Patent ID: 6307993
Filing Date: 2001-10-23
Classification: G02B

Abstract:
An optical fiber for wavelength division multiplexing (WDM) communications, comprising:an inner core having a predetermined refractive index, formed to have a first predetermined radius from a central axis of the optical fiber;an outer core having a refractive index that is lower than the refractive index of the inner core and getting linearly smaller from its inner side to its outer side, formed on an outer side of the inner core to have a second predetermined radius; andan inner cladding formed on the outer side of the outer core to have a third predetermined radius;an outer cladding having a refractive index that becomes linearly smaller from its inner side to its outer side, formed on an outer side of the inner cladding;the optical fiber having a dispersion value in a range of 2.0 to 4.0 ps nm.sup.-1 Km.sup.-1 in a 1550 nm wavelength band.