title: Pulse separating in transmission characteristics of multimode graded index optical fibers.
abstract: The transmission characteristics of multimode graded index optical fibers, whose refractive index profiles were nearly parabolas, were measured. No change of the output pulse waveform could be detected at a 1-km length with a lowest-order mode excitation. In the case of mismatching excitation, output pulse waveforms separated into two pulse peaks. This was caused by the refractive index profile that was not a single function but a combination of two functions.
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
authors.forename: H
authors.initials: H
authors.lastname: Yoshikiyo