Modelling of long-period fibre grating response to refractive index higher than that of cladding

Hou, Ruozhou, Ghassemlooy, Zabih, Hassan, Aseel Kadhim, Lu, Chao and Dowker, K. (2001) Modelling of long-period fibre grating response to refractive index higher than that of cladding. Measurement Science and Technology, 12 (10). pp. 1709-1713. ISSN 0957-0233

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Abstract

In this paper we introduce a new mathematical model, which can be used to investigate the response of a long-period fibre grating to changes in ambient refractive indices of values both greater and less than that of the cladding. A numerical method to calculate the HE core and cladding modes is presented. The results show that even when the ambient refractive index is higher than that of the cladding, the coupling (resonance) wavelengths experience a measurable shift (a few nm). The result obtained suggests that LPGs coated with a material of higher refractive index than the cladding may be used as index sensors.

Item Type:	Article
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	25 Apr 2014 11:11
Last Modified:	12 Oct 2019 19:05
URI:	http://nrl.northumbria.ac.uk/id/eprint/16148

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