首次搭建了基于ZnWO4/Nd∶YAG的一阶斯托克斯拉曼激光器,并研究了其在不同重复频率与不同输出耦合镜下的输出特性。采用ZnWO4晶体作为拉曼晶体,二极管泵浦Nd∶YAG晶体产生基频光,实现了波长为1177.6 nm的一阶斯托克斯激光输出。当输出耦合镜的透过率为35%,泵浦功率为22.1 W,重复频率9 kHz时,在1177.6 nm处获得了最大平均输出功率,为886 mW,对应的最短脉宽为2.2 ns,峰值功率为43.9 kW。

In this work, a first-Stokes Raman lasers based on ZnWO4/Nd∶YAG was constructed for the first time. The output characteristics of the lasers under different repetition frequencies and with different output couplers were studied. Using ZnWO4 crystal as the Raman crystal and diode-pumped Nd∶YAG crystal to produce the fundamental laser, the first-Stokes laser at 1177.6 nm was realized. A maximum average output power of 886 mW at the first-Stokes wavelength of 1177.6 nm is obtained for output coupling mirror transmittance of 35%, pump power of 22.1 W, and repetition frequency of 9 kHz. Moreover, the corresponding pulse width and output peak power are 2.2 ns and 43.9 kW, respectively.