Generating a Laser Linear Frequency Modulation Waveform for Application in Coherent Doppler Lidar

Frequency modulation of a single-frequency laser with a linear triangular waveform is of great interest to many laser remote sensing and interferometry applications. Linear frequency modulation of a continuous-wave (CW) laser beam can make target distance measurements with great precision. If the frequency modulation is perfectly linear with time, such a laser radar (lidar) system will have higher resolution and accuracy compared with pulsed lasers.