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

R. Hou; Z. Ghassemlooy; A. Hassan; Chao Lu; K. P. Dowker

doi:10.1088/0957-0233/12/10/314

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

R. Hou, Z. Ghassemlooy, A. Hassan, Chao Lu, K. P. Dowker

Research output: Journal article publication › Journal article › Academic research › peer-review

79 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1709-1713
Number of pages	5
Journal	Measurement Science and Technology
Volume	12
Issue number	10
DOIs	https://doi.org/10.1088/0957-0233/12/10/314
Publication status	Published - 1 Jan 2001
Externally published	Yes

Keywords

Cladding mode
Core mode
Index sensors
Leaky mode
Long-period grating

ASJC Scopus subject areas

Instrumentation
Applied Mathematics

More information

10.1088/0957-0233/12/10/314

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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.",

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AU - Hou, R.

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AU - Hassan, A.

AU - Lu, Chao

AU - Dowker, K. P.

PY - 2001/1/1

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N2 - 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.

AB - 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.

KW - Cladding mode

KW - Core mode

KW - Index sensors

KW - Leaky mode

KW - Long-period grating

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DO - 10.1088/0957-0233/12/10/314

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EP - 1713

JO - Measurement Science and Technology

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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