Engineering of a Ge–Te–Se glass fibre evanescent wave spectroscopic (FEWS) mid-IR chemical sensor for the analysis of food and pharmaceutical products

Abstract

Article:Jiang, X and Jha, A orcid.org/0000-0003-3150-5645 (2015) Engineering of a Ge-Te-Se glass fibre evanescent wave spectroscopic (FEWS) ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.

Progress in preparation and applications of Te-As-Se chalcogenide glasses and fibers

“…The detailed explanation of Maxwell's equation shows that the standing wave is exponentially attenuated when it extends along the reflection cross section to a medium with a low refractive index, which called evanescent wave. A key parameter is the penetration depth (d p ) of the evanescent field for sensing detection [44].…”

Mid-infrared supercontinuum generation from 2 to 14 μm in arsenic- and antimony-free chalcogenide glass fibers

“…The studied compositions belong to the Ge-Se-Te ternary system for both core and cladding glasses. This system has already been studied for optical fibers preparation [22,23,24,25] and thin films [26]. Despite the fact that previous works explored the full ternary diagram especially for thin films, to the best of our knowledge, no result about low-losses (<5dB/m) step-index fibers has been yet reported.…”

Mid-infrared two-octave spanning supercontinuum generation in a Ge–Se–Te glass suspended core fiber

“…The control of Te and Se contents (i.e., from Se-rich to Terich) in the glass system allow to change the resulting refractive index over the range 2.5-3.4 in the mid-IR. In 2015, Jiang et al proposed a purification process to obtain a low-loss Se-rich Ge-Se-Te chalcogenide fiber (Ge 20 Se 70 Te 10 ) [30]. The optical loss was found to be 1.4 dB/m at 4.2µm and less than 3dB/m between 1.5 and 6.3 µm.…”