Patent ID: 7433377

Claim:
An apparatus comprising: a light producing component to generate laser light; a laser driver coupled to the light producing component adapted to generate a drive pulse to drive the light producing component to generate said laser light; and a laser driver control unit coupled to the laser driver adapted to control said driving of light producing component by said laser driver by controlling a carrier concentration of the light producing component to achieve a desired concentration as a photon level of the light producing component initially arrives at a desired photon level, wherein the laser driver control unit is adapted to control the laser driver to generate the drive pulse as a complex waveform, wherein the complex waveform drive pulse comprises a first portion where the drive pulse rises from an initial level to a final peak level during a first time period, the final peak level being sustained for a predetermined duration during at least a second portion of the drive pulse corresponding to a second time period following the first time period, the first portion includes a first and a second rising transitions having a first and a second rising transition rates, respectively, the second rising transition rate being slower than the first rising transition rate, the first rising transition occurring at a beginning of the first time period and the second rising transition occurring during rest of the first time period following the beginning of the first time period, the first rising transition accounting for ⅓ of the rise from the initial level to the final peak level and the second rising transition accounting for ⅔ of the rise from the initial level to the final peak level.