| 摘要 |
An optical fibre network (400) comprises a hub (410), an optical router (412), and a plurality of optical network units (ONUs) (414, 416, 418). 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 (420) and divides the channels so bi-directional input/output fibres (434, 436, 438) 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 (434, 436, 438), combines them, and outputs them to a uni-directional output fibre (422). 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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