Phase-sensitive OTDR system based on digital coherent detection

Author

Pan, Zhengqing ; Liang, Kezhen ; Ye, Qing ; Cai, Haiwen ; Qu, Ronghui ; Fang, Zujie

Author_Institution

Shanghai Inst. of Opt. & Fine Mech., Shanghai, China

fYear

2011

fDate

13-16 Nov. 2011

Firstpage

1

Lastpage

6

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 new φ-OTDR system shows a good application foreground in the area of distributed vibration measurement.

Keywords

Rayleigh scattering; heterodyne detection; optical signal detection; optical time-domain reflectometry; vibration measurement; PZT vibration measurement; Rayleigh scattering light; beating signal; digital signal processing; distributed vibration measurement; external perturbation signal; heterodyne detection; instantaneous electric field; on digital coherent detection; optical gain; optical time-domain reflectometry; phase difference signal; phase sensitive OTDR system; Abstracts; IEL; Optical sensors; Vibration measurement; Coherent detection; Digital signal processing; Phase sensitive OTDR; Vibration measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Photonics Conference and Exhibition, 2011. ACP. Asia

Conference_Location

Shanghai

ISSN

2162-108X

Print_ISBN

978-0-8194-8961-6

Type

conf

DOI

10.1117/12.905657

Filename

6210884