差频产生中红外光源的线宽分析  

Mid-Infrared Laser Linewidth Analysis Based on Difference Frequency Generation

作　　者：陈长水[1] 韦俊雄[1] 刘颂豪[1] 

机构地区：[1]华南师范大学光子纳米生物技术研究中心,广东广州510631

出　　处：《激光与光电子学进展》2012年第2期92-97,共6页Laser & Optoelectronics Progress

基　　金：广东省自然科学基金重点项目(10251063101000001;8251063101000006);国家自然科学基金面上项目(60878063)资助课题

摘　　要：差频法具有无需复杂腔型调整、输出激光调谐范围宽、效率较高等综合优点,是获得3～5μm中红外激光光源的重要手段。推导了差频产生中红外激光的输出光波长、线宽以及功率的公式,重点讨论了输出激光线宽与抽运光波长和线宽、信号光线宽以及温度等因素的关系。结果表明,输出激光线宽主要由抽运光和信号光的线宽决定。Difference frequency generation is an important method to obtain 3~5 μm mid-infrared laser.It does not need complex structure adjustment of cavity,the tuning range of output laser is wide,and the efficiency is high.We derive the formulas of output wavelength,linewidth and output power of the mid-infrared laser obtained from difference frequency generation.The dependences of output linewidth on pump light wavelength,pump light linewidth,signal light linewidth and temperature are emphasized.Numerical results show that the output linewidth is mainly decided by the pump light linewidth and the signal light linewidth

关 键 词：激光器 中红外激光 差频产生 准相位匹配 输出光线宽 

分 类 号：O436[机械工程—光学工程]