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Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry.

Keaveney, James and Wrathmall, Steven A. and Adams, Charles S. and Hughes, Ifan G. (2018) 'Optimized ultra-narrow atomic bandpass filters via magneto-optic rotation in an unconstrained geometry.', Optics letters., 43 (17). pp. 4272-4275.


Atomic bandpass filters are widely used in a variety of applications, owing to their high peak transmission and narrow bandwidths. Much of the previous literature has used the Faraday effect to realize these filters, where an axial magnetic field is applied across the atomic medium. Here we show that by using a non-axial magnetic field, the performance of these filters can be improved in comparison to the Faraday geometry. We optimize the performance of these filters using a numerical model and verify their performance by direct quantitative comparison with experimental data. We find excellent agreement between experiment and theory. These optimized filters could find use in many of the areas where Faraday filters are currently used, with little modification to the optical setup, allowing for improved performance with relatively little change.

Item Type:Article
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Publisher statement:Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Date accepted:09 July 2018
Date deposited:31 August 2018
Date of first online publication:29 August 2018
Date first made open access:No date available

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