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Proceedings Paper

Distributed photothermal measurements of gas presence along holey optical fibers
Author(s): Andres Garcia-Ruiz; Juan Pastor-Graells; Hugo F. Martins; Kenny Hey Tow; Luc Thévenaz; Sonia Martin-Lopez; Miguel Gonzalez-Herraez
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Paper 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.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032361 (23 April 2017); doi: 10.1117/12.2263210
Show Author Affiliations
Andres Garcia-Ruiz, Univ. de Alcalá (Spain)
Juan Pastor-Graells, Univ. de Alcalá (Spain)
Hugo F. Martins, FOCUS S.L. (Spain)
Kenny Hey Tow, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Luc Thévenaz, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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