Fiber Bragg grating spectra in multimode optical fibers

Author

Lu, Changgui ; Cui, Yiping

Author_Institution

Dept. of Electr. Eng., Southeast Univ., Nanjing, China

Volume

24

Issue

1

fYear

2006

Firstpage

598

Lastpage

604

Abstract

Bragg gratings in optical fibers in multimode propagation are investigated theoretically by using the coupled-mode theory and considering two modes coupling. Bragg gratings in multimode fibers (MMFBGs) show multiple reflection peaks due to the coupling between all bounded modes. The reflection spectra depend on the excitation condition of the bounded modes. A numerical method based on the fourth-order Runge-Kutta formula is developed to solve the coupled equations. The reflection spectra of Bragg gratings with sinusoidal and square refractive index modulations were simulated. The asymmetric change of refractive index in the cross section is also considered here. The spectra characteristics and potential applications of these gratings are discussed.

Keywords

Bragg gratings; Runge-Kutta methods; coupled mode analysis; optical fibre theory; reflectivity; refractive index; bounded modes; coupled-mode theory; fiber Bragg grating spectra; fourth-order Runge-Kutta formula; multimode optical fibers; reflection spectra; refractive index modulation; Bragg gratings; Diffraction gratings; Fiber gratings; Optical coupling; Optical fiber communication; Optical fiber devices; Optical fiber sensors; Optical fiber theory; Optical fibers; Optical reflection; Coupled-mode theory; Runge–Kutta formula; fiber Bragg grating; multimode fiber (MMF);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2005.859841

Filename

1589091