Optical fiber communications technology has been extensively employed and deployed in global communications
networks and throughout terrestrial systems; from fiber to the home schemes in several countries to internetworking
between countries and major cities [1]. During this last decade of the 20th century and the coming 21st century we have
witnessed and will be certain that an increasing deployment of communication capacity will be demanded by informationhungry
societies. The enormous bandwidth of optical fibers and advancement of 0optical communications technology
together with the direct photon-photon amplification make possible several innovative configurations of optical
transmission systems and distribution networks. Current deployment of optical signals over single mode optical fibers in
the filed are only based on single channels either at 1310 nm or 1550 nm windows [2], except in some field trail systems
and networks. It is essential that the these enormous bandwidth regions should be used extensively. Intense investigation
and experiments of ultra-long and ultra-high speed optical communication systems have been carried out together with
interests in the multiplexing of optical carriers in the same fiber channel, the wavelength division multiplexing techniques
have been used as the unique technology