Backscatter-based distributed fiber-optic vibration system
A distributed optical fiber and backscattering technology, applied in the direction of using wave/particle radiation, measuring devices, instruments, etc., can solve the problems of long production cycle, high price, difficult maintenance, etc., and achieve the effect of reducing requirements
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[0014] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0015] Please refer to Fig. 2, the present invention relates to a kind of distributed optical fiber vibration system based on backscattering, it comprises sub-narrow line width high-power pulse light source (D1), 2 * 2 coupler (D2), sensing optical cable (D3) and Reference optical cable (D4), polarization splitter (D5), photodetector 1 (D6) and photodetector 2 (D7), A / D converter and data processor (D8).
[0016] The output end of the sub-narrow linewidth high-power pulse light source (D1) is connected to the first port of the primary stage of the 2×2 coupler (D2), and the secondary stage of the 2×2 coupler (D2) is respectively connected to the sensing optical cable (D3) and the reference optical cable ( D4); the other port of the main stage of the coupler is connected to the polarization splitter (D5), and the output end of the polarization ...
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