Abstract
Dispersion-shifted single-mode fibers operating in the 1550-nm window have been available commercially since 1985.1 With the advances in high-speed optical-communication technology and, in particular, with the introduction of high-power erbium-doped fiber amplifiers (EDFAs), fiber systems have evolved very rapidly. For terrestrial systems, bit rates as high as 10–40 Gbit/s and unrepeatered system lengths as long as a few hundred kilometers have been contemplated. Under such conditions, in addition to chromatic dispersion, polarization mode dispersion (PMD) is a consideration. These systems operate with high-power EDFAs to compensate for the fiber loss. In addition, multiwavelength systems with only 1-or 2-nm channel spacings are being considered for increasing the fiber capacity and making use of the wide spectral range in the 1550-nm window. A combination of these factors makes the nonlinear effects in these systems very critical.2 Single-mode fibers need to be tuned to optimize their performance in such systems. Also, the dispersion-zero and slope requirements for terrestrial and submarine systems can be different. Because of the rapid changes in technology, such designs need to be flexible in their optical characteristics in order to meet future dispersion requirements of both high-bit-rate and WDM systems. In this paper we present theoretical-model and experimental results on a dispersion-shifted single-mode fiber optimized to take into account many of these factors.
© 1995 Optical Society of America
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