Synthesis of Hexagonal Structured GaS Nanosheets for Robust Femtosecond Pulse Generation
Kun Guo,
Qiang Yu,
Fangqi Liu,
Haiqin Deng,
Tianan Yi,
Bo Ren,
Wei Su,
Sicong Zhu,
Zhiqiang Wang,
Jian Wu,
Pu Zhou
Affiliations
Kun Guo
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Qiang Yu
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Fangqi Liu
Hubei Province Key Laboratory of Systems Science in Metallurgical Process, College of Science, The State Key Laboratory for Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Haiqin Deng
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Tianan Yi
College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China
Bo Ren
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Wei Su
College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China
Sicong Zhu
Hubei Province Key Laboratory of Systems Science in Metallurgical Process, College of Science, The State Key Laboratory for Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
Zhiqiang Wang
Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK
Jian Wu
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Pu Zhou
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
Gallium sulfide (GaS), with a hexagonal structure, has received extensive attention due to its graphene-like structure and derived optical properties. Here, high-quality GaS was obtained via chemical vapor synthesis and then prepared as a saturable absorber by the stamp-assisted localization-transfer technique onto fiber end face. The stability of the material and the laser damage threshold are maintained due to the optimized thickness and the cavity integration form. The potential of the GaS for nonlinear optics is explored by constructing a GaS-based Erbium-doped mode-locked fiber laser. Stable femtosecond (~448 fs) mode-locking operation of the single pulse train is achieved, and the robust mode-locked operation (>30 days) was recorded. Experimental results show the potential of GaS for multi-functional ultrafast high-power lasers and promote continuous research on graphene-like materials in nonlinear optics and photonics.
