Optical waveguides – Optical fiber waveguide with cladding – With graded index core or cladding
Reexamination Certificate
2011-04-12
2011-04-12
Peng, Charlie (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
With graded index core or cladding
C385S122000, C385S126000, C385S127000, C359S341100, C372S006000
Reexamination Certificate
active
07925132
ABSTRACT:
A core includes a center core region, a core layer that is formed around the center core region and that has a refractive index lower than that of the center core region, and at least one buffer core layer that is formed between the center core region and the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. A cladding is formed around the core layer and that has a refractive index lower than that of the center core region and higher than that of the core layer. An effective core area at a wavelength of 1550 nm is equal to or smaller than 18 μm2.
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Hiroishi Jiro
Sugizaki Ryuichi
Takahashi Masanori
Taniguchi Yuki
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Peng Charlie
Tavlykaev Robert
The Furukawa Electric Co. Ltd.
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