A laser system is proposed for the application requirements for multi-wavelength laser sources in engineering practice,which wavelength can be switched freely among three kinds of wavelengths.The first wavelength switching was realized when the high-stability,high beam quality pump light passed through a wavelength switching device composed of an electro-optic crystal and a polarization beam splitting prism.When the signal and the idler outputted by the optical parametric oscillator went through the mechanically controlled optical traps,the second wavelength switching was realized.The broadband coating of laser combination mirror and the optical path folding technologies were adopted to finally realize the common-path three-wavelength laser free switching output.When the maximum average power of the pump light was 14 W,the total output power of the signal and the idler was 5.02 W,and the light-to-light conversion efficiency was 35.9 %.The output power instabilities of the three kinds of lasers were all less than 2 %.Both wavelength switching could be carried out over the full temperature range,with almost 100 % energy closure.Switching speeds were nanosecond and millisecond respectively.After continuous monitoring,the system could work for a long time with stable status and had the engineering application capability.
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赵志刚,谢安宁,王德飞,胡维星.三波长自由切换激光系统[J].激光与红外,2019,49(12):1431~1435 ZHAO Zhi-gang, XIE An-ning, WANG De-fei, HU Wei-xing. Three-wavelength free switchable laser system[J]. LASER & INFRARED,2019,49(12):1431~1435