中国激光, 2007, 34 (2): 209, 网络出版: 2007-02-26
周期极化掺镁铌酸锂晶体的光学参量振荡
Optical Parametric Oscillator Based on Periodically Poled MgO:LiNbO3 Crystal
非线性光学 光学参量振荡器 周期极化掺镁铌酸锂晶体 温度调谐 准相位匹配 nonlinear optics optical parametric oscillator periodically poled MgO:LiNbO3 crystal temperature tunable quasi-phase matched
摘要
采用短脉冲极化电场法, 在1 mm厚的掺摩尔分数0.05镁的铌酸锂晶体上成功制备了周期为30 μm的极化光栅。以输出波长为1.064 μm的声光调Q Nd:YAG固体激光器作为基频抽运源对其进行了光学参量振荡实验, 光参量振荡阈值功率为45 mW(重复频率为1 kHz), 在输入功率为490 mW, 控温炉温度为160 ℃时, 获得了94 mW的波长为1544 nm的信号光输出, 转换效率达到19.2%。并且通过调谐晶体温度(20～180 ℃), 获得了调谐范围为1503～1550 nm的信号光稳定输出。实现了可调谐红外光的稳定输出, 验证了晶体周期结构的均匀性。
Abstract
By using short-pulse field, the periodically poled grating (Λ=30 μm) was successfully fabricated in 1 mm thick MgO:LiNbO3 (doped 5 mol% MgO). A high-repetition-rate optical parametric oscillator (OPO) experiment based on periodically poled MgO:LiNbO3 crystal (PPMgLN) pumped by a 1.064 μm acousto-optically Q-switched Nd:YAG laser was performed. The threshold is 45 mW with 1 kHz pulse repetition rate. Under the condition of 490 mW of input pump power and at 160 ℃, 94 mW of output signal power was obtained, and the conversion efficiency is 19.2%. Furthermore a tunable infrared ( IR) stable output from 1503 nm to 1550 nm was obtained by tuning the temperature of PPMgLN from 20 ℃ to 180 ℃.
姚江宏, 薛亮平, 颜博霞, 贾国治, 许京军, 张光寅. 周期极化掺镁铌酸锂晶体的光学参量振荡[J]. 中国激光, 2007, 34(2): 209. 姚江宏, 薛亮平, 颜博霞, 贾国治, 许京军, 张光寅. Optical Parametric Oscillator Based on Periodically Poled MgO:LiNbO3 Crystal[J]. Chinese Journal of Lasers, 2007, 34(2): 209.
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