Synchronous multifrequency optical network
First Claim
1. A multi wavelength optical network comprising a plurality of nodes interconnected via a single common passive optical coupler wherein all signals transmitted over the network are synchronous at the coupler, each node receiving signals from all the nodes and each node including wavelength demultiplexing means.
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Abstract
A multi wavelength optical network including a plurality of wavelength multiplexed nodes each having a single frequency optical signal transmitting means (13) and a multi wavelength optical signal receiving means (15), an optical transmission network including a passive optical coupling means (12) interconnecting said nodes whereby single frequency signals transmitted from each node are propagated via the coupling means to all the nodes, each node also including wavelength demultiplexing means (14) through which received signals are applied to the multi wavelength receiving means and timing and control means (17, 18, 19) arranged to control the timing of signals transmitted by the node over the network so that the signals from all the nodes are synchronous at the coupler.
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Citations
9 Claims
- 1. A multi wavelength optical network comprising a plurality of nodes interconnected via a single common passive optical coupler wherein all signals transmitted over the network are synchronous at the coupler, each node receiving signals from all the nodes and each node including wavelength demultiplexing means.
- 2. A multi wavelength optical network including a plurality of wavelength multiplexed nodes each having a single wavelength optical signal transmitting means and a multi wavelength optical signal receiving means, an optical transmission network including a passive optical coupling means interconnecting said nodes whereby single wavelength signals transmitted from each node are propagated via the coupling means to all the nodes, each node also including wavelength demultiplexing means through which received signals are applied to the multi wavelength receiving means and timing and control means arranged to control the timing of signals transmitted by the node over the network so that the signals from all the nodes are synchronous at the coupler.
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9. A node for a synchronous multifrequency optical network including a single wavelength optical signal transmitting means and a multi wavelength optical signal receiving means, said receiving means including optical wavelength demultiplexing means, means for extracting clock and timing control signals from demultiplexed received signals to derive control signals to control transmission of signals from the node and means for synchronously regenerating received demultiplexed signals.
Specification