Phase-OFDR for distributed disturbance measurement

Sascha Liehr; Katerina Krebber

doi:10.1117/12.2236851

30 May 2016 Phase-OFDR for distributed disturbance measurement

Sascha Liehr, Katerina Krebber

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991624 (2016) https://doi.org/10.1117/12.2236851
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

We introduce the optical frequency domain reflectometry (OFDR) technique based on intensity modulation frequency sweep measurement for distributed disturbance measurement in optical fibres. By evaluating interferometric Rayleigh scattering changes along the fibre, strain and temperature changes are detected with 100 n(epsilon) sensitivity and 10 mK resolution. The vibration frequencies for low frequencies and up to the kHz-range can be obtained from power change evaluation in the spatial domain. This novel OFDR approach is a low-cost alternative for distributed disturbance measurement up to distances of several kilometres.

Citation Download Citation

Sascha Liehr and Katerina Krebber "Phase-OFDR for distributed disturbance measurement", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991624 (30 May 2016); https://doi.org/10.1117/12.2236851

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