title: Apodized distributed feedback fiber laser with asymmetrical outputs for multiplexed sensing applications.
abstract: 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.
authors.affiliation: Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences, Jinan, Shandong 250014, China. qihf@sdu.edu.cn
authors.forename: Haifeng
authors.initials: H
authors.lastname: Qi
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Song
authors.forename: Shujuan
authors.initials: S
authors.lastname: Li
authors.forename: Jian
authors.initials: J
authors.lastname: Guo
authors.forename: Chang
authors.initials: C
authors.lastname: Wang
authors.forename: Gang-Ding
authors.initials: GD
authors.lastname: Peng
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers