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Proceedings Paper

Phase conjugation at SBS of CPA-modulated profiled laser pulses
Author(s): Gennady G. Kochemasov; Fedor A. Starikov; Vladimir K. Ladagin; V. A. Eroshenko
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Paper Abstract

The calculations of the phase conjugation at the stimulated Brilloiun scattering (SBS) of the laser pulse specific for such powerful laser facilities as NIF, MEGAJOULE, ISKRA-6 are carried out. A computer code based on the most complete in literature physical and numerical model of non-steady- state SBS is applied for this purpose. Transient processes and an effect of Stokes field on laser one (the laser pump depletion) are included. The possibility is demonstrated of obtaining the phase conjugation of the profiled laser pulse with temporal phase CPA modulation needed for ICF experiments in order to replace an adaptive mirror in multi- pass laser scheme by an SBS mirror. The laser spectral line width is greatly larger than the SBS spectral line width. It is obtained that the phase conjugation of broad-band laser focused beam with the complicated temporal power profile is feasible. When a minimal laser coherence length scale (dealt with an inverse width of spectral line) is more than or of order of a beam waist length, the Stokes beam is characterized by the high phase conjugation quality that is about 97%. At the enhancement of the laser modulation frequency, when the coherence length is shorter than the beam waist length by 10 times, the phase conjugation fidelity reduces to 80% and the SBS threshold rises.

Paper Details

Date Published: 14 April 2000
PDF: 11 pages
Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); doi: 10.1117/12.382780
Show Author Affiliations
Gennady G. Kochemasov, Russian Federal Nuclear Ctr. (Russia)
Fedor A. Starikov, Russian Federal Nuclear Ctr. (Russia)
Vladimir K. Ladagin, Russian Federal Nuclear Ctr. (Russia)
V. A. Eroshenko, Russian Federal Nuclear Ctr. (Russia)

Published in SPIE Proceedings Vol. 3929:
Solid State Lasers IX
Richard Scheps, Editor(s)

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