Ultra-Broadband All-Optical Graphene Modulator

被引:30
作者
Liao, Y. [1 ,2 ]
Feng, G. Y. [1 ]
Zhou, H. [1 ]
Mo, J. [1 ]
Sun, H. J. [1 ]
Zhou, S. H. [1 ,3 ]
机构
[1] Sichuan Univ, Coll Elect & Informat Engn, Inst Laser & Micro Nano Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Peoples R China
[3] North China Res Inst Electroopt, Beijing 100015, Peoples R China
基金
美国国家科学基金会;
关键词
All-optical modulator; graphene; priority absorption; microfiber; OPTOELECTRONICS; PHOTONICS; DEVICES;
D O I
10.1109/LPT.2018.2800769
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this letter, a monolayer graphene-clad microfiber device is designed to achieve ultra-broadband all-optical modulation. Based on the broadband advantage of graphene, we sufficiently discussed the priority absorption characteristic of graphene and continuous wave light saturated absorption characteristic of composite waveguide. Furthermore, superior to previous related publications which the wavelength of pump light is limited, we pioneered and verified that various wavelength light can be used as pump light to achieve all-optical modulation in the designed device. In our experiment, supercontinuum light with spectrum range (0.48 mu m-1.7 mu m) is modulated by the conventional low-power continuous wave laser diode (808 nm) with pump power under 50 mW. Experimental results for the all-optical modulator achieve modulation depths of similar to 5.7 dB (1310 nm), similar to 6.8 dB (1550 nm), and similar to 7.3 dB (1610 nm), modulation efficiency of similar to 0.11 dBmW(-1) (1310 nm), similar to 0.14 dBmW(-1) (1550 nm), and similar to 0.15 dBmW(-1) (1610 nm), respectively, crossing the O, C, and L bands. The modulation bandwidth reaches 970 nm which is obviously 20 times higher than the modulation bandwidth similar to 50 nm reported in related publications. This all-optical modulator based on graphene microfiber provides an easy and efficient way to modulate the ultra-broadband light with very low pump power.
引用
收藏
页码:661 / 664
页数:4
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