All-optical control of microfiber resonator by graphene's photothermal effect

作者：Yadong Wang, Xuetao Gan, Chenyang Zhao, Liang Fang, Dong Mao, Yiping Xu, Fanlu Zhang, Teli Xi, Liyong Ren, Jianlin Zhao · 发表于：Applied Physics Letters · 年份：2016 · DOI：10.1063/1.4947577 · 被引用次数：85 · 研究领域：Photonic and Optical Devices、Advanced Fiber Laser Technologies、Optical Network Technologies

We demonstrate an efficient all-optical control of microfiber resonator assisted by graphene's photothermal effect. Wrapping graphene onto a microfiber resonator, the light-graphene interaction can be strongly enhanced via the resonantly circulating light, which enables a significant modulation of the resonance with a resonant wavelength shift rate of 71 pm/mW when pumped by a 1540 nm laser. The optically controlled resonator enables the implementation of low threshold optical bistability and switching with an extinction ratio exceeding 13 dB. The thin and compact structure promises a fast response speed of the control, with a rise (fall) time of 294.7 μs (212.2 μs) following the 10%–90% rule. The proposed device, with the advantages of compact structure, all-optical control, and low power acquirement, offers great potential in the miniaturization of active in-fiber photonic devices.