Title :
Improved chromatic dispersion tolerance for optical duobinary transmission using coherent detection
Author :
Goldfarb, Gilad ; Kim, Cheolhwan ; Li, Guifang
Author_Institution :
Coll. of Opt. & Photonics, Univ. of Central Florida, Orlando, FL
Abstract :
The impact of chromatic dispersion on the complex electric field of an optical phase-coded duobinary signal is investigated through numerical simulation. Dispersion causes distortion and rotation of the optical constellation with increasing transmission distance, leading to eye closure of the received signal. When direct detection is employed, rapid eye closure starts after approximately 213 km. Employing coherent detection increases this dispersion limit by 70 km
Keywords :
optical fibre communication; optical fibre dispersion; optical modulation; phase coding; chromatic dispersion tolerance; coherent detection; optical duobinary transmission; optical phase-coding; rapid eye closure; Chromatic dispersion; Constellation diagram; Numerical simulation; Optical distortion; Optical fiber dispersion; Optical filters; Optical modulation; Optical receivers; Optical sensors; Optical transmitters; Chromatic dispersion; constellation diagram; optical duobinary; optical fiber communication;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.863640
