Fiber-based mode converter for generating optical vortex beams

被引：24

作者：

Chen, Ruishan ^{[1
]}

Wang, Jinghao ^{[1
]}

Zhang, Xiaoqiang ^{[1
,2
]}

Yao, Junna ^{[1
]}

Ming, Hai ^{[1
]}

Wang, Anting ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Peoples R China

[2] Hefei Gen Machinery Res Inst, Hefei 230031, Peoples R China

来源：

OPTO-ELECTRONIC ADVANCES | 2018年 / 1卷 / 07期

基金：

中国国家自然科学基金;

关键词：

optical vortices; fiber optics; singular optics; mode-division multiplexing; ORBITAL ANGULAR-MOMENTUM; GAUSSIAN-BEAM; LIGHT;

D O I：

10.29026/oea.2018.180003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, an all-fiber-based mode converter for generating orbital angular momentum (OAM) beams is proposed and numerically investigated. Its structure is constructed by cascading a mode selective coupler (MSC) and an inner elliptical cladding fiber (IECF). OAM modes refer to a combination of two orthogonal LP(lm )modes with a phase difference of +/-pi/2. By adjusting the parameters and controlling the splicing angle of MSC and IECF appropriately, higher-order OAM modes with topological charges of l = +/- 1, +/- 2, +/- 3 can be obtained with the injection of the fundamental mode LP01, resulting in a mode-conversion efficiency of almost 100%. This achievement may pave the way towards the realization of a compact, all-fiber, and high-efficiency device for increasing the transmission capacity and spectral efficiency in optical communication systems with OAM mode multiplexing.

引用

页码：1 / 7

页数：7

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