WS2 saturable absorber for dissipative soliton mode locking at 1.06 and 1.55 μm

Dong Mao, Shengli Zhang, Yadong Wang, Xuetao Gan, Wending Zhang, Ting Mei, Yonggang Wang, Yishan Wang, Haibo Zeng, Jianlin Zhao

科研成果: 期刊稿件文章同行评审

206 引用 (Scopus)

摘要

Transition-metal dichalcogenides, such as tungsten disulfide (WS2) and molybdenium disulfide (MoS2), are highly anisotropic layered materials and have attracted growing interest from basic research to practical applications due to their exotic physical property that may complement graphene and other semiconductor materials. WS2 nanosheets are found to exhibit broadband nonlinear saturable absorption property, and saturable absorbers (SAs) are fabricated by depositing WS2 nanosheets on side-polished fibers. Attributing to the weak evanescent field and long interaction length, the WS2 nanosheets are not exposed to large optical intensity, which allows the SA to work at the high-power regime. The SAs are used to mode lock erbium- and ytterbium-doped fiber lasers with normal dispersion, producing trains of dissipative soliton at 1.55 and 1.06 μm respectively. Simulations show that the bandgap of WS2 nanosheets decreases from 1.18 to 0.02 and 0.65 eV by introducing W and S defects respectively, which may contribute to the broadband saturable absorption property of the WS2.

源语言英语
页(从-至)27509-27519
页数11
期刊Optics Express
23
21
DOI
出版状态已出版 - 19 10月 2015

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