Importance

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Abstract

The present invention relates to an optical fiber transmission line comprising a structure for making it possible to maintain a desirable mean transmission characteristic as a whole regardless of the fluctuation in total length caused upon cutting end portions; and an optical cable including the same. The optical fiber transmission line according to the present invention comprises a main transmission line and first and second end sections connected, respectively, to both ends of the main transmission line. As a typical configuration, the main transmission line is constituted by a single-mode optical fiber and a dispersion-compensating optical fiber. At a wavelength of 1.55 .mu.m, the single-mode optical fiber has a positive chromatic dispersion, and the dispersion-compensating optical fiber has a negative chromatic dispersion. The respective chromatic dispersions and lengths of the single-mode optical fiber and dispersion-compensating optical fiber are set so as to lower the absolute value of mean chromatic dispersion of the main transmission line as a whole, whereas each of the first and second end sections has a chromatic dispersion substantially equal to the mean chromatic dispersion in order to suppress the influence upon the mean of the optical fiber transmission line as a whole caused by the fluctuation in length due to the cutting.

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First Claim