Hanna, D.C. and Pacheco, M.T.T.
Higher Stokes order Raman conversion to the near IR: high efficiency and brightness via a capillary waveguide amplifier
Optics Communications, 60, (1-2), . (doi:10.1016/0030-4018(86)90128-8).
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Efficient Raman conversion in H2 gas from 0.53 µm to third Stokes (S3) at 1.58 µm has been demonstrated using an oscillator/amplifier configuration. Seed radiation from the oscillator controls the divergence of the Stokes beams and a capillary amplifier configuration enhances the conversion. An overall 9% photon conversion efficiency to S3 is achieved with the S3 beam divergence twice the diffraction limit. Photon conversion efficiency within the amplifier is ~20%.
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