TY - JOUR
T1 - Modelling of long-period fibre grating response to refractive index higher than that of cladding
AU - Hou, Ruozhou
AU - Ghassemlooy, Zabih
AU - Hassan, Aseel Kadhim
AU - Lu, Chao
AU - Dowker, K.
PY - 2001
Y1 - 2001
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.
UR - https://www.scopus.com/pages/publications/0035476733
U2 - 10.1088/0957-0233/12/10/314
DO - 10.1088/0957-0233/12/10/314
M3 - Article
SN - 0957-0233
VL - 12
SP - 1709
EP - 1713
JO - Measurement Science and Technology
JF - Measurement Science and Technology
IS - 10
ER -