期刊
INFRARED PHYSICS & TECHNOLOGY
卷 134, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.infrared.2023.104879
关键词
Mid-infrared; Widely tunable; High power; Optical parametric oscillator (OPO)
A high-power widely tunable nanosecond mid-infrared optical parametric oscillator using a ZnGeP2 crystal has been demonstrated. The optimized system parameters achieved high power output and a wide tuning range.
A high-power widely tunable nanosecond (ns) mid-infrared (mid-IR) optical parametric oscillator (OPO) in a ZnGeP2 crystal has been demonstrated. The OPO is pumped by a Q-switched 2.09 mu m Ho: YAG laser with 10 kHz repetition frequency. Based on optimizing the parameters of ZGP-OPO system, a maximum idler power as high as 5.47 W is achieved at 5.05 mu m with photon conversion efficiency of up to 46.4 %. By rotating the angle of the ZGP crystal, the idler tuning region across from 5 to 7.2 mu m is realized, with >1 W of idler power over almost the entire tuning region. The idler operation displays high pulse stability with peak to peak amplitude fluctuation less than +/- 2.8 % in near-Gaussian spatial mode.
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