Reaching nonlinear regime in Raman amplification of ultrashort laser pulses

In this paper, we present, for the first time, clear evidence of reaching the nonlinear regime of Raman Backscattering (RBS) amplification with pulse intensity amplification exciting 1000 in 2 mm long plasma and exciting pump intensity by more than order of magnitude. We have demonstrated energy amp...

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Bibliographic Details
Published in2005 Quantum Electronics and Laser Science Conference Vol. 1; pp. 35 - 37 Vol. 1
Main Authors Cheng, W., Avitzour, Y., Ping, Y., Suckewer, S., Fisch, N.J., Hur, M.S., Wurtele, J.S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Backscatter
Bandwidth
Laser beams
Laser excitation
Optical pulses
Plasma density
Plasma measurements
Pulse amplifiers
Pulse measurements
Stimulated emission
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Summary:In this paper, we present, for the first time, clear evidence of reaching the nonlinear regime of Raman Backscattering (RBS) amplification with pulse intensity amplification exciting 1000 in 2 mm long plasma and exciting pump intensity by more than order of magnitude. We have demonstrated energy amplification of up to /spl sim/5000 for a seed with a low input energy (<0.2 pJ) and up to /spl sim/60 for a seed with high input energy (7.5 pJ). The output energy grew exponentially when the input was low and the gain indicated "saturation" when the input was high.
ISBN:1557527962
9781557527967
DOI:10.1109/QELS.2005.1548666