| 摘要 |
An optical data network including an optical communications medium, adapted to convey optical signals of multiple different wavelengths; a plurality of optical data transceivers, which are adapted to transmit and receive the optical signals over the medium and at least one optical coupler. The optical coupler is coupled to the medium between the transceivers, and is adapted to filter the wavelengths conveyed over the medium so as to convey the optical signals in a first subset of the wavelengths only to a first group of the transceivers, and to convey the optical signals in a second subset of the wavelengths only to a second group of the transceivers, which is different from the first group.
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