Wang Jianhua, Zhang Lei, Hu Jinmeng, Si Lei, Chen Jinbao, Gu Xijia, Feng Yan
Shanghai Key Laboratory of Solid State Laser and Application, and Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
Appl Opt. 2012 Jun 10;51(17):3801-3. doi: 10.1364/AO.51.003801.
We report a 20 W linearly polarized, spectrally clean Yb-doped fiber laser at 1120 nm with an optical conversion efficiency of 54%. An excellent polarization extinction ratio of more than 23 dB is obtained using fiber Bragg gratings (FBGs) polarization selection technique at all power levels. The results reveal that a Yb-doped fiber laser at 1120 nm could be a promising replacement compared to Raman fiber lasers.
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