Patent ID: 8867928

Claim:
A linearized optical transmitter unit comprising: a directly-modulated or externally-modulated laser optically coupled to an optical conduit directed to an optical fiber communications link and electrically coupled to an electrical RF source line that provides an RF source to drive the laser or an external modulator for a light beam from the laser; a predistortion information electrical component comprising a digital processor, transmitter memory and a data output configured to transmit predistortion enabling data from the predistortion information electrical component through an electronic communication channel for input into a direct digital synthesis engine comprising a processor and a digital-to-analog converter, with the direct digital synthesis engine digitally processing the predistortion enabling data to digitally generate an RF signal to pre-compensate nonlinear responses of the transmitter and/or the optical fiber communications link with the predistortion enabling data based at least in part on predetermined pre-distortion parameters specific for the optical transmitter and/or the optical fiber communications link, said pre-distortion parameters being stored in the transmitter memory for communication to the direct digital synthesis engine.