| 摘要 |
An optical network is disclosed which includes an optical fibre shared by a plurality of transmitters using code division multiple access techniques. The transmitters are connected by tributary optical fibres to the shared optical fibre. In code division multiple access techniques, each communication is encoded with a distinctive code which enables a receiver to extract the communication intended for it from amongst communications intended for other receivers. It is found that synchronising the communications on the optical fibre improves the ability of a receiver to extract the communication intended for it. Injecting an optical pulse signal into the optical network, and using the tributary optical fibres to carry the clock signal to the transmitters provides an inexpensive method of synchronising the transmitters which feed signals onto the optical fibre. The technology is of use in optical networks, and other transmission line networks, and is well-suited to use in local area networks. |
