Patent ID: 7505496

Claim:
A system for real-time compensation for non-linearity in an optical source for analog signal transmission, comprising: a laser device comprising a front facet and a back facet, wherein the laser device is operable for receiving an analog modulated input current and generating an analog optical output signal comprising a direct analog modulation technique of an analog signal transmission; a photo-detector device disposed adjacent to the back facet of the laser device, wherein the photo-detector device is operable for measuring the optical output power of the laser device, and wherein the bandwidth of the photo-detector device substantially corresponds to all of the bandwidth of the analog optical output signal with the direct analog modulation technique of the analog signal transmission; and a feedback correction loop coupled to the photo-detector device, wherein the feedback correction loop is operable for generating a substantially linear feedback current responsive only to the optical output power measured for all of the bandwidth of the analog optical output signal; wherein an input analog current is modified in real-time by the substantially linear feedback current to form the analog modulated input current such that the analog optical output signal closely matches the input current without significant distortion in the analog signal transmission.