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Proceedings Paper

Phase-sensitive OTDR system based on digital coherent detection
Author(s): Zhengqing Pan; Kezhen Liang; Qing Ye; Haiwen Cai; Ronghui Qu; Zujie Fang
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Paper Abstract

The digital coherent detection method is employed into the φ-OTDR. The heterodyne detection offers very high optical gain while the digital signal processing serves as an effective tool to rebuild the instantaneous electric field of Rayleigh scattering light by analyzing the beating signal. Both amplitude and phase signal are obtained in our experiment. PZT vibration measurement verifies that the phase difference signal well represents the external perturbation signal and also with higher SNR. The proposed newφ-OTDR system shows a good application foreground in the area of distributed vibration measurement.

Paper Details

Date Published: 29 November 2011
PDF: 6 pages
Proc. SPIE 8311, Optical Sensors and Biophotonics III, 83110S (29 November 2011); doi: 10.1117/12.905657
Show Author Affiliations
Zhengqing Pan, Shanghai Institute of Optics and Fine Mechanics (China)
Kezhen Liang, Shanghai Institute of Optics and Fine Mechanics (China)
Qing Ye, Shanghai Institute of Optics and Fine Mechanics (China)
Haiwen Cai, Shanghai Institute of Optics and Fine Mechanics (China)
Ronghui Qu, Shanghai Institute of Optics and Fine Mechanics (China)
Zujie Fang, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8311:
Optical Sensors and Biophotonics III
Jürgen Popp, Editor(s)

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