Sub-Minute Response Time of a Hollow-Core Photonic Bandgap Fiber Gas Sensor

Author

Wynne, Rosalind M. ; Barabadi, Banafsheh ; Creedon, Kevin J. ; Ortega, Alfonso

Author_Institution

Dept. of Electr. & Comput. Eng., Villanova Univ., Villanova, PA

Volume

27

Issue

11

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1590

Lastpage

1596

Abstract

A hollow-core photonic bandgap (PBG) fiber sensing configuration for optical absorption spectroscopy of multiple-component gas samples absent of a vacuum environment is presented. Pressure-driven sensor response times that are shorter in duration compared to diffusion-limited filling times for fiber lengths >1 m are reported. Reduced filling times that approach the sub-minute regime are possible for a ~2 meter length of commercially available PBG fiber with a 12.5 micron core diameter at a pressure <15 Psi. The spectroscopy measurements were limited to the near-IR region for sample gases that include acetylene and carbon dioxide. Using the techniques presented, the detection of concentrations <100 ppm for acetylene gas at pressures <15 Psi is possible.

Keywords

fibre optic sensors; gas sensors; holey fibres; photonic band gap; pressure sensors; spectrochemical analysis; PBG fiber; acetylene gas; hollow-core photonic bandgap fiber gas sensor; near-IR region; optical absorption spectroscopy; pressure-driven sensor; sub-minute response time; Absorption; Delay; Filling; Gas detectors; Gases; Optical fiber sensors; Optical sensors; Photonic band gap; Photonic bandgap fibers; Spectroscopy; Gas sensing; hollow-core photonic bandgap fiber; spectroscopy;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2009.2019258

Filename

5037985