Open AccessPhase-shifted bandpass filter fabrication through CO2 laser irradiation
Author(s) -
Li Xia,
Ping Shum,
Chao Lu
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.005878
Subject(s) - optics , materials science , fiber bragg grating , band pass filter , laser , fiber laser , optoelectronics , physics
We report what is believed to be the first example of phase shifted bandpass filter written on the fiber Bragg grating (FBG) through CO2 laser irradiation. The filter is realized by fiber residual stress relaxation effect. The induced phase shifts in different position can produce multiple narrow passbands within the stopband of the FBG. The produced filter is compact, stable, cost effective, and its bandpass profile is easy to control.