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Transmission properties of long fiber links

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Abstract

The two main fiber transmission properties of interest to the optical system designer are attenuation and dispersion. Present fiber and cable suppliers specify these quantities normalized to 1-km lengths, for example, attenuation in dB/km and pulse broadening in nsec/km or bandwidth in MHz/km. A difficulty arises in that concatenated links usually do not behave linearly or additively with length, and the effects of joints are not always understood. The result has been that many systems to date perform better than the sum of individual component specifications would suggest. Such a situation is not desirable to the design engineer making cost/performance trade offs seeking to minimize system margins.

© 1981 Optical Society of America

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