Method and apparatus for recovering AM channell signals distributed on an optical fiber

摘要

Individual AM channel signals are recovered in the optical domain from a band of signals distributed on an optical fiber. A semiconductor optical amplifier is coupled to receive the band of optical channel signals. The band is defined by a lowest channel frequency fL and a highest channel frequency fH wherein fH<2fL. A local oscillator modulates the gain of the amplifier with a frequency that translates a selected channel signal to another frequency outside of the band for subsequent processing in the electrical domain.