Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-07-05
2005-07-05
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Plural
C385S027000, C385S039000, C359S341320
Reexamination Certificate
active
06915037
ABSTRACT:
In this invention we present a method and apparatus of simultaneously compensating a divider power-loss and managing the pump's power budget in upgradeable and scalable passive optical network architecture. The apparatus namely called lossless splitter, is passive, bi-directional and allows modular and scalable PON architecture. According to the preferred embodiment of the present invention a mean of dividing (combining) optical signals to (from) a plurality of paths in a lossless fashion is proposed. This divider (combiner) also as the property of distributing the residual optical pump power, needed for amplifier stage activation, to other dividers (combiners) in a chain. The incoming pump power may be provided by the signal transmission fiber or by a pump power transmission fiber. Applications of this lossless divider (combiner) are reviewed, alternative embodiments are proposed and system deployment/upgrade strategies are described.
REFERENCES:
patent: 5321707 (1994-06-01), Huber
patent: 5323474 (1994-06-01), Hornung et al.
patent: 5608571 (1997-03-01), Epworth et al.
patent: 6532106 (2003-03-01), Chung et al.
Bellemare Antoine
Fathallah Habib
Accessphotonic Networks, Inc.
Baker & Hostetler LLP
Font Frank G.
Mooney Michael P.
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