The University of Southampton
University of Southampton Institutional Repository

Cross-sectional transformers for the signal-enhancement of intensity-based evanescent field sensors

Gnewuch, H., Hua, P., Wilkinson, J.S. and Jansen, K. (1994) Cross-sectional transformers for the signal-enhancement of intensity-based evanescent field sensors Sensors and Actuators B: Chemical, 22, (3), pp. 165-173.

Record type: Article


A cross-sectional transformer (CST) that allows efficient interconnection between a conventional multimode optical fibre and a broad shallow waveguide, designed for strong interaction of guided modes with sensing materials in the evanescent field, is described. A ray approach is used to determine a simple theoretical relationship between the geometrical configuration of the transformer and the enhancement in sensitivity to absorption. Thinly clad rectangular optical fibres have been drawn from a composite preform, and a CST has been fabricated using a suitably formed bundle of these fibres. An enhancement of 3.9±0.6 dB of the power collected from a broad slab waveguide compared with that collected directly by a multimode fibre is measured. The attenuation of the rectangular fibres that comprise the CST is 0.1±10.07 dB /cm at 550 nm.

Full text not available from this repository.

More information

Published date: December 1994


Local EPrints ID: 78255
ISSN: 0925-4005
PURE UUID: 7f574eaa-ef97-4068-8343-3e8c8fb390e9
ORCID for J.S. Wilkinson: ORCID iD

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 21 Oct 2017 11:28

Export record


Author: H. Gnewuch
Author: P. Hua
Author: J.S. Wilkinson ORCID iD
Author: K. Jansen

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.