Title :
Multimode fibre baseband frequency response measurement with single frequency output extracted from modulated InGaAsP laser
Author :
Machida, Shimon ; Imoto, Nobuyuki ; Ohmori, Yutaka
Author_Institution :
NTT, Musashino Electrical Communication Laboratory, Musashino, Japan
Abstract :
A new method to measure multimode fibre frequency response is presented by using a single longitudinal mode extracted from modulated semiconductor laser output. Intensity fluctuation noise, caused by r.f. modulation, is utilised as a broadband baseband signal. Baseband frequency response of a 1.98 km graded-index fibre is measured up to 1.5 GHz in 1.1¿1.5 ¿m wavelength region. This method provides a simple and accurate measurement of intermodal dispersion excluding chromatic dispersion effect.
Keywords :
frequency response; measurement by laser beam; optical dispersion; optical fibres; optical variables measurement; 1.1 to 1.5 microns; InGaAsP laser; RF modulation; baseband frequency response; intensity fluctuation noise; intermodal dispersion; longitudinal mode; modulated laser beam; multimode optical fibres;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19790436
