| LI Yong-qian,LI Xiao-juan,FAN Han-bai,ZHANG Li-xin.A useful method for determination of optimal fiber input power in spontaneous Brillouin-scattering-based sensing system[J].Optoelectronics Letters,2018,14(1):53-56 |
| A useful method for determination of optimal fiber input power in spontaneous Brillouin-scattering-based sensing system |
| Author Name | Affiliation | | LI Yong-qian | Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China | | LI Xiao-juan | Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China
School of Information Technology, Hebei University of Economics and Business, Shijiazhuang 050061, China | | FAN Han-bai | Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China | | ZHANG Li-xin | Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China |
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| Abstract: |
| A method for the optimal fiber input power determination is presented by employing the variation characteristics of signal to noise ratio (SNR) in spontaneous Brillouin-scattering-based sensing system. And a heterodyne detection system is constructed for measuring the Brillouin scattering spectra with different fiber input powers. The Brillouin spectrum width and system SNR can be simultaneously measured from these spectra, and the optimal fiber input power can be obtained from such information. In the experiment, for 48.8-km-long standard single-mode fiber (SSMF), the optimal fiber input power values are all approximately 0 dBm obtained by the maximum SNR position for different local oscillator power values and average times. |
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