温度调谐ZnGeP_(2)长波红外光参量振荡器

Tunable long-wave infrared optical parametric oscillator based on temperature-adjustable ZnGeP_(2)

为了获得可调谐长波红外激光输出,本文设计了一种基于ZnGeP_(2)(ZGP)温度调谐的长波红外光参量振荡器。采用中心波长为2097 nm的Ho:YAG激光器泵浦不同相位匹配角的ZGP晶体,通过改变晶体工作温度来研究ZnGeP_(2)光参量振荡器(ZGP-OPO)的温度调谐特性。在15~30℃温度范围内,实现了7.53~8.77μm分段可调谐长波激光输出,总调谐宽度为1.24μm。整个调谐范围内,输出功率大于1.503 W,当闲频光波长为8.77μm时,输出功率为1.503 W,斜率效率和光光转换效率分别为12.19%和6.53%。实验结果表明,ZGP温度调谐是实现连续可调谐长波红外激光输出的有效技术途径。本实验研究在可调谐长波固体激光器工程化领域具有潜在的应用价值。

In order to realize tunable longwave infrared laser,we design a ZGP temperature tuned longwave infrared optical parametric oscillator.A Ho:YAG laser with the center wavelength of 2097 nm is used to pump ZGP crystals with different phase matching angles.The temperature adjustable properties of ZGP-OPO is researched by changing the operating temperature of crystal.The laser with a segment continuously tunable range of 7.53−8.77μm is realized in the temperature range of 15−30℃,with a total tuning range of 1.24μm.The output power of ZnGeP_(2)-Optical Parametric Oscillator(ZGP-OPO)is greater than 1.503 W over the entire tuning range.The output power is 1.503 W at the idler wavelength of 8.77μm,and the corresponding slope efficiency and optical conversion efficiency are 12.19%and 6.53%,respectively.The experimental results show that temperature tuning of ZGP is an effective technical method to obtain continuously tunable long-wave infrared laser.This research has potential application value in the field of engineering of tunable long-wave laser.