Gao Feilong, Zhang Xingyu, Cong Zhenhua, Liu Zhaojun, Chen Xiaohan, Qin Zengguang, Wang Peng, Xu Jinjin
Opt Lett. 2020 Feb 15;45(4):861-864. doi: 10.1364/OL.383885.
Stimulated polariton scattering (SPS) and stimulated Raman scattering (SRS) in ${{\rm RbTiOPO}_4}$RbTiOPO (RTP) crystal are combined in an intracavity-pumped Stokes parametric oscillator (SPO) to extend the tunable Stokes laser spectral range. The pumping laser wavelength is 1064 nm from a diode-end-pumped acousto-optically Q-switched Nd:YAG laser. By the SPS process in the SPO, the SPS-Stokes wave can be discontinuously tuned in the range of 1075.7-1076.0 nm, 1077.7-1080.4 nm, 1081.8-1082.2 nm, and 1084.8-1087.8 nm, respectively. By the following SRS process in the same RTP crystal, the laser wavelength is further shifted in the range of 1107.7-1108.1 nm, 1109.0-1112.7 nm, 1114.3-1115.1 nm, and 1117.8-1121.1 nm, respectively. A maximal average output power of 970 mW is achieved for the SRS-Stokes wave at the peak wavelength of 1118.8 nm. It is obtained when the diode power is 7.9 W, and the pulse repetition frequency (PRF) is 10 kHz.
在腔内泵浦的斯托克斯参量振荡器（SPO）中，将${\rm RbTiOPO}_4$（RTP）晶体中的受激极化激元散射（SPS）和受激拉曼散射（SRS）相结合，以扩展可调谐斯托克斯激光的光谱范围。泵浦激光波长为1064 nm，来自二极管端面泵浦声光调Q的Nd:YAG激光器。通过SPO中的SPS过程，SPS - 斯托克斯波可分别在1075.7 - 1076.0 nm、1077.7 - 1080.4 nm、1081.8 - 1082.2 nm和1084.8 - 1087.8 nm范围内进行非连续调谐。通过在同一RTP晶体中随后的SRS过程，激光波长进一步分别在1107.7 - 1108.1 nm、1109.0 - 1112.7 nm、1114.3 - 1115.1 nm和1117.8 - 1121.1 nm范围内移动。在峰值波长1118.8 nm处，SRS - 斯托克斯波实现了970 mW的最大平均输出功率。当二极管功率为7.9 W且脉冲重复频率（PRF）为10 kHz时获得该功率。
