Suspended-core holey fiber for evanescent-field sensing

Webb, A.S., Poletti, F., Richardson, D.J. and Sahu, J.K. (2007) Suspended-core holey fiber for evanescent-field sensing. Optical Engineering, 46, (1), 010503-010506. (doi:10.1117/1.2430505).


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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 ?m, 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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1117/1.2430505
Additional Information:
ISSNs: 0091-3286 (print)
Related URLs:
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
R Medicine > RZ Other systems of medicine
Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 48349
Accepted Date and Publication Date:
1 January 2007Published
Date Deposited: 13 Sep 2007
Last Modified: 31 Mar 2016 12:24

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