中红外宽调谐连续Nd:YVO_4/PPMgLN光学参量振荡器研究  

Study of Widely-tunable Mid-infrared Nd:YVO_4/PPMgLN Optical Parametric Oscillator

作　　者：林洪沂[1,2] 孟宪国[1,2] 黄晓桦[1,2] 蔡丽娥[1,2] 许英朝[1,2] 檀慧明[3] 

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024 [2]福建省高校光电技术重点实验室,福建厦门361024 [3]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《红外》2013年第4期38-42,共5页Infrared

基　　金：福建省教育厅A类科技项目(JA12248)

摘　　要：采用连续Nd:YVO_4激光器作为泵浦源,在室温下实现了PPMgLN晶体准相位匹配,获得了连续内腔光学参量振荡。获得的光参量阈值仅为3W(808nm);在泵浦光功率为5 W、PPMgLN极化周期为31.5μm时,获得了365 mW、2.95μm的中红外连续激光输出和312 mW、1.66μm信号光输出,总光光转换效率达到13.3%。通过改变晶体周期,实现了2.95～4.16μm闲频光和1.43～1.66μm信号光的宽带可调谐输出。此连续中红外光参量振荡器结构简单紧凑,效率高,将是未来产生3～5μm中红外激光光源的重要方法之一。By using a continuous wave （CW） Nd：YVO4 laser as the pump source, the quasi-phase match is implemented for a PPMgLN crystal at room temperature and a continuous intracavity optical parametric oscillator （OPO） is obtained. The optical parametric threshold obtained is only 3 W （808 nm）. For the pump power of 5 W and the period of PPMgLN crystal of 31.5 μm, both continuous mid-infrared laser output with the power of 365 mW at the wavelength of 2.95 pm and the signal laser output with the power of 312 mW at the wavelength of 1.66 μm are obtained. The total light conversion efficiency is up to 13.3%. By changing the periods of the crystal, the wide band tunable output of idle light in the spectral range from 2.95 μm to 4.16 μm and that of the signal light in the spectral range from 1.43 μm to 1.66 μm are obtained. This mid-infrared optical parametric oscillator is simple in structure and high in efficiency. It will be one of the important methods for producing 3-5 μm mid-infrared laser sources in the future.

关 键 词：中红外激光 单谐振光学参量振荡器 PPMGLN晶体 可调谐激光 

分 类 号：TN752[电子电信—电路与系统]