Distributed detection and localization of multiple dynamic perturbations using coherent correlation OTDR

M. G. Shlyagin; A. Arias; Rodolfo Martinez Manuel

doi:10.1117/12.2059777

2 June 2014 Distributed detection and localization of multiple dynamic perturbations using coherent correlation OTDR

M. G. Shlyagin, A. Arias, Rodolfo Martinez Manuel

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91576Z (2014) https://doi.org/10.1117/12.2059777
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A novel technique for distributed disturbance sensor is presented. It is based on Coherent Correlation OTDR operating in CW regime. The sensor utilizes a standard telecom CW DFB diode laser as a light source and a very simple configuration. Probe signals were generated by interferometer with OPD exceeding the coherence length of the laser light. Speckle-like OTDR traces were obtained by calculating cross-correlation function between the probe light intensity signal and the signal returned back from the sensing fiber. Perturbations are detected as time variation of correlation amplitude at disturbance locations. Preliminary experiments proved operability of the sensor.

Citation Download Citation

M. G. Shlyagin, A. Arias, and Rodolfo Martinez Manuel "Distributed detection and localization of multiple dynamic perturbations using coherent correlation OTDR", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576Z (2 June 2014); https://doi.org/10.1117/12.2059777

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