A mode generator and multiplexer at visible wavelength based on all-fiber mode selective coupler

Yao Han; Shi Fan; Wu Zhaoyang; Xu Xinzhu; Wang Teng; Liu Xiaomin; Xi Peng; Pang Fufei; Zeng Xianglong

doi:10.1515/nanoph-2020-0050

Nanophotonics (Mar 2020)

A mode generator and multiplexer at visible wavelength based on all-fiber mode selective coupler

Yao Han,
Shi Fan,
Wu Zhaoyang,
Xu Xinzhu,
Wang Teng,
Liu Xiaomin,
Xi Peng,
Pang Fufei,
Zeng Xianglong

Affiliations

Yao Han: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, P.R. China
Shi Fan: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, P.R. China
Wu Zhaoyang: Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, P.R. China
Xu Xinzhu: Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, P.R. China
Wang Teng: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, P.R. China
Liu Xiaomin: Max Planck Institute for Polymer Research, 55128 Mainz, Germany
Xi Peng: Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, P.R. China
Pang Fufei: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, P.R. China
Zeng Xianglong: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, P.R. China

DOI: https://doi.org/10.1515/nanoph-2020-0050
Journal volume & issue: Vol. 9, no. 4
pp. 973 – 981

Abstract

Read online

Using an all-fiber mode selective coupler (MSC) at the visible band, here we experimentally demonstrate a generating and wavelength multiplexing scheme for the cylindrical vector (CV) and vortex beams (VBs). The proposed MSCs act as efficient mode converters to produce spectrally insensitive high-order modes (HOMs) at the wavelength ranging from 450 to 980 nm, which have broad operation bandwidth (more than 7 nm), high mode conversion efficiency (94%), and purity (98%), and low insert loss (below 0.5 dB). By adjusting the polarization state and the phase shift of linear polarization (LP)11 mode respectively, the donut-shaped CVs and circular-polarization VBs are achieved. The focused intensity distribution of the donut beam on the cross- and axial-sections is monitored by using a confocal system. The all-fiber solution of producing and multiplexing HOMs opens a new route for stimulated emission depletion microscopy applications.

Published in Nanophotonics

ISSN: 2192-8606 (Print); 2192-8614 (Online)
Publisher: De Gruyter
Country of publisher: Germany
LCC subjects: Science: Physics
Website: https://www.degruyter.com/journal/key/nanoph/html#submit

About the journal

Abstract

Keywords