Gao Xiao Qiang, Long Ming Liang, Meng Chen
Appl Opt. 2016 Aug 20;55(24):6554-8. doi: 10.1364/AO.55.006554.
We demonstrate an efficient approach to realizing an extra-cavity, synchronously pumped, stimulated Raman cascaded process under low repetition frequency (1 kHz) pump conditions. We also construct a compact KGd(WO) (KGW) crystal picosecond Raman laser that has been configured as the developed method. A pulse-train green laser pumped the corresponding 70 mm long KGW crystal Raman cavity. The pulse train contains six pulses, about 800 ps separated, for every millisecond; thus, it can realize synchronous pumping between pump pulse and the pumped Raman cavity. The investigated system produced a collinear Raman laser output that includes six laser lines covering the 532 to 800 nm spectra. This is the first report on an all-solid-state, high-average-power picosecond collinear multi-wavelength (more than three laser components) laser to our knowledge. This method has never been reported on before in the synchronously pumped stimulated Raman scattering (SRS) realm.
我们展示了一种在低重复频率（1千赫兹）泵浦条件下实现腔外同步泵浦受激拉曼级联过程的有效方法。我们还构建了一台紧凑的KGd(WO)（KGW）晶体皮秒拉曼激光器，其已按照所开发的方法进行配置。一列脉冲绿光泵浦了相应的70毫米长的KGW晶体拉曼腔。该脉冲序列每毫秒包含六个脉冲，彼此间隔约800皮秒；因此，它能够实现泵浦脉冲与被泵浦拉曼腔之间的同步泵浦。所研究的系统产生了共线拉曼激光输出，其中包括覆盖532至800纳米光谱的六条激光线。据我们所知，这是关于全固态、高平均功率皮秒共线多波长（超过三个激光分量）激光器的首次报道。此前在同步泵浦受激拉曼散射（SRS）领域从未有过这种方法的报道。
