石墨烯覆盖微纳光纤复合波导全光优先吸收特性

莫军; 冯国英; 廖宇; 杨莫愁; 周寿桓

doi:10.11884/HPLPB201830.180079

石墨烯覆盖微纳光纤复合波导全光优先吸收特性

doi: 10.11884/HPLPB201830.180079

莫军^1,,
冯国英^1, ,,
廖宇¹,
杨莫愁¹,
周寿桓^{1, 2}

1.
四川大学电子信息学院, 成都 610065
2.
华北光电技术研究所, 北京 100015

基金项目:

国家自然科学基金项目 11574221

详细信息

作者简介:
莫军(1991－), 男，硕士，从事光调制器研究；mojun@stu.scu.edu.cn

通讯作者:
冯国英(1969－), 女，教授，博士生导师，从事激光微纳工程研究；guoing_feng@scu.edu.cn

中图分类号: TN25
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- 被引次数: 0
出版历程
- 收稿日期: 2018-03-21
- 修回日期: 2018-04-27
- 刊出日期: 2018-08-15

All-optical preferential absorption characteristics of graphene-coated microfiber composite waveguide

Mo Jun^1
,,
Feng Guoying^{1
, ,},
Liao Yu¹,
Yang Mochou¹,
Zhou Shouhuan^{1, 2}

1.
College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
2.
North China Research Institute of Electro-Optics, Beijing 100015, China

摘要

摘要: 利用二氧化碳激光器加热法，将普通单模光纤拉制成微纳光纤，用湿法转移石墨烯覆盖在微纳光纤上构成复合波导，不同波长的光通过耦合器进入复合波导，以倏逝波的形式与石墨烯相互作用，开展石墨烯优先吸收特性的研究。当短波作为泵浦光时，随着入射强度的增长，测得输出端长波信号光光谱的变化，获得了约3.5 dB的调制深度，0.62 dB·mW^-1的调制效率。当长波作为泵浦光并改变入射光强时，在输出端测得作为信号光的短波透过率变化约1.9%。实验结果表明，随着任意波长泵浦光入射光强的增长，复合波导对其表现出优先吸收的特性。实验还测试了长波和短波分别经过复合波导后透过率随输入功率的变化，得出长波的透过率增加速度比短波更快，并从能带和倏逝波两方面作出了对应的理论分析。
- 石墨烯 /
- 微纳光纤 /
- 复合波导 /
- 全光调制 /
- 优先吸收
Abstract: In this paper, the normal single-mode fiber is pulled into microfiber by the method of carbon dioxide laser heating, wet method is used to transfer graphene and cover microfiber to form a composite waveguide. The light of different wavelengths enters the composite waveguide through the coupler, interacts with graphene in the form of evanescent waves, thus the research experiment of preferential absorption characteristic is carried out. When a short wave light was used as a pump light, changes in the long wave spectrum with the increase of incident intensity were measured, obtaining a modulation depth of about 3.5 dB, and a modulation efficiency of 0.62 dB·mW^-1. When the long wave light was used as the pump light, the light transmittance of the short wave signal was measured to change by ~1.9%. The experimental results show that with the increase of the incident light intensity of the pump light at any wavelength, the composite waveguide exhibits its preferential absorption characteristics. In addition, when the long-wave and short-wave waves passed through the composite waveguide, the transmittance changes with the input power were tested, experiments show that the long-wavelength transmittance increases faster than the short-wavelength transmittance, and the corresponding theoretical analysis can be made from the two aspects of energy band and evanescent wave.
- graphene /
- microfiber /
- composite waveguide /
- all-optical modulation /
- preferential absorption

HTML全文

图 1 单层石墨的拉曼散射谱图, 插图为PMMA/石墨烯膜包裹的微纳光纤实物图

Figure 1. Raman scattering spectrum of single-layer graphite, the inset shows a microfiber wrapped by PMMA/graphene film

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图 2 基于GCM优先吸收实验连接图

Figure 2. Experimental connection diagram based on GCM preferential absorption

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图 3 短波泵浦长波实验

Figure 3. Experiment of short wavelength pumping long wavelength

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图 4 长波泵浦短波实验

Figure 4. Experiment of long wavelength pumping short wavelength

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图 5 透过率随功率的变化

Figure 5. Transmittance changes with power

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图 6 微纳光纤中基模模场分布以及光斑图

Figure 6. Distribution of base mode and spot pattern in microfiber

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图 7 不同光子能量下单层石墨烯吸收特性

Figure 7. Single-layer graphene absorption characteristics under different photon energies

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