Abstract
To investigate the full conversion of pump power to the Stokes waves in stimulated Raman scattering with a single-pass cell, unconverted pump energies have been analyzed in detail in relation to the first Stokes, second Stokes and first anti-Stokes energies. Adoption of a long focusing configuration with a high-pressure cell was found to be effective but insufficient to suppress the four-wave mixing effect, because a small amount of pump energy always remained undepleted. Comparison of the results using pump beams of various spectral and spatial mode characteristics from alexandrite and Nd:YAG lasers revealed that the spatial mode quality was the most critical parameter for full depletion of a pump pulse.
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Lay, T.T., Wada, S., Tashiro, H. et al. Relation of pump-beam quality and conversion efficiency in the Raman downward conversion. Appl. Phys. B 62, 59–64 (1996). https://doi.org/10.1007/BF01081248
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DOI: https://doi.org/10.1007/BF01081248