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Proceedings Paper

Solid-core photonic bandgap fiber with polymer coating for biosensing applications
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Paper Abstract

In order to achieve photonic band-gap effect as sensing mechanism and improve biocompatibility of relatively lower-cost silica-core phonic crystal fibers (SCPCF) and make use of photonic band-gap effect as sensing mechanism, polymer with similar biocompatibility as PMMA coating in SCPCF air-holes is proposed in this paper. In order to evaluate the polymer coating effect, a three-layer model of air hole is proposed. The wavelength shifts of photonic band-gap edges (PBEs) were evaluated by plane wave expansion (PWE) method, assuming refractive index of silica ns, polymer np and air na are 1.45, 1.50 and 1.00 respectively. Blue shifting of bands are observed in the simulation and the bandwidth of each band-gap becomes narrower with the increasing of air ratio. The result shows that 1nm change of air hole is able to obtain a wavelength shift of 0.43nm. Assuming the wavelength shift of 0.01nm can be detected, a small air hole variation of 0.023nm can be measured.

Paper Details

Date Published: 11 November 2008
PDF: 7 pages
Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713442 (11 November 2008); doi: 10.1117/12.803257
Show Author Affiliations
Y. F. Zhang, Nanyang Technological Univ. (Singapore)
C. C. Chan, Nanyang Technological Univ. (Singapore)
J. Sun, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 7134:
Passive Components and Fiber-based Devices V
Ming-Jun Li; Ping Shum; Ian H. White; Xingkun Wu, Editor(s)

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