Distributed photothermal measurements of gas presence along holey optical fibers

Chirped-pulse phase-sensitive optical time domain reflectometry has shown a remarkable performance when applied to dynamic measurements of strain and temperature, recently reaching ranges of several kilometers while interrogating the fiber at acoustic frequencies. In this work, its sensitivity, fast response, and high spatial resolution are exploited to implement a proof-of-concept of a selective distributed chemical sensor based on the photothermal effect. The presented scheme is able to perform distributed spectroscopic measurements of acetylene presence along a 10 m-long holey fiber. This potentially gives rise to a new kind of distributed chemical sensors capable of tracking the concentration of chemical species over kilometres.


Published in:
25th International Conference On Optical Fiber Sensors (OFS'25), SPIE Proceedings 10323, 1032361
Presented at:
25th International Conference on Optical Fibre Sensors (OFS), Jeju, Korea, April 24-28, 2017
Year:
2017
Publisher:
New York, SPIE
ISBN:
978-1-5090-4850-2
Keywords:
Laboratories:




 Record created 2017-12-04, last modified 2018-09-13

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