Frequency shifting of high power laser radiation by stimulated Raman scattering in crystals

Stimulated Raman scattering (SRS) has been observed in more than 100 crystals generating about 2000 different wavelengths covering the ultraviolet, visible and infrared spectral regions with a mean spacing of 1 nm. Barium nitrate crystals have been used to demonstrate high Raman shifted output energy up to 156 mJ or high average power of 10 W at 1.197 μm, 1.369 μm and 1.599 μ;m wavelengths with quantum efficiencies of up to 66 %.