Patent ID: 6859471

Claim:
A method of stabilizing an optical power output of an SLD device with respect to ambient temperature, the SLD device including (i) a thermoelectric cooling module (TEC) for cooling an SLD chip, and (ii) a temperature sensor for providing a set point signal corresponding to a set point temperature, wherein the TEC and the temperature sensor, together with a temperature control electronics, from a temperature control feedback loop for maintaining the set point temperature within a predetermined temperature range, comprising: determining an incremental change of the optical power output as a function of ambient temperature, wherein the optical power output of the SLD device is proportional to ambient temperature; determining a variation of the set point signal as a function of ambient temperature, wherein the variation of the set point signal corresponds to the variation of the optical power output; and modifying the temperature control feedback loop so as to include the determined incremental change of the optical power output as a function of ambient temperature thereby stabilizing the variation of the optical power output as a function of ambient temperature.