Low-loss, compact, fibre-integrated cell for quantum memories

Cameron McGarry, Kerrianne Harrington, Daniel J. Goodwin, Charles Perek-Jennings, Tim A. Birks, Kristina R. Rusimova, Peter J. Mosley

Research output: Contribution to journalArticlepeer-review


We present a low-loss, compact, hollow core optical fibre (HCF) cell integrated with single mode fibre (SMF). The cell is designed to be filled with atomic vapour and used as a component in photonic quantum technologies, with applications in quantum memory and optical switching. We achieve a total insertion loss of 0.6(2) dB at 780 nm wavelength via graded index fibre to ensure efficient mode matching coupled with anti-reflection coatings to minimise loss at the SMF-HCF interfaces. We also present numerical modelling of these interfaces, which can be undertaken efficiently without the need for finite element simulation. We encapsulate the HCF core by coupling to the SMF inside a support capillary, enhancing durability and facilitating seamless integration into existing fibre platforms.

Original languageEnglish
Pages (from-to)21925 - 21935
JournalOptics Express
Issue number12
Early online date31 May 2024
Publication statusPublished - 3 Jun 2024

Data Availability Statement

Data underlying the results presented in this paper are available in [50].

50. C. McGarry, K. Harrington, D. Goodwin, et al., “Dataset for Low-loss, compact, fibre-integrated cell for quantum memories,” University of Bath Research Data Archive: Version 2024, https://doi.org/10.15125/BATH-01403.

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