Brillouin optical time domain reflectometry for fast detection of dynamic strain incorporating double-edge technique

OPTICS COMMUNICATIONS

卷:398

Article

Shangguan, Mingjia^1,2,3,5  Wang, Chong³  Xia, Haiyun^3,4,5  Shentu, Guoliang^1,2,5  Dou, Xiankang³  Zhang, Qiang^1,2,5,6  Pan, Jian-wei^1,2,5 

[1] USTC, Shanghai Branch, Natl Lab Phys Sci Microscale, Shanghai 201315, Peoples R China

[2] USTC, Dept Modern Phys, Shanghai 201315, Peoples R China

[3] USTC, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China

[4] HIT, Collaborat Innovat Ctr Astronaut Sci & Technol, Harbin 150001, Peoples R China

[5] USTC, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China

[6] Jinan Inst Quantum Technol, Jinan 250101, Shandong, Peoples R China

关键词: Brillouin optical time-domain reflectometry;    Up-conversion technique;    Fabry-Perot interferometer;   

DOI  :  10.1016/j.optcom.2017.04.033

来源: Elsevier

【 摘 要 】

For the first time, to the best of our knowledge, a direct detection Brillouin optical time-domain refiectometry (BOTDR) is demonstrated for fast distributed dynamic strain sensing incorporating double-edge technique, time-division multiplexing technique and upconversion technique. In order to guarantee the robust stability of the system, the double-edge technique is implemented by using a convert single-channel FPI and a fiber coupled upconversion single-photon detector, incorporating a time-division multiplexing method. The upconversion single-photon detector is adopted to upconvert the backscattering photons from 1548.1 nm to 863 nm, which is subsequently detected by a Silicon avalanche photodiode (Si-APD). In the experiment, dynamic strain disturbance up to 1.9 m epsilon over 1.5 km of a polarization maintaining fiber is detected at a sampling rate of 30 Hz. An accuracy of +/- 30 mu epsilon and spatial resolution of 0.6 m are realized.

【 授权许可】

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