Phase-shifted Bragg grating filters with symmetrical structures

Author

Wei, Li ; Lit, John W.Y.

Author_Institution

Dept. of Phys., Waterloo Univ., Ont., Canada

Volume

15

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1405

Lastpage

1410

Abstract

A comprehensive theoretical analysis of the compound phase-shifted uniform fiber Bragg grating (FBG) filter is presented. The transmission characteristics are examined by a transfer matrix formulation. It is shown that the transmission spectrum of such a filter is significantly controlled by the ratio of the grating lengths. By suitably choosing the ratio, a quasi-flat-top spectrum may be obtained. The general condition for the optimum case is derived. This characteristic makes the compound phase-shifted uniform FBG filter particularly advantageous for applications in wavelength-multiplexed optic-fiber communication systems

Keywords

diffraction gratings; optical fibre filters; optical fibre theory; optical fibres; symmetry; wavelength division multiplexing; WDM; compound phase-shifted uniform FBG filter; compound phase-shifted uniform fiber Bragg grating filter; comprehensive theoretical analysis; grating lengths; optimum case; phase-shifted Bragg grating filters; quasi-flat-top spectrum; symmetrical structures; transfer matrix formulation; transmission characteristics; transmission spectrum; wavelength-multiplexed optic-fiber communication systems; Band pass filters; Bragg gratings; Communication systems; Fiber gratings; Optical fiber filters; Optical filters; Optical reflection; Passband; Physics; Symmetric matrices;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.618363

Filename

618363