Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2007-01-16
2007-01-16
Song, Sarah (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
Reexamination Certificate
active
11073725
ABSTRACT:
A dispersion-compensating fiber having a figure of merit of at least 200 ps
m/dB and an absolute value of relative dispersion curvature of at most 10−4nm−2both at a wavelength of 1550 nm, a dispersion compensator, and an optical transmission line are provided for large-capacity optical transmission. The dispersion-compensating fiber has a first core region with a refractive index of n1, a second core region surrounding the first core region with a n2(n1>n2), a third core region surrounding the second core region with a n3(n2<n3), and a 50 cladding region surrounding the third core region with a n4(n3>n4). With reference to n4,the first core region has a relative refractive-index difference of 2.0% to 3.3%, the second core region of −1.5% to −0.2%, and the third core region of 0.2% to 0.5%.
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McDermott Will & Emery LLP
Song Sarah
Sumitomo Electric Industries Ltd.
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