Fugitive methane leak detection using mid-infrared hollow-core photonic crystal fiber containing ultrafast laser drilled side-holes

Jason Karp; William Challener; Matthias Kasten; Niloy Choudhury; Sabarni Palit; Gary Pickrell; Daniel Homa; Adam Floyd; Yujie Cheng; Fei Yu; Jonathan Knight

doi:10.1117/12.2229084

12 May 2016 Fugitive methane leak detection using mid-infrared hollow-core photonic crystal fiber containing ultrafast laser drilled side-holes

Jason Karp, William Challener, Matthias Kasten, Niloy Choudhury, Sabarni Palit, Gary Pickrell, Daniel Homa, Adam Floyd, Yujie Cheng, Fei Yu, Jonathan Knight

Author Affiliations +

Proceedings Volume 9852, Fiber Optic Sensors and Applications XIII; 985210 (2016) https://doi.org/10.1117/12.2229084
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

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.

Citation Download Citation

Jason Karp, William Challener, Matthias Kasten, Niloy Choudhury, Sabarni Palit, Gary Pickrell, Daniel Homa, Adam Floyd, Yujie Cheng, Fei Yu, and Jonathan Knight "Fugitive methane leak detection using mid-infrared hollow-core photonic crystal fiber containing ultrafast laser drilled side-holes", Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 985210 (12 May 2016); https://doi.org/10.1117/12.2229084

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