A new method for measuring the threshold of stimulated Brillouin scattering

doi:10.1088/1674-1056/21/7/074205

Abstract A new method for measuring the threshold of stimulated Brillouin scattering (SBS) based on the generation location of Stokes beam is proposed for the first time to our knowledge. The length of the medium cell is selected to be longer than the free gain length of pump pulses in the Brillouin medium. The reflected light from a certain mirror in front of the medium cell is chosen as the reference beam, and the SBS threshold is measured by the ''jump'' of the delay between the Stokes beam and the reference beam. An 8-ns Q-switched single-longitudinal-mode pulse is used as the pump and the typical SBS medium FC-72 is selected as the nonlinear medium in our experiment. The SBS threshold intensity is measured to be 173--178 mW/cm², which is consistent with existing results measured with the transmitted energy limiting method.

Keywords: stimulated Brillouin scattering (SBS) threshold amplified Brillouin scattering (ABS) delay

Received: 20 November 2011
Revised: 05 January 2012
Accepted manuscript online:

PACS:	42.65.-k	(Nonlinear optics)
	42.65.Es	(Stimulated Brillouin and Rayleigh scattering)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61008005 and 61138005), the China Postdoctoral Science Special Foundation (Grant No. 201003428), and the Doctoral Fund of Ministry of Education of China (Grant No. 20102302120030).

Corresponding Authors: Lü Zhi-Wei
E-mail: zw_lu@sohu.com

Cite this article:

Zhu Xue-Hua(朱学华), LŰ Zhi-Wei(吕志伟) and Wang Yu-Lei(王雨雷) A new method for measuring the threshold of stimulated Brillouin scattering 2012 Chin. Phys. B 21 074205

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