Title :
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
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;
Conference_Titel :
Communications and Photonics Conference and Exhibition, 2011. ACP. Asia
Conference_Location :
Shanghai
Print_ISBN :
978-0-8194-8961-6
