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High sensitivity optical sensor for H2S detection utilizing hollow-core photonic bandgap fiber

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Abstract

An optical fiber gas sensor using hollow-core photonic bandgap fiber as a gas cell is proposed to detect H2S mixed with natural gas. This sensor is advantages for eliminating instability of light source, impact of thermal zero drift, and zero shift of photoelectric device. The gas sensing probe of configuration is using four shorter pieces of hollow-core photonic bandgap fiber (HC-PBF) with the same overall length instead of one long piece of HC-PBF to improve the system response. The experimental data indicate that a minimum detectivity of 2 ppm for the system configuration was estimated.

© 2015 Optical Society of America

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