C₂H₂ sensing at ν₁+ν₃ band with a hollow-core photonic bandgap fiber

Abstract

In this paper, we demonstrate the acetylehe (C₂H₂) sensor with high sensitivity using a hollow-core photonic bandgap fiber (HC-PCF). Experiments for measuring C₂H₂ concentrations in gas mixture are performed. Using a 2 m-long HC-PCF as gas cell, the spectrum of acetylene at ν₁+ν₃ band has been measured, and the P11-branch has been selected for the purpose of sensing. A minimum detectivity of 143 parts per million by volume (ppmv) for the system configuration is estimated.

Keywords

Acetylene / Single Mode Fiber / Hydrogen Cyanide / Photonic Bandgap Fiber / Concentration Detection Limit

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