Abstract An all-optical fiber modulator with a graphene interlayer is proposed and calculated numerically. Graphene has excellent optical characteristics such as wide optical bandwidth, ultra-fast response and zero band gap, which makes the modulator cover the whole C and S band. Modulation rate is only limited by the inherent carrier relaxation time of graphene. We also deduced the mechanism of all-optical modulator based on graphene theoretically, and established a simple correspondence between the intensity of optical signal and the conductivity of graphene. The theoretical calculation results show that the slot structure can effectively improve the effect of graphene on the electric field distribution. The length of the slot structure is only 1.59 mm and the insertion loss can reach 1dB when modulation depth of 20 dB is achieved. The manufacturing tolerance of the structure is 35.42% of the whole device. The modulator based on a single-mode fiber that can be directly fused to the all-optical network and has broad application prospects.

中文翻译：

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具有石墨烯夹层的全光纤调制器

摘要 提出并数值计算了一种具有石墨烯夹层的全光纤调制器。石墨烯具有宽光带宽、超快响应和零带隙等优异的光学特性，使得调制器覆盖了整个C和S波段。调制率仅受石墨烯固有载流子弛豫时间的限制。我们还从理论上推导出了基于石墨烯的全光调制器的机理，并建立了光信号强度与石墨烯电导率之间的简单对应关系。理论计算结果表明，缝隙结构可以有效改善石墨烯对电场分布的影响。缝隙结构长度仅为1.59mm，达到20dB调制深度时插入损耗可达1dB。该结构的制造公差为整个器件的35.42%。基于单模光纤的调制器可以直接融合到全光网络中，具有广阔的应用前景。