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Type: Journal article
Title: Magnetic field interaction with guided light for detection of an active gaseous medium within an optical fiber
Author: Englich, F.
Grabka, M.
Lancaster, D.
Monro, T.
Citation: Optics Express, 2013; 21(2):2491-2499
Publisher: Optical Soc Amer
Issue Date: 2013
ISSN: 1094-4087
Statement of
Florian V. Englich, Michal Grabka, David G. Lancaster, and Tanya M. Monro
Abstract: We report a novel fiber-optic sensing architecture for the detection of paramagnetic gases. By interacting a modulated magnetic field with guided light within a microstructured optical fiber, it is possible to exploit Faraday Rotation Spectroscopy (FRS) within unprecedentedly small sample volumes. This approach, which utilizes magnetic circular birefringence and magnetic circular dichroism effects, is applied to a photonic bandgap fiber to detect molecular oxygen and operates at a wavelength of 762.309 nm. The optical fiber sensor has a 4.2 nL detection volume and 14.8 cm long sensing region. The observed FRS spectra are compared with a theoretical model that provides a first understanding of guided-mode FRS signals. This FRS guided-wave sensor offers the prospect of new compact sensing schemes.
Keywords: Gases
Spectrum Analysis
Equipment Design
Equipment Failure Analysis
Optical Fibers
Magnetic Fields
Rights: © 2013 Optical society of America
DOI: 10.1364/OE.21.002491
Appears in Collections:Aurora harvest
IPAS publications

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