Guo Kun, Yu Qiang, Liu Fangqi, Deng Haiqin, Yi Tianan, Ren Bo, Su Wei, Zhu Sicong, Wang Zhiqiang, Wu Jian, Zhou Pu
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
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.
Nanomaterials (Basel). 2022 Jan 24;12(3):378. doi: 10.3390/nano12030378.
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.
硫化镓（GaS）具有六边形结构，因其类似石墨烯的结构和衍生的光学特性而受到广泛关注。在此，通过化学气相合成获得了高质量的GaS，然后通过印章辅助定位转移技术将其制备成光纤端面上的可饱和吸收体。由于优化的厚度和腔集成形式，材料的稳定性和激光损伤阈值得以保持。通过构建基于GaS的掺铒锁模光纤激光器，探索了GaS在非线性光学方面的潜力。实现了单脉冲序列的稳定飞秒（~448 fs）锁模运行，并记录到了稳健的锁模运行（>30天）。实验结果表明了GaS在多功能超快高功率激光器方面的潜力，并促进了对非线性光学和光子学中类似石墨烯材料的持续研究。
