title: Optical frequency-domain chromatic dispersion measurement method for higher-order modes in an optical fiber.
abstract: We propose a new chromatic dispersion measurement method for the higher-order modes of an optical fiber using optical frequency modulated continuous-wave (FMCW) interferometry. An optical fiber which supports few excited modes was prepared for our experiments. Three different guiding modes of the fiber were identified by using far-field spatial beam profile measurements and confirmed with numerical mode analysis. By using the principle of a conventional FMWC interferometry with a tunable external cavity laser, we have demonstrated that the chromatic dispersion of a few-mode optical fiber can be obtained directly and quantitatively as well as qualitatively. We have also compared our measurement results with those of conventional modulation phase-shift method.
authors.forename: Tae-Jung
authors.initials: TJ
authors.lastname: Ahn
authors.forename: Yongmin
authors.initials: Y
authors.lastname: Jung
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh
authors.forename: Dug Young
authors.initials: DY
authors.lastname: Kim