Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2005-02-15
2005-02-15
Lee, Diane I. (Department: 2876)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000
Reexamination Certificate
active
06856743
ABSTRACT:
An optical waveguide fiber having an effective area of greater than about 60 μm2at a wavelength of about 1550 nm, a dispersion slope of less than 0.07 ps
m2/km at a wavelength of about 1550 nm, and a zero-dispersion wavelength of less than about 1500 nm. In preferred embodiments, the optical fiber has a mode field diameter greater than 9 μm at 1550 nm and includes a first core region with a positive relative refractive index, a first annular core region with a positive relative refractive index, and a second annular core region having a negative refractive index, wherein the the second annular core region begins at a radius greater than the mode field diameter and ends at a radius less than about 2.5 times the mode field diameter. Cabled cutoff wavelengths are less than about 1300 nm.
REFERENCES:
patent: 6301422 (2001-10-01), Li
patent: 6317551 (2001-11-01), Mitchell et al.
patent: 6701053 (2004-03-01), Liu
patent: 20020141719 (2002-10-01), Liu
patent: WO0111402 (2001-02-01), None
Luc B. Jeunhomme; “Single-Mode Fiber Optics Principles and Applications”; Optical Engineering/vol. 23; Second Edition; pp. 39-44.
Caputo Lisa M.
Corning Incorporated
Homa Joseph M.
Lee Diane I.
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