Open AccessApodized distributed feedback fiber laser with asymmetrical outputs for multiplexed sensing applications
Author(s) -
Haiyu Qi,
Zhiqiang Song,
Shujuan Li,
Jian Guo,
Chang Wang,
Gang-Ding Peng
Publication year - 2013
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.21.011309
Subject(s) - apodization , optics , fiber bragg grating , laser linewidth , multiplexing , materials science , fiber laser , relative intensity noise , distributed feedback laser , longitudinal mode , laser , semiconductor laser theory , physics , computer science , telecommunications
The spectral characteristics of four different types of apodized fiber Bragg gratings with a single π phase shift are analyzed based on the simulation. The 2-discrete Gaussian apodization is proved to have the most effective suppression to grating side mode. A novel asymmetrical distributed feedback fiber laser based on this apodization structure is presented and fabricated as well. The grating has a -20 dB side-mode suppression. The laser exhibits a high power ratio of backward to forward outputs. It has a relative intensity noise of -90 dB/Hz and a linewidth of 20k Hz operating in a single polarization longitudinal mode.