基于MgO∶PPLN晶体差频产生的宽调谐中红外连续激光光源

分别以1 083 nm和1 550 nm波段的窄线宽连续光源为泵浦光和信号光, 搭建基于掺MgO周期铌酸锂晶体(MgO∶PPLN)准相位匹配原理的差频非线性效应产生中红外激光实验系统.根据系统温度和信号光波长调谐特性进行实验研究.在泵浦光波长固定条件下改变信号光波长, 实现了窄线宽宽调谐中红外连续闲频激光输出, 波长覆盖范围为3 547.6~3 629.1 nm.当波长为1 082.8 nm的泵浦光和波长为1 549.7 nm的信号光功率分别放大到2.8 W和3.5 W时, 对波长为3 597.0 nm的中红外闲频光输出进行长时间功率扫描监测, 得到最大功率为3.2 mW, 功率抖动引起不稳定度小于±1.6%的高稳定的中红外窄线宽激光输出.该研究结果可为设计和研制多波长窄线宽中红外光源提供参考.

Abstract

The continuous-wave Mid-Infrared Radiation(Mid-IR) was experimentally obtained by difference frequency quasi-phase-matching in a MgO-doped periodically poled LiNbO3 crystal (MgO∶PPLN), which the narrow linewidth light sources with 1 083 nm and 1 550 nm were used as pump light and signal light,respectively. Moreover, the multiple mid-IR wavelengths were realized by adjusting the signal wavelength and using the temperature controlling on a MgO∶PPLN. The wavelength tuning region is around 3 547.6 nm to 3 629.1 nm. A maximum mid-infrared radiation power of 3.2 mW at 3 597.0 nm is generated when the optical power of signal and pump lights are amplified to 3.5 W and 2.8 W respectively. The power jitter of mid-infrared output is less than ±1.6% after along time test recording. This study can be used as a reference for the design and development of narrow line width multi-wavelength continuous-wave infrared light source.

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张泽宇, 朱国申, 汪伟, 段弢, 杨松, 郝强, 韩彪, 谢小平, 曾和平. 基于MgO∶PPLN晶体差频产生的宽调谐中红外连续激光光源[J]. 光子学报, 2016, 45(9): 0914003. ZHANG Ze-yu, ZHU Guo-shen, WANG Wei, DUAN Tao, YANG Song, HAO Qiang, HAN Biao, XIE Xiao-ping, ZENG He-ping. Difference Frequency Generation Wildly Tunable Continuous Wave Mid-infrared Radiation Laser Source Based on a MgO∶PPLN Crystal[J]. ACTA PHOTONICA SINICA, 2016, 45(9): 0914003.

基于MgO∶PPLN晶体差频产生的宽调谐中红外连续激光光源

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