Optical fiber and method for making the same
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakemi Hasegawa, Masashi Onishi, Eisuke Sasaoka, Masayuki Nishimura
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Abstract
An optical fiber has a section of the first kind having a chromatic dispersion not less than a given positive value x and a negative chromatic dispersion slope at a given wavelength and a section of the second kind has a chromatic dispersion not more than −x and a positive chromatic dispersion slope at the same wavelength. Another optical fiber has a chromatic dispersion higher than a positive value x and a negative chromatic dispersion slope at a given wavelength band.
Claims8
An optical fiber composed of:
- at least a section of the first kind having chromatic dispersion not less than a given positive value x and negative chromatic dispersion slope at a given wavelength;
- and
- at least a section of the second kind having chromatic dispersion not more than −x and positive chromatic dispersion slope at said given wavelength, wherein said optical fiber is composed of a core and a cladding which surrounds said core and has a mean refractive index lower than that of said core, at least one of said core and cladding includes regions spaced apart in cross section and made of sub mediums whose refractive indices are different from those of main mediums constituting the optical fiber, and at least one of the cross-sectional areas and the refractive indices of the regions made of the sub mediums change along the fiber axis.
An optical fiber, having chromatic dispersion not less than a positive value x and negative chromatic dispersion slope at a given wavelength, composed of a core and a cladding surrounding the core and having a lower mean refractive index than that of said core, wherein at least one of said core and cladding has regions spaced apart in cross section and made of sub mediums whose refractive indices are different from those of main mediums constituting the core and the cladding.
Dependencies are inferred from the claim text.