| 摘要 |
The invention concerns a wavelength multiplexing optical fibre transmission device comprising multiplexing means with optical combiner (16) consisting of a series of n optical couplers CO1, CO2, CO7 with asymmetric cascade distribution over several stages A, B, C for combining the optical signals received from the optical transmitters (14) of different wavelengths ( lambda 1 to lambda 8). The last coupler CO7 routes the multiplexed optical signals to a main transmission line (18) and a standby transmission line (20). The coupling ratio of the various couplers is adjusted at the channels to compensate spectral gain variation of the optical amplifier (26), which is arranged on the receiver side before the optical demultiplexer (28). The invention is applicable to metropolitan area telecommunication networks.
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