Self-focusing versus stimulated Brillouin scattering of laser pulses in fused silica

Details Self-focusing versus stimulated Brillouin scattering of laser pulses in fused silica Self-focusing versus stimulated Brillouin scattering of laser pulses in fused silica

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12j3049m&link_type=abstract

New Journal of Physics, Volume 12, Issue 10, pp. 103049 (2010).

Physics

2

Scientific paper

The coupling between Kerr-induced filamentation and transient stimulated Brillouin scattering (SBS) is theoretically investigated for nanosecond laser pulses propagating in bulk silica. Power thresholds for beam collapse are evaluated by means of three-dimensional numerical simulations. It is shown that the nonlinear self-focusing of powerful pump waves is able to enhance the Stokes component to high fluence levels even if the incident beam exhibits a broad spectral bandwidth. In contrast, pump pulses with a few tens of picoseconds amplitude modulations drastically inhibit SBS.

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