Open AccessSuppression of discrete cladding mode resonances in fibre slanted Bragg gratings for gain equalisation
Author(s) -
Emmanuel Kerrinckx,
Arif Hidayat,
P. Niay,
Yves Quiquempois,
M. Douay,
I. Riant,
Carlos De Barros
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.001388
Subject(s) - optics , cladding (metalworking) , cladding mode , materials science , fiber bragg grating , amplitude modulation , grating , flattening , amplitude , optoelectronics , optical fiber , physics , frequency modulation , bandwidth (computing) , fiber optic sensor , polarization maintaining optical fiber , telecommunications , computer science , metallurgy , composite material
In a slanted Bragg grating, coupling between the fundamental guided mode and the counterpropagative cladding modes result in discrete resonances in the transmission spectrum. These resonances are a drawback when Slanted Bragg Gratings are used for gain flattening of fibres amplifiers. A new method based on a chemical etching of the cladding is proposed leading to an overlap of the resonances and a reduction of the amplitude of the modulation. This method can be applied for any value of photo induced modulation amplitude in the SBG.