中国激光, 2010, 37 (9): 2303, 网络出版: 2010-08-19
基于PPMgLN的中红外全固态可调谐光学参量振荡器
Mid-Infrared Tunable All-Solid-State Optical Parametric Oscillator Based on PPMgLN
激光器 光学参量振荡器 PPMgLN晶体 中红外可调谐激光器 连续和脉冲激光输出 lasers optical parametric oscillator PPMgLN crystal mid-infrared tunable laser continuous wave and pulse output
摘要
采用Nd:YVO4固体激光器的1064 nm波长作为抽运源,在室温下实现了PPMgLN晶体准相位匹配的光学参量振荡器(OPO)输出。在连续工作模式下,OPO的抽运阈值为1.1 W,并在8.75 W的1064 nm连续抽运下获得了905 mW的3.2 μm闲频光输出;在主动调Q的工作模式下,由平均功率为6.6 W的1064 nm脉冲激光抽运,获得了1.13 W 的中红外波段闲频光输出,光光转换效率达到17%。采用平均功率为1.15 W的Cr:YAG被动调Q的1064 nm脉冲激光抽运,获得了125 mW 的中红外脉冲激光输出。通过改变晶体的极化周期,实现了闲频光3.13-4.20 μm中红外宽带可调谐的连续和脉冲激光输出,并在主动调Q脉冲激光作为抽运光源时,测量了相应OPO的分立输出光谱、波长调谐间隔和光谱带宽。
Abstract
An optical parametric oscillator (OPO),which is pumped by a Nd:YVO4 laser with the 1064 nm wavelength,is obtained based on PPMgLN.For the continuous wave (CW) operation mode,the threshold is only 1.1 W and the output power of idler at 3.2 μm is 905 mW.For the active Q-switched operation mode,the average output power at mid-infrared wavelength is 1.13 W,which corresponds to an optical-optical conversion efficiency of 17%.For the passively Q-switched operation mode with a Cr:YAG saturable absorber in the cavity of Nd:YVO4 laser,the average output power of idler from OPO at the mid-infrared wavelength is 125 mW.By changing the periods of the domain structure on the PPMgLN wafer,a widely tunable mid-infrared spectrum from 3.13to 4.20 μm is obtained.
檀慧明, 林洪沂, 张搏麟. 基于PPMgLN的中红外全固态可调谐光学参量振荡器[J]. 中国激光, 2010, 37(9): 2303. Tan Huiming, Lin Hongyi, Zhang Bolin. Mid-Infrared Tunable All-Solid-State Optical Parametric Oscillator Based on PPMgLN[J]. Chinese Journal of Lasers, 2010, 37(9): 2303.
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