Distributed photothermal measurements of gas presence along holey optical fibers

Andres Garcia-Ruiz; Juan Pastor-Graells; Hugo F. Martins; Kenny Hey Tow; Luc Thévenaz; Sonia Martin-Lopez; Miguel Gonzalez-Herraez

doi:10.1117/12.2263210

23 April 2017 Distributed photothermal measurements of gas presence along holey optical fibers

Andres Garcia-Ruiz, Juan Pastor-Graells, Hugo F. Martins, Kenny Hey Tow, Luc Thévenaz, Sonia Martin-Lopez, Miguel Gonzalez-Herraez

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032361 (2017) https://doi.org/10.1117/12.2263210
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

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.

Citation Download Citation

Andres Garcia-Ruiz, Juan Pastor-Graells, Hugo F. Martins, Kenny Hey Tow, Luc Thévenaz, Sonia Martin-Lopez, and Miguel Gonzalez-Herraez "Distributed photothermal measurements of gas presence along holey optical fibers", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032361 (23 April 2017); https://doi.org/10.1117/12.2263210

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