%A Ping-Xue Li(李平雪), Yi-Fei Yao(姚毅飞), Jun-Jie Chi(池俊杰), Hao-Wei Hu(胡浩伟), Guang-Ju Zhang(张光举), Bo-Xing Liang(梁博兴), Meng-Meng Zhang(张孟孟), Chun-Mei Ma(马春媚), Ning Su(苏宁) %T 980-nm all-fiber mode-locked Yb-doped phosphate fiber oscillator based on semiconductor saturable absorber mirror and its amplifier %0 Journal Article %D 2016 %J Chin. Phys. B %R 10.1088/1674-1056/25/8/084207 %P 84207-084207 %V 25 %N 8 %U {https://cpb.iphy.ac.cn/CN/abstract/article_118830.shtml} %8 2016-08-05 %X A 980-nm semiconductor saturable absorber mirror (SESAM) mode-locked Yb-doped phosphate fiber laser is demonstrated by using an all-fiber linear cavity configuration. Two different kinds of cavity lengths are introduced into the oscillator to obtain a robust and stable mode-locked seed source. When the cavity length is chosen to be 6 m, the oscillator generates an average output power of 3.5 mW and a pulse width of 76.27 ps with a repetition rate of 17.08 MHz. As the cavity length is optimized to short, 4.4-mW maximum output power and 61.15-ps pulse width are produced at a repetition rate of 20.96 MHz. The output spectrum is centered at 980 nm with a narrow spectral bandwidth of 0.13 nm. In the experiment, no undesired amplified spontaneous emission (ASE) nor harmful oscillation around 1030 nm is observed. Moreover, through a two-stage all-fiber-integrated amplifier, an output power of 740 mW is generated with a pulse width of 200 ps.