Title :
Effect of amplifier spacing on four-wave mixing in multichannel coherent communications
Author_Institution :
Telecom Australia Res. Labs., Clayton, Vic., Australia
Abstract :
The buildup of four-wave mixing (FWM) is studied for the case of a multichannel coherent system using cascaded optical fibre amplifiers. It is shown, both analytically and numerically, that FW interactions can be either reduced or resonantly enhanced depending on the choice of the amplifier spacing. An example is given of a three channel phase modulated system with a channel separation of 12.5 GHz transmitted over 1000 km. For this example, resonance of FWM occurred at an amplifier spacing of 53 km.
Keywords :
fibre lasers; multiwave mixing; optical communication; optical fibres; 1000 km; 53 km; amplifier spacing effect; cascaded optical fibre amplifiers; channel separation; four-wave mixing; multichannel coherent communications; three channel phase modulated system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911122
