H - Electricity – 04 – M
Patent
H - Electricity
04
M
88/97
H04M 1/00 (2006.01) H04Q 11/04 (2006.01) H04H 1/02 (2006.01)
Patent
CA 1268361
Abstract of the Disclosure Fiber-Optic Distribution System for Broadband Signals A fiber-optic distribution system is disclosed which distributes broadband signals received by a network ter- mination circuit from a broadband communications network (B-ISDN or cable-television network) among a plurality of subscriber terminals. The network termination cir- cuit (4) contains devices for separating a forward channel and a backward channel. It also includes electric to-optical and optical-to-electric transducers (5, 6). The distribution system contains a fiber-optic multi- port coupler (10) which is made by the fusion technique and interconnects a plurality of optical fibers (12, 13, 14). On the subscriber's side, each of these optical fibers forms the forward channel and the back- ward channel for one of the terminals (32). On the net- work side, one of these optical fibers (16) forms the forward channel for the broadband signals, and all other optical fibers (17, 18) are combined to form the narrow- band backward channel. They are connected to a common large-area photodiode (6). As the backward channel is a narrow-band channel, the fact that large-area photo- diodes, such as PIN diodes, are relatively slow does not cause any bandwidth problems.
515294
Alcatel N.v.
Smart & Biggar
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