Reaching nonlinear regime in Raman amplification of ultrashort laser pulses

Author

Cheng, Weifeng ; Avitzour, Yoav ; Ping, Yuan ; Suckewer, Szymon ; Fisch, Nathaniel J. ; Hur, Min S. ; Wurtele, Jonathan S.

Author_Institution

Princeton Univ., NJ, USA

Volume

1

fYear

2005

fDate

22-27 May 2005

Firstpage

35

Abstract

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 ∼5000 for a seed with a low input energy (<0.2 pJ) and up to ∼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.

Keywords

Raman spectra; backscatter; high-speed optical techniques; laser beams; optical pumping; plasma density; plasma light propagation; 2 mm; 7.5 pJ; Raman amplification; Raman backscattering amplification; energy amplification; nonlinear regime; plasma; pulse intensity amplification; pump intensity; ultrashort laser pulse; Backscatter; Bandwidth; Laser beams; Laser excitation; Optical pulses; Plasma density; Plasma measurements; Pulse amplifiers; Pulse measurements; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2005. QELS '05

Print_ISBN

1-55752-796-2

Type

conf

DOI

10.1109/QELS.2005.1548666

Filename

1548666