Zhu Haiyong, Guo Junhong, Duan Yanmin, Zhang Jing, Zhang Yongchang, Xu Changwen, Wang Hongyan, Fan Dianyuan
Opt Lett. 2018 Jan 15;43(2):345-348. doi: 10.1364/OL.43.000345.
An intra-cavity optical parametric oscillator (OPO) emitting at 1.7 μm derived by Nd:YVO self-Raman laser is demonstrated in this Letter, with a KTiOAsO (KTA) crystal used as nonlinear optical crystal. A laser diode end-pumped acousto-optic Q-switched Nd:YVO self-Raman laser at 1176 nm was employed as the pump source. At an incident pump power of 12.1 W and a pulse repetition frequency of 60 kHz, average output power up to 1.2 W signal light at 1742 nm was obtained, with diode-to-signal conversion efficiency of 10%. The pulse width was about 11 ns and spectral line width was less than 0.5 nm for the signal light. The results show that compact intra-cavity KTA-OPO derived by Nd:YVO self-Raman laser is an efficient method for 1.7 μm waveband laser generation, with potential applications in biological imaging, laser therapy, special materials processing, etc.
本文展示了一种由Nd:YVO自拉曼激光器产生的1.7μm腔内光参量振荡器（OPO），其中使用KTiOAsO（KTA）晶体作为非线性光学晶体。采用激光二极管端面泵浦声光调Q的1176nm Nd:YVO自拉曼激光器作为泵浦源。在12.1W的入射泵浦功率和60kHz的脉冲重复频率下，获得了高达1.2W的1742nm信号光平均输出功率，二极管到信号的转换效率为10%。信号光的脉冲宽度约为11ns，谱线宽度小于0.5nm。结果表明，由Nd:YVO自拉曼激光器产生的紧凑型腔内KTA-OPO是产生1.7μm波段激光的有效方法，在生物成像、激光治疗、特殊材料加工等方面具有潜在应用。
