title: Optical low-coherence reflectometry for complete chromatic dispersion characterization of few-mode fibers.
abstract: A phase-sensitive optical low-coherence reflectometry (OLCR) technique is demonstrated to simultaneously measure the absolute chromatic dispersion values of each guided LP mode of a few-mode fiber. We show that the OLCR technique requires only short samples of fiber (<1 m) and has no need for high-ratio mode converters to reach an accurate wavelength-dependent group delay evolution of every mode. As an example we present for the first time to our knowledge a direct and complete analysis of few-mode fibers with high, low, positive, and negative modal dispersion values, leading to chromatic dispersion parameters in good agreement with theoretical predictions.
authors.affiliation: GET-Telecom Paris, CNRS UMR, Paris, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Hamel
authors.forename: Yves
authors.initials: Y
authors.lastname: Jaouën
authors.forename: Renaud
authors.initials: R
authors.lastname: Gabet
authors.forename: Siddharth
authors.initials: S
authors.lastname: Ramachandran