Open AccessLP01-LP11a mode converters based on long-period fiber gratings in a two-mode polarization-maintaining photonic crystal fiber
Author(s) -
Xiaohui Zhang,
Yange Liu,
Zhi Wang,
Jie Yu,
Hongwei Zhang
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.007013
Subject(s) - optics , photonic crystal fiber , converters , long period fiber grating , materials science , fiber bragg grating , polarization (electrochemistry) , mode volume , grating , optoelectronics , single mode optical fiber , polarization maintaining optical fiber , optical fiber , wavelength , physics , fiber optic sensor , voltage , chemistry , quantum mechanics
A long-period fiber grating (LPFG) mode converter based on a two-mode polarization-maintaining photonic crystal fiber (PM-PCF) is proposed and demonstrated. The mode converters realize conversions between the LP 01 modes and LP 11a modes with parallel polarization directions. Different from typical conventional mode converters, the PM-PCF-LPFG mode converters most notably can separate out two linearly polarized LP 11a modes at different wavelengths. The highest mode-conversion efficiency is more than 99%. In addition, the bandwidth of the mode converter is adjustable by changing the grating number of the LPFG.