Open AccessCalculation and simulation of optical fiber core and cladding mode effective refractive index
Author(s) -
Lijun Li,
Lai Yong-Zheng,
Xingzhen Bai,
Chao Liu,
Xuemei Yuan,
Xu Zhang,
Guan Jin-Peng,
Jiaming Shi,
Jing Li
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.140201
Subject(s) - cladding (metalworking) , step index profile , optics , radiation mode , long period fiber grating , normalized frequency (unit) , graded index fiber , optical fiber , materials science , refractive index , computation , mode volume , refractive index profile , single mode optical fiber , computer science , physics , fiber optic sensor , algorithm , composite material , phase locked loop , frequency synthesizer , phase noise
The accurate computation of effective refractive index of optical fiber core and the cladding mode are needed for the fiber structure design, mode dispersion analysis and fiber grating mode coupling research. In this paper, based on three layered optical fiber waveguide model and its accurate eigenvalue equation, by using the cut string algorithm the effective refractive index of core mode is solved. At the same time the computation results are verified by using COMSOL software. By using interval traversal algorithm the effective refractive index of cladding mode is computed. Compared with the existing algorithms, this method can avoid the loss of root during the calculation. It can also avoid the generation of odd point and can keep the normality of each mode. The simulation is based on Mathematica software. The curves relating effective refractive index of core and cladding mode to wavelength are obtained.