Bi2Se3 as a saturable absorber for ultrafast photonic applications of Yb-doped fiber lasers

作者：Li, Kexuan; Tian, Jinrong; Song, Yanrong^*; Liu, Jinghui; Guoyu, Heyang; Xu, Runqin; Wang, Meng; Fang, Xiaohui

来源：Optical Engineering, 2016, 55(3): 036110.

DOI：10.1117/1.OE.55.3.036110

• fiber lasers
• Q-switched mode-locked
• continuous-wave mode-locked
• topological insulator

We experimentally demonstrated a Q-switched mode-locked (QML) and a continuous-wave mode-locked (CWML) ytterbium-doped fiber lasers with topological insulator: Bi2Se3 as saturable absorber (SA) in all normal dispersion regime. The Bi2Se3-SA is conventionally composited by embedding Bi2Se3 nanoplatelets into polyvinyl alcohol thin film, which provides a modulation depth of 7.6% and a saturation intensity of 38.9 MW/cm(2). Based on this SA, with different cavity length, ytterbium-doped fiber laser can be operated at QML and CWML state, respectively. In the QML operation, a Q-switched envelope has the shortest pulse width of 1.12 mu s and the tunable repetition rate from 96 to 175 kHz. The largest pulse envelope energy is 39.6 nJ, corresponding to average output power of 6.93 mW. In the CWML operation, an environmentally stable dissipative soliton laser pulse with pulse duration of similar to 210 ps is obtained. The single pulse energy is 0.83 nJ with the repetition rate of 11.38 MHz at the wavelength of 1037 nm.

• 出版日期2016-3
• 单位中国人民武装警察部队学院; 北京工业大学