A method to measure the Brillouin frequency shift of the medium through Brillouin amplification ratio |
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Authors: | Hasi Wu-Li-Ji L Zhi-Wei Li Qiang and He Wei-Ming |
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Institution: | Institute of Opto-electronics, Harbin Institute of Technology,Harbin 150001, China |
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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. |
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Keywords: | stimulated Brillouin scattering Brillouin frequency shift liquid mixture |
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