| 摘要 |
The present document relates to optical transmission systems. In particular, the present document relates to the reach extenders for passive optical networks (PON). A point to multipoint optical-electrical-optical extender (200) for a passive optical network is described. The extender (200) comprises a point-to-point optical-electrical-optical converter (212, 230) adapted to amplify an optical downlink feeder signal on a feeder optical transmission channel (250) on a downlink from an optical line terminal (101) to a plurality of optical network terminals (102), thereby yielding the amplified optical downlink feeder signal (251); and a multipoint-to-point optical-electrical-optical converter (214, 213, 212) adapted to amplify a plurality of optical uplink drop signals (255) on an uplink from the plurality of optical network terminals (102) to the optical line terminal (101). |
