Open AccessFree-space to few-mode-fiber coupling under atmospheric turbulence
Author(s) -
Donghao Zheng,
Yan Li,
Erhu Chen,
BeiBei Li,
Deming Kong,
Li Wei,
Jian Wu
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.018739
Subject(s) - optics , free space optical communication , mode volume , single mode optical fiber , fiber , dispersion shifted fiber , polarization maintaining optical fiber , graded index fiber , optical fiber , coupling (piping) , materials science , mode (computer interface) , turbulence , fiber optic sensor , optical communication , physics , computer science , metallurgy , composite material , operating system , thermodynamics
High speed free space optical communication (FSOC) has taken advantages of components developed for fiber-optic communication systems. Recently, with the rapid development of few-mode-fiber based fiber communication systems, few-mode-fiber components might further promote their applications in FSOC system. The coupling efficiency between free space optical beam and few-mode fibers under atmospheric turbulence effect are investigated in this paper. Both simulation and experimental results show that, compared with single-mode fiber, the coupling efficiencies for a 2-mode fiber and a 4-mode fiber are improved by ~4 dB and ~7 dB respectively in the presence of medium moderate and strong turbulence. Compared with single-mode fiber, the relative standard deviation of received power is restrained by 51% and 66% respectively with a 4-mode and 2-mode fiber.
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