2-5微米大能量光学参量放大技术的研究

项目名称： 2-5微米大能量光学参量放大技术的研究

项目编号： No.61205208

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 李闯

作者单位： 中国科学院上海光学精密机械研究所

项目金额： 25万元

中文摘要： 输出波长2-5μm的高峰值功率红外飞秒脉冲激光在科学、环境、军事等诸多战略高科技领域有着重要的应用价值。利用传统的光学参量放大（OPA）技术结合差频产生（DFG）技术虽然可以实现该波段的激光输出，但转化效率非常低。目前，国际上正在开展利用光学参量放大（OPA）技术直接获得红外长波长激光脉冲的研究，仍有很多技术难点尚未攻克，并且大部分研究还都是在低泵浦功率条件下开展的。本课题拟在实验室原有研究的基础上，进一步将自建的大能量光学参量放大器的输出波长拓展至更长波段（2-5μm）。同时，本课题还将开展红外波段（如2.2μm）脉冲压缩技术的研究，探索在红外波段获得周期量级、载波包络相位（CEP）稳定的激光脉冲的技术途径。

中文关键词： 红外；中红外；飞秒；光学参量放大；

英文摘要： High peak power femtosecond laser pulses in the range of 2-5 μm have great value in many fields such as sicience, environment and militaty. Traditionally, the laser is obtained based on the technology of optical parametric amplification (OPA) and difference frequency generation (DFG), the disadvantage is low conversion efficiency. During these years, great attentions have been paid on the development of OPA system that can directly generate 2-5 μm laser pulses, but there are still a lot of technical problems remain to be solved and most of the research is done under the condition of low pump power. This project is planning to upgrade the home-built high power OPA system and extent its output wavelength to 2-5 μm. Besides, research of laser pulse compression at IR region (2.2 μm, for example) is also included in the project, in order to explore the way of obtaining cycle-level, carrier envelope phase (CEP) stabilized IR laser pulses.

英文关键词： infrared；mid-infrared；femtosecond；optical parametric amplification；