Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2005-02-22
2005-02-22
Font, Frank G. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S124000
Reexamination Certificate
active
06859599
ABSTRACT:
Optical fibers with high non-linearity and low dispersion suitable for the Raman amplification are offered. Their structural and characteristic specifics are as follows: first core1with α profile surrounded with second core2, further second core surrounded with cladding5; setting first core1for no less than 1.8% of relative refractive index difference from cladding5; setting second core2for no more than −0.4% of relative refractive index difference from cladding5, setting α for 1.5 or larger, making second core2at least 2.2 times as large as first core1in diameter; and an effective area of no more than 15 μm2, a dispersion slope of 0.05 ps
m2/km or lower in absolute value, a dispersion of no less than 5 ps
m/km and no more than 20 ps
m/km, in absolute value, a cutoff wavelength of 1350 nm or shorter, and a bending loss of 5.0 dB or lower in a bending diameter of 20 mm, each at a wavelength of 1.55 μm.
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Font Frank G.
Robinson Eric J.
Robinson Intellectual Property Law Offiice, P.C.
Wong Eric
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