Femtosecond pulse erbium-doped fiber laser by a few-layer MoS(2) saturable absorber.

  title={Femtosecond pulse erbium-doped fiber laser by a few-layer MoS(2) saturable absorber.},
  author={Hao Liu and Ai-Ping Luo and Fu-Zao Wang and Rui Tang and Meng Liu and Zhi-Chao Luo and Wen-Cheng Xu and Chu-jun Zhao and Han Zhang},
  journal={Optics letters},
  volume={39 15},
We report on the generation of a femtosecond pulse in a fiber ring laser by using a polyvinyl alcohol (PVA)-based molybdenum disulfide (MoS(2)) saturable absorber (SA). With a saturable optical intensity of 34  MW/cm(2) and a modulation depth of ∼4.3%, the PVA-based MoS(2) SA had been employed with an erbium-doped fiber ring laser as a mode locker. The mode-locking operation could be achieved at a low pump threshold of 22 mW. A ∼710  fs pulse centered at 1569.5 nm wavelength with a repetition… CONTINUE READING
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