全固态调Q锁模光参量振荡中红外激光特性研究

项目名称： 全固态调Q锁模光参量振荡中红外激光特性研究

项目编号： No.61308057

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 王静

作者单位： 济南大学

项目金额： 26万元

中文摘要： 全固态3-5μm中红外波段激光，位于大气窗口，具有广泛的应用。光学参量振荡（OPO）是产生该波段激光的重要手段之一，调Q、连续波锁模OPO激光特性的研究较为广泛。与调Q、连续波锁模激光相比，调Q锁模激光具有更高的峰值功率，因此，调Q锁模激光泵浦的OPO有望获得更高的转换效率和更高的峰值功率。本项目拟利用调Q锁模激光作泵浦源，优良的KTA作为非线性晶体，采用复合内腔和四镜线型腔，设计OPO腔长与基频激光谐振腔长，实现同步泵浦并使中红外闲频光的重复率依赖于基频光，实现OPO的3.3-4.8μm闲频光单谐振输出。探索调Q锁模激光泵浦OPO产生中红外激光的机理，揭示高效率、高峰值功率3-5μm OPO调Q锁模激光产生的基本原理，研究OPO中红外调Q锁模激光的运转规律和输出参数的优化特性，为高效率、高峰值功率3-5μm调Q锁模激光的实现提供规律性依据，进一步拓展中红外锁模激光的应用。

中文关键词： 调Q锁模；内腔光参量振荡；中红外激光；同步泵浦；

英文摘要： The 3-5μm spectral region is in the range of most promising atmospheric transmission window. This spectral region has extensive applications. Optical parametric oscillator (OPO) can produce such laser. Recently, there is lots of research in continuously and Q-switched OPOs. Compared with the continuous wave mode locking, Q-switched mode locking leads to high peak energy and favors the high conversion efficiency and high peak energy OPO. Firstly, besides the four-mirror cavity, the inner cavity will be applied, which is often used in the Q-switched ns OPO. The length of the OPO cavity will be designed to prove synchronously pumping. The repetition rate of idler light will rely on the fundamental pulse. The designed SRO OPO will produce 3.3-4.8μm idler output in the project, which is pumped Q-switched mode-locking fundmental laser. The KTA crystal will be used as nonlinear media, which is put in a compound cavity or four-mirror cavity. The optical length of OPO and fundamental cavity will be matched to satisfy synchronously pumping. The repetition of mid-infrared idler light will depend on fundamental laser. The mechanism of the Q-switched mode-locking laser pumped OPO and the principle of the high conversion-efficiency and high peak-energy Q-switched mode locking OPO will be explored. The rule of the OPO and the

英文关键词： Q-switched and mode-locking；intra-cavity optical parametric oscillator；mid-infrared laser；synchronously；