Detection of molecular oxygen by magnetic field interaction with guided light within an optical fiber

Florian V. Englich; Tanya M. Monro

doi:10.1117/12.973667

17 October 2012 Detection of molecular oxygen by magnetic field interaction with guided light within an optical fiber

Florian V. Englich; Tanya M. Monro

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84211T (2012) https://doi.org/10.1117/12.973667
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

We report a novel fiber-optic sensing architecture for the detection of paramagnetic gases that exploits the interaction of a magnetic field with guided light to detect an active gaseous medium within a hollow-core photonic bandgap fiber. This first demonstration of a fiber-based Faraday Rotation Spectroscopy (FRS) sensor operates at 762.309 nm for the detection of molecular oxygen. The optical fiber sensor has a 14.8 cm long sensing region and 4.2 nL detection volume. A measured FRS spectrum with a signal-to-noise ratio of 9.5 proves the principle of this new gas sensor architecture.

Citation Download Citation

Florian V. Englich, Florian V. Englich, Tanya M. Monro, Tanya M. Monro, } "Detection of molecular oxygen by magnetic field interaction with guided light within an optical fiber", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211T (17 October 2012); doi: 10.1117/12.973667; https://doi.org/10.1117/12.973667

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