Abstract
We have studied stimulated Raman (SRS) conversion to the first Stokes component of multimode (M2 = 8) radiation from a YAG:Nd laser with lasing wavelengths of 1.319 µm, 1.338 µm, and 1.357 µm in a barium nitrate crystal. We have obtained pulses of converted radiation with energies up to 120 mJ. We have achieved conversion efficiencies greater than 40% for each of the three Raman laser wavelengths of 1.530 µm, 1.556 µm, and 1.582 µm with divergence of the beams of converted radiation close to the diffraction-limited value (M2 < 1.5).
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