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Proceedings Paper

Thickness influence on the polarization dependency of tilted fiber Bragg gratings coated by zinc oxide thin films
Author(s): Jean-Michel Renoirt; Chao Zhang; Marc Debliquy; Marie-Georges Olivier; Patrice Mégret; Christophe Caucheteur
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Paper Abstract

Tilted fiber Bragg gratings (TFBGs) transmitted amplitude spectra intrinsically depend on light polarization, leading to the existence of two peak families separated by a few picometers to a few tens of picometers for the s and p-polarized light states. In this paper, we demonstrate that, thanks to a dense thin film with high refractive index (Zinc oxide) deposited around TFBGs, the polarization dependency can be drastically enhanced, resulting in a wavelength separation of up to 550 picometers between the two orthogonal resonance peak families. This results in two important assets: the sensitivity is extended to surrounding refractive index (SRI) values above 1.45 while the strong polarization dependency makes the demodulation process easier with differential SRI sensitivities between the two modes families.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214K (17 October 2012); doi: 10.1117/12.974826
Show Author Affiliations
Jean-Michel Renoirt, Univ. of Mons (Belgium)
Chao Zhang, Univ. of Mons (Belgium)
Marc Debliquy, Univ. of Mons (Belgium)
Marie-Georges Olivier, Univ. of Mons (Belgium)
Patrice Mégret, Univ. of Mons (Belgium)
Christophe Caucheteur, Univ. of Mons (Belgium)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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