High-resolution ranging of a diffuse target at sub-millisecond intervals with a calibrated FMCW Lidar

We demonstrate a FMCW Lidar with a frequency-calibrated laser modulated over 1 THz at ~1 kHz modulation frequency. Range to a diffuse target is measured at 0.5 ms intervals with 150 μm resolution and ~1 μm precision. Work of the U.S. government, not subject to copyright.