Title :
Line codes for photonically amplified digital links
Author :
Waldman, Helio ; Ribeiro, Moisés R N
Author_Institution :
DECOM/FEE, UNICAMP, Campinas, Brazil
Abstract :
In noise-limited optical links with cascaded amplifiers, we show that coding gains can be obtained from sparse codes, but will be limited by dispersion. Dispersion limitations are determined by a complex combination of intersymbol interference and laser nonlinearities, so that determination of the worst-case patterns requires computation of laser dynamics. Rates for line codes that eliminate these patterns are shown to be strongly dependent on which patterns one wishes to eliminate. Under the best codes, performance of the system is limited by a combination of noise and dispersion, and performance evaluation will then demand new computational tools
Keywords :
codes; digital communication; fibre lasers; intersymbol interference; optical fibre communication; optical fibre dispersion; optical links; optical noise; cascaded amplifiers; coding gains; dispersion limitations; intersymbol interference; laser dynamics; laser nonlinearities; line codes; noise-limited optical links; performance evaluation; photonically amplified digital links; sparse codes; worst-case patterns; Fiber nonlinear optics; Laser modes; Laser noise; Optical distortion; Optical mixing; Optical noise; Optical transmitters; Quantum cascade lasers; Repeaters; Stimulated emission;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586773
