Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2004-07-13
2008-11-18
Wong, Tina M (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000, C385S124000
Reexamination Certificate
active
07454109
ABSTRACT:
Disclosed is an optical fiber suitable for WDM system, particularly whose zero-dispersion wavelength is positioned in a short wavelength band less than 1,300 mm. In the optical fiber, dispersion has a positive value, not zero, at 1,310 nm, and a dispersion slope is positive at 1,550 nm with dispersion of 25 ps
m-km or less. In addition, an effective sectional area is 65 μm2or less at 1,310 nm, and 80 μm2or less at 1,550 nm.Thus, though a transmission signal is Raman-amplified at a wavelength band of 1,300˜1,700 nm, transmission characteristics are not deteriorated due to crosstalk between pump signals. In addition, since the optical fiber has smaller effective sectional area than a general single-mode optical fiber with having substantially the same dispersion feature, it gives better Raman gain efficiency than a general single-mode optical fiber.
REFERENCES:
patent: 7099543 (2006-08-01), Bickham
patent: 2002/0102082 (2002-08-01), Sarchi et al.
patent: 2005/0013571 (2005-01-01), Wood
patent: 2005/0244120 (2005-11-01), Mishra
patent: 2002-318315 (2002-10-01), None
patent: 2001-0060739 (2001-07-01), None
Mun Jun-Ho
Park Hye-Young
Jones Day
LS Cable Ltd.
Wong Tina M
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