Abstract: A tunable channel transmitter system for a wavelength division multiplexed (WDM) passive optical network (PON) includes a WDM communication system having a plurality of WDM channel bandwidths, an injection-locked Fabry-Perot laser having a plurality of resonant modes, a seed light source to provide seed light to the injection-locked Fabry-Perot laser, and a temperature control element configured to shift the plurality of resonant modes of the injection-locked Fabry-Perot laser to ensure that only one resonant mode of the injection-locked Fabry-Perot laser is locked to the seed source and transmitting a substantial portion of the laser power through a desired channel of the WDM communications system.

Abstract: The present invention is a communication system for communicatinginformation over greater distances than otherwise possible on bidirectional media subject tointerference, by reducing the interference while assuring spectral compatibility with other communication services. The system of the present invention provides symmetric data service to end users by using asymmetric signaling. In one embodiment, the present invention utilizes partially overlapped, non-symmetric baud rates and spectrally shaped transceiver filters to achieve both spectral compatibility and extended range.