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Proceedings Paper

Fugitive methane leak detection using mid-infrared hollow-core photonic crystal fiber containing ultrafast laser drilled side-holes
Author(s): Jason Karp; William Challener; Matthias Kasten; Niloy Choudhury; Sabarni Palit; Gary Pickrell; Daniel Homa; Adam Floyd; Yujie Cheng; Fei Yu; Jonathan Knight
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Paper Abstract

The increase in domestic natural gas production has brought attention to the environmental impacts of persistent gas leakages. The desire to identify fugitive gas emission, specifically for methane, presents new sensing challenges within the production and distribution supply chain. A spectroscopic gas sensing solution would ideally combine a long optical path length for high sensitivity and distributed detection over large areas. Specialty micro-structured fiber with a hollow core can exhibit a relatively low attenuation at mid-infrared wavelengths where methane has strong absorption lines. Methane diffusion into the hollow core is enabled by machining side-holes along the fiber length through ultrafast laser drilling methods. The complete system provides hundreds of meters of optical path for routing along well pads and pipelines while being interrogated by a single laser and detector. This work will present transmission and methane detection capabilities of mid-infrared photonic crystal fibers. Side-hole drilling techniques for methane diffusion will be highlighted as a means to convert hollow-core fibers into applicable gas sensors.

Paper Details

Date Published: 12 May 2016
PDF: 7 pages
Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 985210 (12 May 2016); doi: 10.1117/12.2229084
Show Author Affiliations
Jason Karp, GE Global Research (United States)
William Challener, GE Global Research (United States)
Matthias Kasten, GE Global Research (United States)
Niloy Choudhury, GE Global Research (United States)
Sabarni Palit, GE Global Research (United States)
Gary Pickrell, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Homa, Virginia Polytechnic Institute and State Univ. (United States)
Adam Floyd, Virginia Polytechnic Institute and State Univ. (United States)
Yujie Cheng, Virginia Polytechnic Institute and State Univ. (United States)
Fei Yu, Univ. of Bath (United Kingdom)
Jonathan Knight, Univ. of Bath (United Kingdom)

Published in SPIE Proceedings Vol. 9852:
Fiber Optic Sensors and Applications XIII
Eric Udd; Gary Pickrell; Henry H. Du, Editor(s)

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