Fig. 4
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Stimulated Brillouin gain spectrum of liquid acetone at room temperature measured in a confined spatio-temporal domain (30 μm, 170 ns). (a) Ω < 0; (b) Ω > 0. Crosses: experimental data and corresponding error bars; solid curve: fit according to equation (3). Pump and probe lasers central optical wavelength is 1064 nm and their crossing angle is ~ 90°.
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