Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/55582
Title: In-fiber modal interferometer for high sensitivity gas detection
Authors: Yang, F
Jin, W 
Keywords: Gas sensor
Interference
Microstructured fiber
Optical fiber sensor
Photonic bandgap fiber
Photonic crystal fiber
Photothermal effect
Issue Date: 2015
Publisher: SPIE-International Society for Optical Engineering
Source: Proceedings of SPIE : the International Society for Optical Engineering, v. 9634, 963410 How to cite?
Journal: Proceedings of SPIE : the International Society for Optical Engineering 
Abstract: We demonstrate a gas sensor based on mode interference in a hollow-core photonic bandgap fiber. Gas absorption of a pump laser beam induces phase modulation of a propagating probe beam, which is detected by use of an in-fiber modal interferometer. An estimated detection limit of 2 ppm acetylene (7x10-5 in terms of noise equivalent absorbance or NEA) is achieved with 30-cm-long HC-PBF operating at the near infrared wavelength. This NEA is 22 times better than state-of-the-art HC-PBF gas sensors based on direct absorption spectroscopy.
URI: http://hdl.handle.net/10397/55582
ISBN: 9781628418392
ISSN: 0277-786X
EISSN: 1996-756X
DOI: 10.1117/12.2194864
Appears in Collections:Conference Paper

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