Design and realization of multiple quarter-wave phase-shifts UV-written bandpass filters in optical fibers

Author

Bakhti, Fatima ; Sansonetti, Pierre

Author_Institution

Telecom Res. Div., Alcatel Alsthom Recherche, Marcoussis, France

Volume

15

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1433

Lastpage

1437

Abstract

Ultraviolet (UV)-written optical fiber bandpass filters based on multiple quarter-wave phase-shifts, up to eight, are presented and modeled. It is demonstrated that the shape of the bandpass peak can be tailored by optimization of the phase-shifts locations. We show that flat top bandpass peak with negligible ripples (<0.01 dB) at the top can be designed and that a tradeoff between nearly rectangular shape and stopband width occurs when gratings containing more than two phase-shifts are to be used. We also present experimental spectral responses of gratings with up to three phase-shifts and comparisons with theoretical results

Keywords

band-pass filters; diffraction gratings; optical design techniques; optical fabrication; optical fibre filters; optical fibre theory; optical fibres; optimisation; bandpass peak; flat top bandpass peak; multiple quarter-wave phase-shifts; multiple quarter-wave phase-shifts UV-written bandpass filters; nearly rectangular shape; negligible ripples; optical fibers; optical fibre filters; optical fibre gratings; phase-shifts; phase-shifts locations; stopband width; Band pass filters; Bragg gratings; Fiber gratings; Filtering; Optical design; Optical fiber filters; Optical fibers; Optical filters; Shape; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.618375

Filename

618375