2 June 2014 Brillouin dynamic grating time-domain slope-assisted fast and distributed strain sensing
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915770 (2014) https://doi.org/10.1117/12.2059288
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
A new fast and distributed optical time-domain sensing technique, employing the slope of Brillouin dynamic gratings (BDG) in polarization-maintaining (PM) fibers, is proposed and demonstrated. The strain sensitivity of the reflectivity of a pulsed probe, orthogonally polarized to the pumps which generated the BDG, is shown to depend on both pump and probe detuning. An optimum detuning point is then found, which provides maximum strain sensitivity. We report the measurement of 400Hz strain vibrations with a spatial resolution of 4.2cm at a sampling rate of 16kHz.
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A. Bergman, A. Bergman, L. Yaron, L. Yaron, T. Langer, T. Langer, M. Tur, M. Tur, } "Brillouin dynamic grating time-domain slope-assisted fast and distributed strain sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915770 (2 June 2014); doi: 10.1117/12.2059288; https://doi.org/10.1117/12.2059288
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