Share Email Print

Optical Engineering • Open Access

Suspended-core holey fiber for evanescent-field sensing
Author(s): Andrew S. Webb; Francesco Poletti; David J. Richardson; Jayanta Kumar Sahu

Paper Abstract

A simple fabrication technique for a silica suspended-core holey fiber design is presented that features a higher air-filling fraction than most holey fibers, making it ideal for evanescent-field-sensing applications. The holes in the fiber are defined through mechanical drilling of the preform, which is a significantly quicker and more straightforward approach to the customary stacking method. During the draw, the shape of the holes are manipulated so that the final fiber design approximates that of an air-suspended rod with three fine struts supporting the core. Modeling reveals that the modal overlap is greater than 29% at 1550 nm for a core diameter of 0.8 µm, which is significantly higher than any previously reported index-guiding structure used for sensing. A basic gas sensor is demonstrated using acetylene as the sensing medium and the results are reported.

Paper Details

Date Published: 1 January 2007
PDF: 3 pages
Opt. Eng. 46(1) 010503 doi: 10.1117/1.2430505
Published in: Optical Engineering Volume 46, Issue 1
Show Author Affiliations
Andrew S. Webb, Univ. of Southampton (United Kingdom)
Francesco Poletti, Univ. of Southampton (United Kingdom)
David J. Richardson, Univ. of Southampton (United Kingdom)
Jayanta Kumar Sahu, Univ. of Southampton (United Kingdom)

© SPIE. Terms of Use
Back to Top