基于受激拉曼散射和二阶非线性光学频率变换技术的新型激光器研究

项目名称： 基于受激拉曼散射和二阶非线性光学频率变换技术的新型激光器研究

项目编号： No.61475086

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 陈晓寒

作者单位： 山东大学

项目金额： 78万元

中文摘要： 本课题提出一种创新性的思路，以结合受激拉曼散射和二阶非线性光学频率变换技术方式，获得紫外（UV）至近红外（NIR）波段新波长激光器实现方案。该方案同时结合受激拉曼散射（三阶非线性效应）和倍频、和频、OPO（二阶非线性效应）两种频率变换手段，可产生波长覆盖UV至近红外波段激光输出，波长覆盖范围广，波长选择具有多样性与灵活性特点。理论上，在考虑拉曼晶体热效应和腔内光子数密度空间分布基础上建立完整的描述该类激光器运转的速率方程理论，为该类激光器设计及优化提供指导。实验上，采用不同的谐振腔结构设计，分别完成基于受激拉曼散射的倍频（和频）激光器和拉曼泵浦OPO激光器两大类激光器的设计研究。本课题提供的频率变换手段可充分利用受激拉曼散射高转换效率以及光束净化的优点，可有效提高倍频（和频）、OPO转换效率，有望获得高光束质量、高效率运转的新波长激光输出。

中文关键词： 受激拉曼散射；倍频技术；和频技术；光参量振荡

英文摘要： The subject propose an innovative idea combing the stimulated Raman scattering and second-order nonlinear optical frequency conversion technology to generate the new laser wavelengths covering ultraviolet (UV) to near infrared (NIR) bands. The program combine stimulated Raman scattering (third-order nonlinear effect) and SHG, SFG, OPO (second-order nonlinear effect) frequency conversion technologies, the output wavelengths cover UV to the near infrared band, the wavelength coverage is wide and the wavelength selection has the merits of diversity and elasticity. In theoretical work, considering the thermal effects of the Raman crystals and the spatial distribution of the photon densities in the cavity, we will establish a rate equation theory to describe the operation of such lasers, to provide guidance to the laser design and optimization. In Experimental work, using different resonator structures, we will study the output characteristics of these two types of lasers, SHG (SFG) of Raman lasers and Raman pumped OPO lasers. This frequency converting technology provided in this subject can take full advantages of the high conversion efficiency and the beam clean-up effect of the stimulated Raman scattering, can effectively improve the conversion efficiency of SHG (SFG), OPO lasers, and high beam quality, high conversion efficiency of the new wavelength lasers are expected.

英文关键词： SRS;SHG;SFG;OPO