11 November 2008 Solid-core photonic bandgap fiber with polymer coating for biosensing applications
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Proceedings Volume 7134, Passive Components and Fiber-based Devices V; 713442 (2008); doi: 10.1117/12.803257
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China
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.
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Y. F. Zhang, C. C. Chan, J. Sun, "Solid-core photonic bandgap fiber with polymer coating for biosensing applications", Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713442 (11 November 2008); doi: 10.1117/12.803257; https://doi.org/10.1117/12.803257
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KEYWORDS
Polymers

Coating

Refractive index

Autoregressive models

Silica

Photorefractive polymers

Biosensing

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