Via careful choice of Er-doped fiber length in the cavity, a widely wavelength-tunable L-band dissipative soliton all-fiber Er-doped laser incorporating a L-band optimized polarizing fiber grating device is experimentally demonstrated. The laser delivers 15.38 ps dissipative soliton pulses centered at 1597.34 nm with 3 dB bandwidth of 34.6 nm under 622 mW pump power. The pulse repetition rate is 23 MHz. After using single mode fiber at external cavity, the pulse duration is compressed to 772 fs. With nonlinear polarization rotation-based intracavity comb filter, the central wavelength of the generated dissipative soliton can be tuned from 1567 nm to 1606 nm with a spectral tuning range of 39 nm, which, to the best of our knowledge, is the widest tuning range yet reported for a dissipative soliton fiber laser working in communication band.
Bibliographical note© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Funding: National Natural Science Foundation of China (NSFC) (61605107,61505244); the Open Fund of IPOC2017B010 (Beijing University of Post and Telecommunications, BUPT) and the Open fund of Key Laboratory of Opto-electronic Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, P. R. China (2018KFKT009); Young Eastern Scholar Program at Shanghai Institutions of Higher Learning (QD2015027); “Young 1000 Talent Plan” Program of China.