Title :
Optimum optical modulation index of laser transmitters in SCM systems
Author :
Alameh, Kamal ; Minasian, Robert A.
Author_Institution :
Sch. of Electr. Eng., Sydney Univ., NSW, Australia
Abstract :
An analysis of the optimum optical modulation index of laser transmitters in SCM systems is presented. Nonlinear distortion arising from overmodulation in a laser-limiter combination is studied. A generalised analysis, based on rectangular signal input power spectral density and broadband transmission, is given for the nonlinear noise spectral density. A computer algorithm is developed to generate the optimum modulation index which maximises the received CNR for SCM transmission.
Keywords :
multiplexing; optical communication; optical fibres; SCM systems; SCM transmission; broadband transmission; carrier noise ratio; computer algorithm; generalised analysis; laser transmitters; laser-limiter combination; nonlinear noise spectral density; optimum optical modulation index; overmodulation; passive optical network; received CNR maximisation; rectangular signal input power spectral density; subcarrier multiplexing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900820
