Patent ID: 6522821
Filing Date: 2003-02-18
Classification: G02B

Abstract:
A dispersion-compensating optical fiber insured its single mode at a wavelength of 1.55 &mgr;m, said dispersion-compensating optical fiber comprising:a first core extending along a predetermined axis, said core having a refractive index n1 and an outside diameter 2a; a second core provided on the outer periphery of said first core, said second core having a refractive index n2 higher than that of said first core and an outside diameter 2b; and a cladding provided on the outer periphery of said second core, said cladding having a refractive index n3 lower than that of said second core; wherein said dispersion-compensating optical fiber has a chromatic dispersion of (âˆ’10 ps/nm/km or more negative at the wavelength of 1.55 &mgr;m, and the ratio 2a/2b of the outside diameter 2a of said first core with respect to the outside diameter 2b of said second core is 0.05 or more.