The 1.53-μm Lasing by SRS in Barium Nitrate in Focused Beams and in Resonator

摘要

Spatial-angular and spectral-energy characteristics of eye-safe lasing by SRS in barium nitrate, pumped by 1.32 μm Nd:YAG laser radiation in focused beams and resonator are studied. The pump-to-first-Stokes-component energy conversion factor 55% was obtained for lasing in resonator with single-mode pumping. With the multimode pumping essential gain in the lased radiation brightness compared with pump (beam clean-up) was received. It was shown that in the focused beams SRS take place in the wavefront replication mode. Thermal lens focal length in crystal was measured.