Generation and excitation of different orbital angular momentum states in a tunable microstructure optical fiber

被引：28

作者：

Huang, Wei ^{[1
]}

Liu, Yan-ge ^{[1
]}

Wang, Zhi ^{[1
]}

Zhang, Wanchen ^{[1
]}

Luo, Mingming ^{[1
]}

Liu, Xiaoqi ^{[1
]}

Guo, Junqi ^{[1
]}

Liu, Bo ^{[1
]}

Lin, Lie ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Minist Educ, Key Lab Opt Informat Sci & Technol, Tianjin 300071, Peoples R China

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 26期

基金：

中国国家自然科学基金;

关键词：

REFRACTIVE-INDEX; DESIGN;

D O I：

10.1364/OE.23.033741

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A tunable microstructure optical fiber for different orbital angular momentum states generation is proposed and investigated by simulation. The microstructure optical fiber is composed of a high refractive index ring and a hollow core surrounded by four small air holes. The background material of the microstructure fiber is pure silica. The hollow core and the surrounded four small air holes are infiltrated by optical functional material whose refractive index can be modulated via physical parameters, leading to the conversion between circular polarized fundamental mode and different orbital angular momentum states at tunable operating wavelengths. A theoretical model is established and the coupling mechanism is systematically analyzed and investigated based on coupled mode theory. The fiber length can be designed specifically to reach the maximum coupling efficiency for every OAM mode respectively, and can also be fixed at a certain value for several OAM modes generation under tunable refractive index conditions. The proposed fiber coupler is flexible and compact, making it a good candidate for tunable OAM generation and sensing systems. (C) 2015 Optical Society of America

引用

页码：33741 / 33752

页数：12

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