Upgrade Strategies for Long- Distance Lightwave Networks

摘要

Optical amplifiers and wavelength-multiplexing technology are transforming lightwave communications by providing cost-effective upgrades that will increase immensely the transmission capacity of long-distance telecommunications networks. A new generation of undersea-cable systems using fiber optical amplifiers as repeaters has been developed for transoceanic applications, yielding a capacity almost ten times larger than present systems which employ optoelectronic regenerative repeaters. Wavelength-multiplexed multichannel transmission and networking promise further enhancements. Terrestrial long-haul networks will benefit significantly form amplified wavelength-multiplexed transmission systems designed to access the large inherent bandwidth in the installed fiber.