Communications network with optical channels
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United States of America Patent
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-
Jul 16, 1985
Grant Date -
N/A
app pub date -
Sep 27, 1982
filing date -
Oct 8, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communications network with optical channels is provided. Using the heterodyne principle, optical channels for narrow and wideband services can be provided in very large numbers to the subscriber stations connected to the communications network using a monomode fiber as the transmission medium. The switching of these channels can also be effected using the heterodyne principle with optional access without a connecting path network in the conventional sense, all the receiver equipments being connected with all the transmitter equipments via a common light frequency channel multiplex. The tuning to a channel from which reception is required is carried out using a tunable local laser. The intermediate frequency occurs in the microwave range. The intermediate frequency filter is fixed tuned.
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