Optimization of stimulated Raman scattering with astigmatic lenses

Johan C. van den Heuvel; Frank J. M. van Putten; R. J. L. Lerou

doi:10.1117/12.165620

5 January 1994 Optimization of stimulated Raman scattering with astigmatic lenses

Johan C. van den Heuvel, Frank J. M. van Putten, R. J. L. Lerou

Proceedings Volume 2041, Mode-locked and Other Ultrashort Laser Designs, Amplifiers, and Applications; (1994) https://doi.org/10.1117/12.165620
Event: Optics Quebec, 1993, Quebec City, Canada

Abstract

The conversion efficiency of a Raman cell at high pump energies has been increased with an astigmatic focus. Experimental and numerical results show that the increased conversion is due to the reduction of cascade second order Stokes. For our experimental setup, it is shown that other effects, namely Brillouin scattering, anti-Stokes generation, and ground-state depletion, are negligible. Another important advantage of an astigmatic focus is the reduced risk of optical breakdown due to the lower intensity at the focus with only a small gain reduction. Good agreement was found between experimental and numerical results. In particular, the pump energy where the conversion for an ordinary focus is identical to an astigmatic focus is reproduced by the calculations.

Citation Download Citation

Johan C. van den Heuvel, Frank J. M. van Putten, and R. J. L. Lerou "Optimization of stimulated Raman scattering with astigmatic lenses", Proc. SPIE 2041, Mode-locked and Other Ultrashort Laser Designs, Amplifiers, and Applications, (5 January 1994); https://doi.org/10.1117/12.165620

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