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28 September 2015 Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing
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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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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