Distributed measurement of gas pressure dynamics in as-drawn hollow-core fibres

Elizaveta Elistratova; Thomas W. Kelly; Ian A. Davidson; Jaroslaw Rzegocki; Ghafour Amouzad Mahdiraji; Somarpita Pradhan; Austin Taranta; Francesco Poletti; Radan Slavik; Peter Horak; Natalie V. Wheeler

doi:10.1117/12.3017534

20 June 2024 Distributed measurement of gas pressure dynamics in as-drawn hollow-core fibres

Elizaveta Elistratova, Thomas W. Kelly, Ian A. Davidson, Jaroslaw Rzegocki, Ghafour Amouzad Mahdiraji, Somarpita Pradhan, Austin Taranta, Francesco Poletti, Radan Slavik, Peter Horak, Natalie V. Wheeler

Author Affiliations +

Proceedings Volume PC13001, Specialty Optical Fibres VIII; PC130010A (2024) https://doi.org/10.1117/12.3017534
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

After fabrication, the gas pressure inside the core and cladding of hollow-core fibres is significantly below atmospheric pressure. If such an “as-drawn” fibre is then exposed to the atmosphere, pressure-driven flow will push gas from the surrounding environment into the core and cladding holes at different rates, affecting its performance. We use optical time-domain reflectometry to study the length-distributed gas flow dynamics in an as-drawn double-nested antiresonant nodeless fibre (DNANF). For the first time, we show measurement of the initial “as-drawn" pressure distribution along the fibre length and its subsequent evolution over time. Experimental measurements are then compared with gas flow simulations, to enable prediction of pressure equalisation times.

Conference Presentation

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Elizaveta Elistratova, Thomas W. Kelly, Ian A. Davidson, Jaroslaw Rzegocki, Ghafour Amouzad Mahdiraji, Somarpita Pradhan, Austin Taranta, Francesco Poletti, Radan Slavik, Peter Horak, and Natalie V. Wheeler "Distributed measurement of gas pressure dynamics in as-drawn hollow-core fibres", Proc. SPIE PC13001, Specialty Optical Fibres VIII, PC130010A (20 June 2024); https://doi.org/10.1117/12.3017534

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