Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing

Thomas Kissinger; Ricardo Correia; Thomas O. H. Charrett; Stephen W. James; Ralph P. Tatam

doi:10.1117/12.2194347

28 September 2015 Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing

Thomas Kissinger, Ricardo Correia, Thomas O. H. Charrett, Stephen W. James, Ralph P. Tatam

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96341Q (2015) https://doi.org/10.1117/12.2194347
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A range-resolved interferometric signal processing technique using sinusoidal optical frequency modulation is applied to fibre segment interferometry. Here, six optical fibre segments of gauge length 12.5 cm are used as interferometric strain sensors and are formed between seven weak, broadband fibre Bragg gratings, acting as in-fibre partial reflectors. In a very simple and cost-effective optical setup using injection current modulation of a laser diode source, interferometric measurement of acoustic wave propagation in a metal rod is used to demonstrate the capabilities of the technique.

Citation Download Citation

Thomas Kissinger, Ricardo Correia, Thomas O. H. Charrett, Stephen W. James, and Ralph P. Tatam "Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341Q (28 September 2015); https://doi.org/10.1117/12.2194347

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