Laser pulse compression method to measure Brillouin gain in water |
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| Authors: | Jiulin Shi Hongpeng Wang Jiacheng Qian Juan Liu |
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| Affiliation: | 1. Key Laboratory of Nondestructive Test, Ministry of Education, Nanchang Hangkong University, Nanchang, Chinarandynuc@nchu.edu.cn;3. Key Laboratory of Nondestructive Test, Ministry of Education, Nanchang Hangkong University, Nanchang, China |
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| Abstract: | We present a method by which to determine the gain coefficient of stimulated Brillouin scattering (SBS) in water from the pulse compression ratio of the pump pulse duration to the output Stokes pulse duration. To achieve this objective, we have measured the pulse duration of SBS over the temperature range of 5–40 °C. The gain coefficient of SBS has been calculated using the measured pulse compression ratio, the pump intensity, and the characteristic length. Also, in this article, we derive the theoretical model based on coupled wave equations and we demonstrate the method at lower pump energies which is an effective approach for measuring the gain coefficient of SBS. |
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| Keywords: | SBS pulse compression gain coefficient |
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