Cavity ring-down technique for remote sensing: a proof-of-concept for displacement measurement

Susana Silva; M. B. Marques; O. Frazão

doi:10.1117/12.2236003

30 May 2016 Cavity ring-down technique for remote sensing: a proof-of-concept for displacement measurement

Susana Silva, M. B. Marques, O. Frazão

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991615 (2016) https://doi.org/10.1117/12.2236003
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

This work demonstrates the viability of using a cavity ring-down technique (CRD) for remote sensing. A conventional CRD configuration is used where and optical circulator is added inside the fibre loop to couple 20 km of optical fibre with a gold mirror at its end with the purpose of remote sensing. As a proof-of-concept, an intensity sensor based on an eight-figure configuration is used at the end of the 20 km of fibre for displacement sensing. In this case, a commercial OTDR is used as modulated light source to send impulses down to the fibre ring.

Citation Download Citation

Susana Silva, M. B. Marques, and O. Frazão "Cavity ring-down technique for remote sensing: a proof-of-concept for displacement measurement", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991615 (30 May 2016); https://doi.org/10.1117/12.2236003

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