Study on the phase of interference signal in phase extraction based phase-sensitive optical time domain reflectometry

Chaoli Liang; Yang Lu; Xueliang Zhang; Mo Chen; Jianfei Wang; Zhou Meng

doi:10.1117/12.2504872

15 November 2018 Study on the phase of interference signal in phase extraction based phase-sensitive optical time domain reflectometry

Chaoli Liang, Yang Lu, Xueliang Zhang, Mo Chen, Jianfei Wang, Zhou Meng

Author Affiliations +

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 1096411 (2018) https://doi.org/10.1117/12.2504872
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

In a phase extraction based phase-sensitive optical time domain reflectometry (Φ-OTDR), external perturbation induced phase variation of Rayleigh backscattered light-wave (RBL) is obtained from time varying interference signal that is comprised of two RBLs with a spatial shift along the sensing fiber. In this paper, the phase of the interference signal in the phase extraction based Φ-OTDR is studied. Derivation is performed on the interference signal considering the interference of multiple RBL within probe pulse covered fiber section. Theoretical analysis and experimental results reveal that the phase of interference signal are wavelength independent while the intensity of interference signal are wavelength dependent.

Citation Download Citation

Chaoli Liang, Yang Lu, Xueliang Zhang, Mo Chen, Jianfei Wang, and Zhou Meng "Study on the phase of interference signal in phase extraction based phase-sensitive optical time domain reflectometry", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 1096411 (15 November 2018); https://doi.org/10.1117/12.2504872

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