Acousto-optic generation of orbital angular momentum states of light in a tapered optical fiber

被引：4
|
作者：
Song, Changkeun [1 ]
Park, Hee Su [2 ]
Song, Kwang Yong [3 ]
Kim, Byoung Yoon [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Phys, 291 Daehak Ro, Daejeon 34141, South Korea
[2] Korea Res Inst Stand & Sci, 267 Gajeong Ro, Daejeon 34113, South Korea
[3] Chung Ang Univ, Dept Phys, 84 Heukseok Ro, Seoul 06974, South Korea
来源：
CURRENT APPLIED PHYSICS | 2018年 / 18卷 / 11期
关键词：
Orbital angular momentum; Acoustooptic couplers; Multiplexing; Optical fiber communication; Optical fiber applications; LONG-PERIOD FIBER; MODE CONVERTER; TRANSMISSION;
D O I：
10.1016/j.cap.2018.08.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We demonstrate an acousto-optic mode converter based on a tapered optical fiber to efficiently generate orbital angular momentum states of light. In our scheme an acoustic wave is deployed to the waist of tapered optical fiber where two degenerate HE21 modes leading to + 1 and -1 orbital angular momentum eigen-modes are resonantly excited. The excitation of TM01 and TE01 modes is suppressed by enlarging the intermodal index difference between near-degenerate spatial modes. Numerical calculation for optimization of the taper diameter is provided. The experimental characterization of generated states is performed by analyzing the output far-field pattern and the spatial interference fringes with a uniform reference beam.
引用
收藏
页码：1441 / 1446
页数：6
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