Duan Yanmin, Sun Yinglu, Zhu Haiyong, Mao Tingwei, Zhang Li, Chen Xiang
Opt Lett. 2020 May 1;45(9):2564-2567. doi: 10.1364/OL.392566.
We report switchable emission of visible light at five wavelengths generated in a $\text{YVO}_4$YVO cascaded Raman cavity driven by an acousto-optic ${Q}$Q-switched Nd:YAP laser at 1080 nm. The second-harmonic generation and sum-frequency generation of the fundamental, first-Stokes, and second-Stokes waves were realized based on the angle-tuned BBO crystal. The phase-match angle tuning span of a BBO crystal is only approximately 2.3° to allow the frequency mixing to produce five visible wavelengths on demand. At an absorbed pump power of 5.96 W and a pulse repetition frequency of 10 kHz, average output powers of 800, 340, 460, 190, and 326 mW were obtained for 539.9, 567.2, 597.4, 631.0, and 668.5 nm lasers, respectively. The results show that the cascaded Raman laser system with an angle-tuned BBO crystal can provide a convenient and efficient method to achieve wavelength-switchable visible emission for multi-wavelength laser applications.
我们报道了在由1080 nm声光调Q Nd:YAP激光器驱动的YVO₄级联拉曼腔中产生的五个波长的可见光可切换发射。基于角度调谐的BBO晶体实现了基波、一阶斯托克斯波和二阶斯托克斯波的二次谐波产生和和频产生。BBO晶体的相位匹配角调谐跨度仅约为2.3°，以便频率混合按需产生五个可见波长。在吸收泵浦功率为5.96 W和脉冲重复频率为10 kHz的情况下，539.9、567.2、597.4、631.0和668.5 nm激光器的平均输出功率分别为800、340、460、190和326 mW。结果表明，带有角度调谐BBO晶体的级联拉曼激光系统可为多波长激光应用实现波长可切换的可见光发射提供一种方便且高效的方法。
