Highly Efficient Algorithm for Frequency Linearization in FMCW Lidar Using Directly-Modulated DFB Laser

A non-iterative pre-distortion algorithm is presented for linear frequency sweep in FMCW LiDAR using directly-modulated semiconductor lasers. This method achieves a residual frequency nonlinearity of ± 0.6 MHz and an accuracy of 18.7 cm for 300 m ranging distance.