Experimental and modeling studies of a Brillouin amplifier

Author

Offenberger, Allan A. ; Thompson, David C. ; Fedosejevs, Robert ; Harwood, B. ; Santiago, J. ; Manjunath, H.R.

Author_Institution

Dept. of Electr. Eng., Alberta Univ., Edmonton, Alta., Canada

Volume

29

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

207

Lastpage

216

Abstract

KrF laser-pumped backward Brillouin amplification of nanosecond pulses at 248 nm is investigated both experimentally and numerically. Gain and saturation of the amplifier system are studied for an SF₆ Brillouin medium at pressures of 5 to 15 atm and 24 ns pump pulses at an intensity of ≈9 MW/cm². The input Stokes intensity is varied from 0.001 to 1.0 MW/cm². Power gains of 20 are achieved at energy extraction efficiencies of 40%. Experimental results are compared to a time dependent numerical model of pulse amplification which incorporates arbitrary pump and Stokes pulse shapes and intensities. The effect of laser bandwidth is investigated in the model calculations in order to assess its influence on Brillouin amplification

Keywords

optical pumping; stimulated Brillouin scattering; sulphur compounds; 248 nm; 40 percent; KrF; KrF laser-pumped backward Brillouin amplification; SF₆; SF₆ Brillouin medium; Stokes pulse shapes; energy extraction efficiencies; input Stokes intensity; laser bandwidth; nanosecond pulses; power gains; pulse amplification; pump pulses; saturation; stimulated backward Brillouin scattering; time dependent numerical model; Brillouin scattering; Laser beams; Laser fusion; Laser modes; Optical beams; Optical pulse generation; Optical pulses; Power lasers; Pulse amplifiers; Pulse compression methods;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.199261

Filename

199261