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Atomic line vs. lens cavity filters: A comparison of their merits

Higgins, Clare R; Pizzey, Danielle; Mathew, Renju S; Hughes, Ifan G

Atomic line vs. lens cavity filters: A comparison of their merits Thumbnail


Renju S Mathew


We present a comparison between lens cavity filters and atomic line filters, discussing their relative merits for applications in quantum optics. We describe the design, characterization, and stabilization procedure of a lens cavity filter, which consists of a high-reflection coated commercially available plano-convex lens, and compare it to an ultra-narrow atomic band-pass filter utilizing the D2 absorption line in atomic rubidium vapor. We find that the cavity filter peak transmission frequency and bandwidth can be chosen arbitrarily but the transmission frequency is subject to thermal drift and the cavity needs stabilization to better than a few mK, while the atomic filter is intrinsically stable and tied to an atomic resonance frequency such that it can be used in a non-laboratory environment.


Higgins, C. R., Pizzey, D., Mathew, R. S., & Hughes, I. G. (2020). Atomic line vs. lens cavity filters: A comparison of their merits. OSA continuum, 3(4), 961-970.

Journal Article Type Article
Acceptance Date Mar 27, 2020
Online Publication Date Apr 7, 2020
Publication Date Apr 15, 2020
Deposit Date Feb 14, 2020
Publicly Available Date Apr 21, 2020
Journal OSA continuum.
Publisher Optica Publishing Group
Peer Reviewed Peer Reviewed
Volume 3
Issue 4
Pages 961-970


Published Journal Article (8.8 Mb)

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Copyright 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.

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