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Proceedings Paper

Light coupling model for a photonic crystal fiber with air holes collapsed at the fiber end
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Paper Abstract

The air holes structured in a Photonic crystal fiber’s cladding are easily contaminated by dust and moisture. For some applications, the fibers need to be in contact with fluids. The capillary effect will then draw the fluid into the air holes and change the optical properties of the fiber. A simple solution to avoid this effect is to collapse these air holes near the fiber end face. This, however, will in turn significantly affect the optical properties in such a way that they will need to be specifically investigated. In this paper we present a theoretical model of light transmission in the area of a collapsed fiber end face. We demonstrate that the air hole collapsed PCF could be represented by an equivalent PCF fiber with complete holes. A shorter collapsed segment will lead to a higher accuracy of this model and to a higher power coupling efficiency than a longer collapsed segment. Error distributions are calculated for different incident angles and for different core sizes. A 0.7 m length of a PM-1550-01 polarization maintaining PCF fiber is experimentally investigated. The setup uses an optical fiber splicer to couple light from another PM-1550-01 PCF fiber to the investigated PCF fiber. A SLD is used as a light source. The transmitted light is measured by a EXFO Fibre-Optic Tester. By adjusting the distance between the launching fiber and the receiving PCF fiber (10 mm per step), the intensity-distance curves are generated for 3 different collapsed distances: 1. Air holes of PCF fiber are not collapsed; 2. Air holes are collapsed at about ~1/5 OD and 3. Air holes are collapsed at about ~1 OD. The analysis of these curves confirms the validity of the developed theoretical model.

Paper Details

Date Published: 16 November 2004
PDF: 6 pages
Proc. SPIE 5579, Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers, (16 November 2004); doi: 10.1117/12.567400
Show Author Affiliations
Jianjun Ma, Univ. du Québec en Outaouais (Canada)
Wojtek J. Bock, Univ. du Québec en Outaouais (Canada)

Published in SPIE Proceedings Vol. 5579:
Photonics North 2004: Photonic Applications in Telecommunications, Sensors, Software, and Lasers
Donna Strickland; Trevor J. Hall; Stoyan Tanev; Xiaoyi Bao; Franko Kueppers; David V. Plant, Editor(s)

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