Abstract

Optical amplifiers can efficiently be used to increase the transmission span in high-speed, long distance repeaterless communication systems [1], which are of interest, e.g., in undersea and offshore links, island jumping and trunk lines between main exchanges. For these applications, very high transmitter output power and receiver sensitivity is desirable. Both may be achieved using optical amplifiers in direct detection systems. It is also of great importance to have a transmitter with a small spectral width in order to minimize dispersion effects, if non-dispersion shifted fibre is used. This could be the case when upgrading already installed systems.

© 1992 Optical Society of America

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