Impact of Pressure-Induced Differential Refractive Index in Raman Spectroscopy using Hollow-Core Fibres

Autor:	M. Foster, William Brooks, Ian A. Davidson, Matthew Partridge, David J. Richardson, Natalie V. Wheeler, Francesco Poletti, G. T. Jasion, Shuichiro Rikimi, Peter Horak, T. W. Kelly
Rok vydání:	2021
Předmět:	Materials science Optical fiber business.industry Attenuation Cladding (fiber optics) Methane law.invention Core (optical fiber) chemistry.chemical_compound symbols.namesake chemistry law symbols Optoelectronics business Raman spectroscopy Refractive index Raman scattering
Zdroj:	Scopus-Elsevier
DOI:	10.1109/cleo/europe-eqec52157.2021.9542579
Popis:	Raman spectroscopy is an attractive technique for simultaneous analysis of multiple gas species. Exploiting hollow-core microstructured optical fibres (HC-MOFs) for enhanced gas-light interaction length allows for extremely low detection limits of, e.g., 0.2 ppm methane [1] . Recently, we reported that extremely small changes in the refractive indices of the gases inside the core and cladding regions (as induced by differential gas pressure) significantly impact the optical properties of these fibres [2] . Here we exploit this effect to almost double the Raman signal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d02e744a0ba5406efa1bb002e417e7ee https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542579 Zobrazit plný text záznamu