脉冲在工业、科研、军事等领域具有广泛的应用潜力。为了获得高质量千赫兹皮秒级短脉冲泵浦源，本文开展了以下工作： 首先介绍了皮秒短脉冲泵浦源设计方案，分析了Yb:YAG增益介质的特性，分析了再生放大器的增益窄化效应，利用Yb:YAG在低温下窄的发射线宽和大的热导率提出了千赫兹皮秒短脉冲泵浦源的设计方案。方案使用低温Yb:YAG再生放大器作为短脉冲泵浦源前端预放装置。 然后建立了用于皮秒短脉冲泵浦源的种子源。SPOPA对信号光和泵浦光的同步精度提出了要求，而同源OPCPA可以实现全光同步，同步精度非常高。作为超短脉冲OPCPA系统的种子源，锁模振荡器除了有脉冲能量、锁模中心频率、光谱带宽、脉冲形状等方面的要求外，还有对锁模运行稳定性、可靠性和开机锁模自启动能力的要求。文中采用非线性偏振旋转结合啁啾脉冲滤波的技术建立了一台高性能光纤锁模激光器。 最后对皮秒短脉冲泵浦实验进行了前期实验研究。实验获得了能量217μJ，脉宽5.5ps，谱宽0.3nm，重复频率10Hz的光脉冲输出。并提出了解决短脉冲放大能量稳定性的方案。 |
| 英文摘要 | Optical parametric chirped pulse amplification(OPCPA) is the most effect technology for amplifying the energy of super short pulse, of which pumping source is one of the most important technology. Someone have raised short pulse optical parametric amplification to improve the contrast of OPCPA signal pulses, and the basic requirement is the pulse width of the pump must be smaller than 10 picoseconds. And high repetition laser pulse has extensive application potent. To get a high quality, picoseconds scale high repetition short pulse pump, this paper carries out the following jobs: First, the design proposal of picoseconds short pulse is introduced; the property of Yb:YAG gain medium is analyzed; the gain narrowing effect of regenerative amplifier is studied. As the narrow stimulated emission spectrum width and big thermal conductivity of Yb:YAG under low temperature, a design proposal of kilohertz picoseconds short pulse pump is presented. A cryogenic Yb:YAG regenerative amplifier is use as the frontend amplification device. Then a seed source used for picoseconds pump is built. SPOPA set forth requirements for the synchronization accuracy of the signal light and pump light; and homologous OPCPA can achieve all-optical synchronization, the synchronization accuracy is very high. Mode-locked oscillator as seed source of ultra short pulse OPCPA system put forward demands of the pulse energy, center frequency, spectral bandwidth, pulse shape as well as stability, reliability and self-starting capabilities. In this article, a high-performance mode-locked fiber laser utilizing nonlinear polarization evolution with chirped pulse spectral filtering is established. At last, early experimental study of short picoseconds pulse pumping is conducted. The experiment obtains pulse of 217 μJ energy, 5.5ps pulse width, 0.3nm spectrum width and 10Hz repetition. Project to solve energy stability is presented. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16733]  |
| 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 | 瞿叶玺. 基于低温工作方式的重复频率短脉冲技术研究与应用[D]. 中国科学院上海光学精密机械研究所. 2012. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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