材料科学
光学
折射率
石墨烯
芯(光纤)
光电子学
物理
纳米技术
复合材料
作者
Rang Chu,Chunying Guan,Yutao Bo,Jing Liu,Jinhui Shi,Jing Yang,Peng Ye,Ping Li,Jun Yang,Libo Yuan
出处
期刊:Optics Letters
[The Optical Society]
日期:2019-12-20
卷期号:45 (1): 177-177
被引量:26
摘要
We investigated an all-optical phase shifter and switch based on a graphene decorated side-polished twin-core fiber (TCF) Michelson interferometer (MI). The MI was fabricated by tapering the splicing point between the TCF and single-mode fiber. The flat surface of exposed polished core in the TCF was coated with monolayer graphene. A 980 nm pump laser is used to produce a photothermal effect. The graphene’s ohmic heating changes the effective refractive index of the exposed core, resulting in the phase shift of the MI. The MI with a polished length of 5 mm has a significant modulation phase shift with a nearly linear slope of 0.0102 π / m W near the wavelength of 1550 nm and can obtain an extinction ratio of 7 dB for optical switching with a rise (fall) time of 55.8 ms (15.5 ms). The high-density integration and all-optical control enable the proposed device to have great potential in the miniaturization of optical devices and all-optical signal processing.
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