Abstract
Over the last half decade, two conflicting activities have caused chromatic dispersion to be of interest in high-speed long-haul lightwave systems. These activities have been the worldwide deployment of national fiber infrastructures and the development of erbium-doped fiber amplifiers (EDFA’s) for commercial use. More than 40 million kilometers of fiber have been deployed throughout the world, most of which has been so-called “conventional” single-mode fiber which has a zero in the chromatic dispersion at 1.3 μm. This fiber was designed for high-speed systems operating at a wavelength of 1.3 μm using direct modulation of the transmitter laser. Even as the fiber networks were being constructed, work on EDFA’s progressed to the point that it is now desirable to use them in the field. However, systems containing EDFA’s must operate at a wavelength near 1.54 μm where the recently-deployed conventional fiber has high chromatic dispersion, 17 ps/km-nm.
© 1994 Optical Society of America
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