Open AccessMode resolved bend loss in few-mode optical fibers
Author(s) -
Christian Schulze,
Adrian Lorenz,
Daniel Flamm,
Alexander Hartung,
Siegmund Schröter,
Hartmut Bartelt,
Michael Duparré
Publication year - 2013
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.21.003170
Subject(s) - optics , optical fiber , mode volume , modal , materials science , filter (signal processing) , insertion loss , mode (computer interface) , holography , fiber , measure (data warehouse) , graded index fiber , physics , fiber optic sensor , computer science , polymer chemistry , composite material , computer vision , operating system , database
We present a novel approach to directly measure the bend loss of individual modes in few-mode fibers based on the correlation filter technique. This technique benefits from a computer-generated hologram performing a modal decomposition, yielding the optical power of all propagating modes in the bent fiber. Results are compared with rigorous loss simulations and with common loss formulas for step-index fibers revealing high measurement fidelity. To the best of our knowledge, we demonstrate for the first time an experimental loss discrimination between index-degenerated modes.