Research on a novel composite structure Er³⁺-doped DBR fiber laser with a π-phase shifted FBG

A simple composite cavity structure Er³⁺-doped fiber laser was proposed and demonstrated experimentally. The resonant cavity consists of a pair of uniform fiber Bragg gratings (FBGs) and a π-phase shifted FBG. By introducing the π-phase shifted FBG into the cavity as the selective wavelength compone...

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Bibliographic Details
Published in:Optics express 2013-09, Vol.21 (19), p.22515-22522
Main Authors: Zhao, Yanjie, Chang, Jun, Wang, Qingpu, Ni, Jiasheng, Song, Zhiqiang, Qi, Haifeng, Wang, Chang, Wang, Pengpeng, Gao, Liang, Sun, Zhihui, Lv, Guangping, Liu, Tongyu, Peng, Gangding
Format: Article
Language:English
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Summary:A simple composite cavity structure Er³⁺-doped fiber laser was proposed and demonstrated experimentally. The resonant cavity consists of a pair of uniform fiber Bragg gratings (FBGs) and a π-phase shifted FBG. By introducing the π-phase shifted FBG into the cavity as the selective wavelength component, it can increase the effective length of the laser cavity and suppress the multi-longitudinal modes simultaneously. The narrow linewidth of 900 Hz and low RIN of -95 dB/Hz were obtained. And the lasing wavelength was rather stable with the pump power changing. The SMRS was more than 67 dB. The results show that the proposed fiber laser has a good performance and considerable potential application for fiber sensor and optical communication.
ISSN:1094-4087
DOI:10.1364/OE.21.022515