US Patent 11187807 Precisely controlled chirped diode laser and coherent lidar system

Frequency modulated lasers, LIDAR systems, and methods of controlling laser are disclosed. A laser source emits an optical beam having an optical frequency that changes in response to a signal applied to an input of the laser source. A laser driver that generates the signal applied to the input to cause the optical frequency to vary in accordance with a periodic frequency versus time function. The laser driver generates the signal for a current period of the periodic frequency versus time function based, at least in part, on optical frequency versus time measurements of one or more prior periods of the periodic frequency versus time function.