| 摘要 |
A method and a system for distributing optical carrier signals involve generating (130) multiple optical carrier signals at unique carrier wavelengths, splitting (132) the carrier signals a first time, amplifying (134) the split carrier signals, splitting (136) the carrier signals a second time, modulating (138) data onto the twice-split carrier signals, and then multiplexing (140) modulated carrier signals of different wavelengths together for transmission over common optical paths. In one embodiment, the multiple optical carrier signals are split and amplified separately by unique carrier wavelength before being multiplexed. In other embodiments, the multiple optical carrier signals are multiplexed together for the first signal splitting and for the carrier signal amplification. The multiplexed signals are then demultiplexed so that the optical carrier signals can be individually modulated. The modulated optical carrier signals are then multiplexed with carrier signals of different carrier wavelengths for transmission throughout a subscriber area. By amplifying optical carrier signals during signal distribution, a low number of optical sources are required to distributed multiple optical carrier signals over a wide subscriber area. <IMAGE> |
