Simulated and experimental demonstration of CO2 detection using sequentially drilled and non-drilled open-air photonic fiber segments

Matthew Heyrich; William Delmas; Sarah Sahota; Tiziana Bond

doi:10.1117/12.2609250

4 March 2022 Simulated and experimental demonstration of CO₂ detection using sequentially drilled and non-drilled open-air photonic fiber segments

Matthew Heyrich, William Delmas, Sarah Sahota, Tiziana Bond

Author Affiliations +

Proceedings Volume 11997, Optical Components and Materials XIX; 119970U (2022) https://doi.org/10.1117/12.2609250
Event: SPIE OPTO, 2022, San Francisco, California, United States

Conference Poster

Abstract

Many industrial processes currently require accurate and sensitive monitoring of CO₂ gas. To increase the sensitivity of CO₂ detection, open-air photonic fibers have been proposed. Open-air photonic fibers have a hollow core allowing the intercalation of gas into the fiber, allowing for the amplification of measurement techniques like absorption or Raman spectroscopy to detect CO₂ concentrations. We use conducted a variety of COMSOL based studies aimed at minimizing gas diffusion time throughout the hollow core. We investigate both pressure driven and diffusion based gas delivery methods, finding that both possess the ability to greatly reduce sensor response time. Preliminary experiments in a controlled environment validated the models and showed the ability to detect and control the uptake of CO₂ in open-air photonics fibers. This lays the foundation of a distributed chemical sensing system, particularly important for monitoring well integrity for carbon capture and storage, providing early warning for an incoming well failure and potential CO₂ leaking through it, potentially affecting proximal aquifers, a large public concern.

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Matthew Heyrich, William Delmas, Sarah Sahota, and Tiziana Bond "Simulated and experimental demonstration of CO₂ detection using sequentially drilled and non-drilled open-air photonic fiber segments", Proc. SPIE 11997, Optical Components and Materials XIX, 119970U (4 March 2022); https://doi.org/10.1117/12.2609250

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