Dragomir, Nicoleta, Ampem-Lassen, Eric, Baxter, Gregory W, Pace, P, Huntington, Shane, Stevenson, A and Roberts, Ann (2006) Analysis of changes in optical fibres during arc-fusion splicing by use of quantitative phase imaging. Microscopy research and technique, 69 (11). pp. 847-851. ISSN 1059-910X

Abstract

A non-interferometric imaging technique in conjunction with Abel inversion is used to directly and quantitatively examine the changes in optical fibers due to the heating produced during arc-fusion splicing as a function of fusion arc parameters. Phase images in the vicinity of a fusion splice are obtained using Quantitative Phase Microscopy, allowing the refractive-index change to be reconstructed with high spatial resolution. This simple, nondestructive method confirms that, for a fixed arc current, while the fusion time increases, the refractive-index of both fiber cores within the fusion region decreases in magnitude, the core region broadens, and the axial gradient decreases

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