三波长自由切换激光系统
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Three-wavelength free switchable laser system
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    摘要:

    针对工程应用中对多波长激光源的使用需求,提出了一种可自由切换三种波长输出的激光系统。高稳定、高光束质量抽运源通过由电光晶体和偏振分光棱镜组成的波长切换装置,实现首次波长切换;光参量振荡器输出的闲频光和信号光通过由机械调控的光学陷阱实现二次波长切换;再采用光路折叠和合束镜多波段镀膜技术,最终实现共光路三波长激光自由切换输出。当抽运功率为14 W时,信号光和闲频光功率超过5 W,光光转换效率为35.9 %。三种激光的输出功率不稳定度均小于2 %。两次波长切换都可在全温度范围内进行,能量关闭程度接近100 %,切换速度分别为纳秒级和毫秒级。经过监测,系统能够长时间稳定工作,具备工程应用能力。

    Abstract:

    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

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  • 在线发布日期: 2019-12-24
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