Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2005-04-26
2005-04-26
Assaf, Fayez G. (Department: 2872)
Optical waveguides
Optical fiber waveguide with cladding
C385S124000, C385S127000, C385S132000, C385S024000, C385S028000
Reexamination Certificate
active
06885802
ABSTRACT:
A network for distributing signals to a plurality of user having a distribution unit and a plurality of optical cables adapted to make the distribution unit communicate with the plurality of user equipment. In turn, each optical cable has an optical fibre having a core, a cladding and a predetermined simple refractive index profile Δn(r). Each optical fibre is adapted to guarantee a single-mode propagation at higher wavelengths than about 1260 nm and a few-mode propagation at about 850 nm, and each optical fibre has such refractive index profile Δn(r) as to guarantee macro-bending losses at 1550 nm that are less than about 0.5 dB and an intermodal delay Δτ at 850 nm that is less than or equal to, about 1 ns/Km.
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Oliveti Guidö
Pomarico Francesco Ivan
Roba Giacomo
Sarchi Davide
Sartori Francesco
Assaf Fayez G.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Pirelli S.p.A.
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