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30 May 2016 Phase-OFDR for distributed disturbance measurement
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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991624 (2016)
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland
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.
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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);

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