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Proceedings Paper

Simulation of the effect of adhesion and cross-sectional nonuniformity of coatings on the thermal tuning of fiber Bragg gratings
Author(s): Jinu Paul; Liping Zhao; B.K.A. Ngoi; Zhong Ping Fang; Toh Kian Yong; Zhaowei Zhong
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Paper Abstract

Polymeric coatings are often used to develop various thermally tunable FBG based devices. Coatings on FBGs can be intended for protection, improvement of thermal sensitivities, special spectral shaping etc., and the quality of the coating on the FBG deserves special attention. For example, the adhesion of the polymeric coatings to the silica based optical fiber plays an important role in the wavelength response characteristics of fiber Bragg gratings during thermal tuning. In this paper, we theoretically investigate the effect of adhesion and the non-uniformity of the coating thickness on the thermal tuning process of FBGs. Experiments were done to qualitatively analyze the influence of adhesion. However practically it is very difficult to quantify the percentage adhesion and quality of coatings for experimental verification. Therefore a methodology based on finite element analysis has been utilized for theoretical investigation of the effect of adhesion of polymeric coating on the performance of FBG based thermally tuned devices. Three-dimensional finite element simulations were carried out. Spring elements are used to inter connect the nodes of the meshed models of optical fiber and coating. The effect of adhesion is studied as a function of spring stiffness. The effect of non-uniformity in the coating thickness in the circumferential direction was also studied.

Paper Details

Date Published: 10 September 2004
PDF: 8 pages
Proc. SPIE 5465, Reliability of Optical Fiber Components, Devices, Systems, and Networks II, (10 September 2004); doi: 10.1117/12.545575
Show Author Affiliations
Jinu Paul, Nanyang Technological Univ. (Singapore)
Liping Zhao, Singapore Institute of Manufacturing Technology (Singapore)
B.K.A. Ngoi, Nanyang Technological Univ. (Singapore)
Zhong Ping Fang, Singapore Institute of Manufacturing Technology (Singapore)
Toh Kian Yong, Nanyang Technological Univ. (Singapore)
Zhaowei Zhong, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 5465:
Reliability of Optical Fiber Components, Devices, Systems, and Networks II
Hans G. Limberger; M. John Matthewson, Editor(s)

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