2 June 2014 Cavity ring-down with OTDR for remote sensing
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570G (2014) https://doi.org/10.1117/12.2057971
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
This work presents a demonstration of the potential of fiber cavity ring-down for remote sensing, by using an OTDR to send impulses down ~20 km of optical fiber at the end of which the fiber ring cavity was placed. The OTDR showed almost no losses in the fiber, so other ring-down cavities could be spliced along the same fiber. To study the sensitivity of the cavity ring an intensity sensor based on a taper was placed in the ring and glued to a translation stage. A displacement of the stage imposes a curvature on the taper and an associated loss. The configuration had a sensitivity of (11.8±0.5) μs/mm.
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D. J. Passos, S. O. Silva, M. B. Marques, O. Frazão, "Cavity ring-down with OTDR for remote sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570G (2 June 2014); doi: 10.1117/12.2057971; https://doi.org/10.1117/12.2057971
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