利用腔内 PPMgLN 光参量振荡器产生高平均功率 2 μm 激光。

High average power 2 μm generation using an intracavity PPMgLN optical parametric oscillator.

机构信息

State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China.

出版信息

Opt Lett. 2012 Jan 1;37(1):64-6. doi: 10.1364/OL.37.000064.

DOI:10.1364/OL.37.000064

PMID:22212792

Abstract

An intracavity quasi-phase-matched optical parametric oscillator (OPO) has been developed for the purpose of generating radiation with high average power and high repetition rate in the 2 μm regime. The device is a degenerate OPO based on a 3 mm thick MgO-doped periodically poled LiNbO(3) (PPMgLN) crystal, which is pumped in turn within the cavity by a diode side-pumped, Q-switched 1 μm Nd:YAG laser operating at 10 kHz. Up to 20 W broadband 2 μm radiation can be generated with a compact configuration under the crystal temperature of 115 °C. The beam profile is close to circularly symmetric with M(2) ~ 10.

摘要

已经开发出一种腔内准相位匹配光参量振荡器（OPO），用于在 2 μm 波段产生高平均功率和高重复率的辐射。该器件是基于 3 毫米厚掺镁周期性极化铌酸锂（PPMgLN）晶体的简并 OPO，由二极管侧面泵浦、10 kHz 重复频率的调 Q 1 μm Nd：YAG 激光器在腔内依次泵浦。在晶体温度为 115°C 的情况下，采用紧凑的配置可产生高达 20 W 的宽带 2 μm 辐射。光束轮廓接近圆对称，M(2)~10。