An all-optical modulator based on a stereo graphene–microfiber structure  

作　　者：Jin-Hui Chen Bi-Cai Zheng Guang-Hao Shao Shi-Jun Ge Fei Xu Yan-Qing Lu 

机构地区：[1]National Laboratory of Solid State Microstructures,Collaborative Innovation Center of Advanced Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China

出　　处：《Light(Science & Applications)》2015年第1期42-46,共5页光（科学与应用)（英文版）

基　　金：This work is sponsored by the National 973 program(2012CB921803 and 2011CBA00205);the National Science Fund of China under grants 61225026,61322503,61457069,61435008 and 61490714;the Fundamental Research Funds for the Central Universities.

摘　　要：An in-line,all-optical fiber modulator based on a stereo graphene–microfiber structure(GMF)utilizing the lab-on-rod technique was demonstrated in this study.Owing to its unique spring-like geometry,an ultra-long GMF interaction can be achieved,and a modulation depth of,7.5 dB(,2.5 dB)and a modulation efficiency of,0.2 dB mW^(-1)(,0.07 dB mW^(-1))were demonstrated for two polarization states.The modulation depth and modulation efficiency are more than one order of magnitude larger than those of other graphene–microfiber hybrid all-optical modulators,although at the cost of a higher insertion loss.By further optimizing the transferring and cleaning process,the upper limit of the modulation depth is mainly determined by the loss from the intrinsic absorption,which depends on the light–graphene interaction.Then,the modulator can quickly switch between the on-state and the off-state with a theoretically maximized modulation depth of tens of decibels.This modulator is compatible with the current fiber-optic communication systems and may be applied in the near future to meet the impending need for ultrafast optical signal processing.

关 键 词：GRAPHENE MICROFIBER optical modulation POLARIZATION 

分 类 号：TN2[电子电信—物理电子学]