Raman laser with intracavity conversion of 1.34-μm laser radiation in a BaWO4 crystal

Intracavity Raman conversion of 1.34-μm radiation of a Nd : YAG laser by a BaWO₄ crystal into the 1.53-μm first-Stokes component is studied in different operation regimes. In the case of passive Q-switching of the Nd : YAG laser, the SRS radiation has an average power of 0.28 W with a pulse train energy up to 5 mJ, an individual pulse duration of 19 ns, and a pump pulse repetition rate of 15 Hz. In the case of active Q-switching, the average SRS power is 0.85 W at a pulse energy up to 28 mJ, a pulse duration of 20 ns, and a pump pulse repetition rate of 30 Hz.