All-fiber spatial rotation manipulation for radially asymmetric modes

Qi Mo; Zhikun Hong; Dawei Yu; Songnian Fu; Liang Wang; Kyunghwan Oh; Ming Tang; Deming Liu

doi:10.1038/s41598-017-02781-2

All-fiber spatial rotation manipulation for radially asymmetric modes

Sci Rep. 2017 May 31;7(1):2539. doi: 10.1038/s41598-017-02781-2.

Authors

Qi Mo^{1

2}, Zhikun Hong¹, Dawei Yu¹, Songnian Fu³, Liang Wang⁴, Kyunghwan Oh⁵, Ming Tang¹, Deming Liu¹

Affiliations

¹ Wuhan National Laboratory for Optoelectronics, and School of optical and electronic information, Huazhong University of Science and Technology, Wuhan, 430074, China.
² Wuhan Research Institute of Posts and Telecommunications, 88# Youkeyuan Road, Hongshan District, Wuhan, 430074, China.
³ Wuhan National Laboratory for Optoelectronics, and School of optical and electronic information, Huazhong University of Science and Technology, Wuhan, 430074, China. songnian@hust.edu.cn.
⁴ Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong, Hong Kong.
⁵ Photonic Device Physics Laboratory, Department of Physics, Yonsei University, Seoul, 120-749, South Korea.

Abstract

We propose and experimentally demonstrate spatial rotation manipulation for radially asymmetric modes based on two kinds of polarization maintaining few-mode fibers (PM-FMFs). Theoretical finding shows that due to successful suppression of both polarization and spatial mode coupling, the spatial rotation of radially asymmetric modes has an excellent linear relationship with the twist angle of PM-FMF. Both elliptical core and panda type FMFs are fabricated, in order to realize manageable spatial rotation of LP₁₁ mode within ±360° range. Finally, we characterize individual PM-FMF based spatial orientation rotator and present comprehensive performance comparison between two PM-FMFs in terms of insertion loss, temperature sensitivity, linear polarization maintenance, and mode scalability.

Publication types

Research Support, Non-U.S. Gov't