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A method to measure the Brillouin frequency shift of the medium through Brillouin amplification ratio
Authors:Hasi Wu-Li-Ji  L&#; Zhi-Wei  Li Qiang  and He Wei-Ming
Institution:Institute of Opto-electronics, Harbin Institute of Technology,Harbin 150001, China
Abstract:In order to measure the Brillouin frequency shift (BFS) of the medium, this paper proposes a method using mixtures in a two-cell stimulated Brillouin scattering system, which uses a medium to be measured as amplifier medium and a mixture medium as generator medium. The seed light from the generator gains effective amplification in the amplifier and the amplification ratio changes with the mixing fraction. Only when the BFS of the mixture medium is equal to that of the medium in the amplifier does the seed light obtain the maximum amplification ratio. The method has the advantage of independence of the wavelength of the incident light.
Keywords:stimulated Brillouin scattering  Brillouin frequency shift  liquid mixture
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