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Measurement of stimulated Brillouin scattering threshold by the optical limiting of pump output energy

Published online by Cambridge University Press:  14 April 2010

W. Gao ,
Z.W. Lu ,
S.Y. Wang ,
W.M. He  and
W.L.J. Hasi
W. Gao
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China Department of Optics information Science and Technology, Harbin University of Science and Technology, Harbin 150001, China
Z.W. Lu*
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
S.Y. Wang
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
W.M. He
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
W.L.J. Hasi
Affiliation:
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China
*
Address correspondence and reprint requests to: Zhiwei Lu, Institute of Opto-Electronics, Harbin Institute of Technology, P. O. Box 3031. Harbin 150080, China. E-mail: zw_lu@sohu.com
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Abstract

A new approach to measure stimulated Brillouin scattering threshold based on the output energy characteristic of stimulated Brillouin scattering optical limiting is proposed. The stimulated Brillouin scattering threshold or its exponential gain, Gth, can be accurately and conveniently determined by the intersection point of linear-fitting lines of the output energy below and above the threshold. The values of Gth in CS2 and FC-72 for different wavelengths and interaction lengths are measured in Continuum's Nd:YAG Q-switched laser and its frequency-doubled system. We show that Gth for transient regime is larger than that for steady state, and increases with the pump wavelength and the interaction length.

Keywords

Stimulated Brillouin scatteringSBS optical limitingSBS thresholdThreshold exponential gain
Type
Research Article
Information
Laser and Particle Beams , Volume 28 , Issue 1 , March 2010 , pp. 179 - 184
Copyright
Copyright © Cambridge University Press 2010

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