Better magneto-optical filters with cascaded vapor cells

Logue, Fraser D.; Briscoe, Jack D.; Pizzey, Danielle; Wrathmall, Steven A.; Hughes, Ifan G.

doi:10.1364/ol.459291

Better magneto-optical filters with cascaded vapor cells

Logue, Fraser D.; Briscoe, Jack D.; Pizzey, Danielle; Wrathmall, Steven A.; Hughes, Ifan G.

Authors

Fraser Logue fraser.d.logue2@durham.ac.uk
PGR Student Doctor of Philosophy

Jack Briscoe jack.d.briscoe@durham.ac.uk
PGR Student Doctor of Philosophy

Dr Danielle Pizzey danielle.boddy@durham.ac.uk
Chief Experimental Officer

Dr Steven Wrathmall s.a.wrathmall@durham.ac.uk
Assistant Professor

Professor Ifan Hughes i.g.hughes@durham.ac.uk
Professor

Abstract

Single-cell magneto-optical Faraday filters find great utility and are realized with either ‘wing’ or ‘line center’ spectral profiles. We show that cascading a second cell with independent axial (Faraday) or transverse (Voigt) magnetic field leads to improved performance in terms of figure of merit (FOM) and spectral profile. The first cell optically rotates the plane of polarization of light creating the high transmission window; the second cell selectively absorbs the light eliminating unwanted transmission. Using naturally-abundant Rb vapor cells, we realize a Faraday-Faraday wing filter and the first recorded Faraday-Voigt line center filter which show excellent agreement with theory. The two filters have FOM values of 0.86 and 1.63 GHz−1 respectively.

Citation

Logue, F. D., Briscoe, J. D., Pizzey, D., Wrathmall, S. A., & Hughes, I. G. (2022). Better magneto-optical filters with cascaded vapor cells. Optics Letters, 47(12), 2975-2978. https://doi.org/10.1364/ol.459291

Journal Article Type	Article
Acceptance Date	May 10, 2022
Online Publication Date	Jun 3, 2022
Publication Date	2022
Deposit Date	May 13, 2022
Publicly Available Date	Jun 3, 2023
Journal	Optics Letters
Print ISSN	0146-9592
Electronic ISSN	1539-4794
Publisher	Optica
Peer Reviewed	Peer Reviewed
Volume	47
Issue	12
Pages	2975-2978
DOI	https://doi.org/10.1364/ol.459291

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