Dispersion compensating optical fiber

摘要

The present invention is related to an dispersion compensating optical fiber technology, comprising a central core(21a), a middle part(21b) with a refractive index lower than this central core(21a), and a cladding(22) with a refractive index higher than said middle par(21b)t and lower than said central core(21a), characterized in an outer diameter of said middle part(b) being 2.5 &tilde& 3.5 times an outer diameter of said central core(a); a relative refractive index difference of said cladding to said middle part( DELTA -) being -0.08 &tilde& -0.2% with the refractive index of the cladding being zero; and having substantially single-mode transmission in the wavelength 1.55 mu m band, the chromatic dispersion being -80 ps/nm/km or less, the dispersion slope being +0.08 ps/nm<2>/km or less. and the bending loss being 1.0 dB/m or less. <IMAGE>