Nitrogen-doped graphene quantum dots for femtosecond ultrafast pulsed fiber lasers

Yichao Zhang, Guanyun Ding,Dongyun Kai,Xuhuan Xie,Fangteng Zhang,Youjun Zeng,Guanyu Liu,Haoyi Wu,Zhaogang Nie

Optical Fiber Technology（2023）

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摘要

•The N-GQDs aqueous solution changes from saturable absorption to reverse saturable absorption at the input pulse intensity increases.•The carrier relaxation time of N-GQDs is about 143 fs, which is comparable to the carrier relaxation time of graphene.•Picosecond pulses can be generated by an Er-doped fiber laser with N-GQDs aqueous solution saturable absorber.

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关键词

graphene quantum dots,femtosecond ultrafast,lasers,nitrogen-doped

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