Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2008-01-22
2008-01-22
Pak, Sung (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C385S126000
Reexamination Certificate
active
11522315
ABSTRACT:
Optical fibers to form an optical transmission line suitable for WDM transmission in a wide-spreading wavelength band, having the following characteristics and parameters: a dispersion in absolute value of 0.5 ps
m/km to 9 ps
m/km in a wavelength band of 1430 nm to 1625 nm, a dispersion slope in absolute value of 0.04 ps
m2/km or less at a wavelength of 1550 nm, a mode field diameter of 7 μm or less at a wavelength of 1550 nm and a cable cutoff wavelength of less than 1430 nm; core11surrounded by cladding7, core11being at least two-layered (first layer1at the center and second layer2surrounding the first layer; relative refractive index of glass layer Δ1with reference to the cladding being adjusted to not less than 0.6 but not more than 1.6%, relative refractive index of second layer Δ2with reference to the cladding being adjusted to a negative value.
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Pak Sung
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
The Furukawa Electric Co. Ltd.
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