2024/07/26 by Kerrianne Harrington, R.J. Mears, Harrington, Kerrianne +9 · 1 citation
Chemistry · Engineering · #Advanced Fiber Optic Sensors #FOS: Physical sciences #Optics (physics.optics) #Photonic Crystal and Fiber Optics #Spectroscopy and Laser Applications
paper · pdf · doi:10.48550/arxiv.2407.18674
openalex publication_date 2024/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have observed unexpected spectral attenuation of ultraviolet light in freshly drawn hollow core optical fibres. When the fibre ends are left open to atmosphere, this loss feature dissipates over time. The loss matches the absorption spectrum of gaseous (molecular) chlorine and, given enough time, the transmission spectrum of the fibre recovers to that expected from the morphological structure of the fibre. Our measurements indicate an initial chlorine concentration of 0.45 μ mol/cm3 in the hollow core, equivalent to 1.1 mol% Cl2 at atmospheric pressure.