title: Mode resolved bend loss in few-mode optical fibers.
abstract: 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.
authors.affiliation: Institute of Applied Optics, Abbe Center of Photonics, Friedrich Schiller University Jena, Fröbelstieg 1, D-07743 Jena, Germany. christian.schulze@uni-jena.de
authors.forename: Christian
authors.initials: C
authors.lastname: Schulze
authors.forename: Adrian
authors.initials: A
authors.lastname: Lorenz
authors.forename: Daniel
authors.initials: D
authors.lastname: Flamm
authors.forename: Alexander
authors.initials: A
authors.lastname: Hartung
authors.forename: Siegmund
authors.initials: S
authors.lastname: Schröter
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bartelt
authors.forename: Michael
authors.initials: M
authors.lastname: Duparré
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods*