高能量、窄线宽两波耦合双腔ZGP-OPO中红外参量研究

项目名称： 高能量、窄线宽两波耦合双腔ZGP-OPO中红外参量研究

项目编号： No.61275118

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 江海河

作者单位： 中国科学院合肥物质科学研究院

项目金额： 77万元

中文摘要： 中红外激光在军事、环境和科研等领域有着重要的应用，为了实现高分辨率远程探测和目标特性识别，需要发展高能量、窄线宽中红外参量技术。针对通常窄线宽光参量振荡器中插入色散元件阈值高（能量小）、注入种子激光系统复杂等问题，本项目提出一体化两波耦合双腔，利用自主研制的2μm电光调Q Cr:Tm:Ho:YAG激光器作为OPO泵浦源，选用自主生长的大尺寸高损伤阈值ZGP晶体作为中红外参量非线性晶体，开展高能量、窄线宽ZGP-OPO中红外参量研究，实现0.1-0.3cm-1、10mJ的中红外激光输出。探索两波耦合双谐振振荡和光谱展宽机理，建立两波耦合双谐振振荡物理模型，探索谱线压缩方法，建立两波耦合双腔激光振荡方程，研究双谐振振荡器的动力学特性和光谱特性，给出两波增益、振荡阈值、相位匹配、转换效率与腔结构参数和泵浦参数的关系，为推进高能量、窄线宽中红外激光技术应用和自主ZGP非线性晶体发展提供研究基础。

中文关键词： 中红外；ZGP-OPO；LGS；高转换效率；窄线宽

英文摘要： Mid-infrared laser have important applications in fields such as the military, scientific research and the environment, to achieve high-resolution remote detection and target feature recognition, we need to develop high-energy, narrow linewidth mid-infrared optical parametric technology. To the problem of high threshold by inserting dispersion components and complex laser system by seed injection in the usual narrow linewidth OPO, we design a integrative two-wave coupling dual-cavity, utilizing self-made 2μm EO Q-switched Cr:Tm:Ho:YAG laser as the OPO pump source, using the self-grown high damage threshold ZGP crystal as mid-infrared OPO nonlinear crystal, carried out high energy and narrow linewidth research in ZGP-OPO, and achieving the linewidth of 0.1-0.3cm-1 and energy of 10mJ output. Exploring the mechanism of two-wave coupling with double resonant oscillation(DRO) and spectral broadening, building physical model of two-wave coupling with DRO, exploring the way to compress spectrum,building two-wave coupling dual-cavity laser oscillating equation, studying the dynamic characteristics and spectral characteristics of DRO.Giving relations between the two-wave gain, oscillation threshold, phase matching, conversion efficiency and the cavity parameters and pump parameters, providing the research base for promot

英文关键词： mid-infrared；ZGP-OPO；LGS；high conversion efficiency；narrow linewidth