Title :
Multi-Gbit/s long span transmission systems
Author :
Ito, Takeshi ; Hayashi, Yoshihiro ; Saito, Shigeru ; Aiki, Mamoru
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa-ken, Japan
Abstract :
Various kinds of multi-gigabit-per-second long span transmission systems including repeaterless systems and repeatered systems are evaluated from the viewpoint of initial system cost and transmission distance. A combination of a transmitter with high output power and a coherent detection receiver with high sensitivity is suitable for a repeaterless system. For a repeatered system, an optical amplifier is indispensable to construct a nonregenerative repeater, and coherent modulation/detection is preferable to intensity modulation/direct detection due to its potential for long span transmission. The feasibility of the technologies required in long span transmission systems are demonstrated by a field trial of a prototype coherent repeaterless system at 2.488 Gb/s
Keywords :
optical communication equipment; optical links; repeaters; 2.488 Gbit/s; coherent detection receiver; coherent modulation/detection; high power transmitter; high sensitivity; initial system cost; long span transmission; multi-gigabit-per-second; nonregenerative repeater; optical amplifier; optical links; repeatered systems; repeaterless systems; transmission distance; Costs; Intensity modulation; Optical modulation; Optical receivers; Optical sensors; Optical transmitters; Power amplifiers; Power generation; Repeaters; Stimulated emission;
Conference_Titel :
Communications, 1991. ICC '91, Conference Record. IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-0006-8
DOI :
10.1109/ICC.1991.162549
