| 摘要 |
An optical fibre network comprises a hub, an optical router, and a plurality of optical network units (ONUs). In the downstream direction from the hub to the ONUs, the optical router receives channels having predefined wavelength ranges from a uni-directional input fibre and divides the channels so bi-directional input/output fibres receive at least one of the plurality of channels. In the upstream direction from the ONUs to the hub, the optical router receives the channels from the bi-directional input/output fibres, combines them, and outputs them to a uni-directional output fibre. For any particular channel, in the downstream direction it is routed to a first bi-directional input/output fibre and in the upstream it is routed from a second bi-directional input/output fibre different from the first bi-directional input/output fibre.
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