Model of Bragg grating written in subwavelength-diameter fiber taper

Author

Zhao, Ping ; Zhang, Jihua ; Wu, Zhao ; Zhang, Xinliang

Author_Institution

Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China

fYear

2011

fDate

13-16 Nov. 2011

Firstpage

1

Lastpage

5

Abstract

We come up with a model of subwavelength-diameter fiber taper-based Bragg gratings (SWDFT-BGs) and numerically investigated the chirp characteristics of Bragg gratings written in local single-mode fiber tapers based on coupled-mode theory and transfer matrix method. The effective modal refractive index varies along adiabatic subwavelength-diameter fiber tapers (SWDFTs), which results in an effective chirp in grating period. Additionally, SWDFT-BGs with full width at half maximum (FWHM) up to 4.9 nm and time-delay slope over 25 ps/nm were achieved in simulations. This offers an idea for fabricating single-mode chirped fiber Bragg gratings using uniform phase-mask and paves ways for waveguide dispersion engineering and wide-bandwidth optical filters.

Keywords

Bragg gratings; chirp modulation; masks; optical fibre couplers; optical fibre fabrication; refractive index; adiabatic subwavelength-diameter fiber taper; chirp characteristics; coupled-mode theory; local single-mode fiber tapers; refractive index; single-mode chirped fiber Bragg gratings; time-delay slope; transfer matrix; uniform phase-mask; waveguide dispersion engineering; wide-bandwidth optical filters; Abstracts; Numerical models; Bragg grating; Microfiber; fiber taper;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Photonics Conference and Exhibition, 2011. ACP. Asia

Conference_Location

Shanghai

ISSN

2162-108X

Print_ISBN

978-0-8194-8961-6

Type

conf

DOI

10.1117/12.904662

Filename

6210635