Patent ID: 7529484

Claim:
An optical triplexer transceiver, comprising: a laser adapted to be driven by electrical upstream data signals from a user; an optical filter comprising a plurality of ports, a first port of the optical filter coupled to the laser for receiving upstream optical data signals, a second port of the optical filter for passing the upstream optical data signals to a network, and for receiving combined downstream optical data signals and video signals from the network, and a third port of the optical filter for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for receiving the combined downstream optical data and video signals and converting the downstream optical data and video signals to electrical signals; and a plurality of filters coupled to the photodetector for separating the downstream data and video signals, said filters comprising a low pass filter for passing the downstream data signals and a band-pass filter for passing the video signals, a coherent detector coupled to the band-pass filter for coherently detecting the SCM video signals in two-stages of coherent detection, where each stage corresponds to a stage of SCM whereby, the separated downstream data and video signals may be communicated to the user; wherein video signals received by the optical filter comprise a plurality of channels multiplexed by subcarrier modulation (SCM); and wherein the plurality of video signals are subjected to two stages of SCM.