0.9-W Raman oscillator

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Abstract
Substantial average output powers have been achieved from a Raman oscillator operating at kHz pulse repetition frequencies (PRF’s). The Raman oscillator is composed of a lithium iodate crystal placed inside a Nd : YAlO3 laser; feedback is provided at the Stokes wavelengths by means of mirrors surrounding the crystal. In separate experiments, we have obtained 900‐mW average output power from the 1.18‐μm first Stokes line at a 3.2‐kHz PRF, and 200 mW average output power from the 1.31‐μm second Stokes line at a 1‐kHz PRF. Pulse lengths were approximately 6 and 2 ns for the 1.18‐ and 1.31‐μm outputs, respectively.

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