Optical frequency comb based parallel fm lidar
In a LIDAR device (100) a laser light source (110) generates first laser light having a first laser frequency which is frequency modulated with a first frequency modulation. A non-linear optical element (120) receives the first laser light and generates therefrom second laser light having a comb-like frequency spectrum with a plurality of second laser frequencies which are each frequency modulated with a second frequency modulation defined by the first frequency modulation. A frequency excursion of the second frequency modulation is smaller than a spacing of the second laser frequencies. A diffractive element (140) spatially separates the second laser light according to the second laser frequencies and directs the spatially separated second laser light towards a ranging region (200), with each of the second laser frequencies being directed towards a corresponding spatially distinct target position in the ranging region (200). A detector (150) receives reflections of the second laser light from the ranging region (200) and measures, by simultaneously detecting a frequency modulation of the reflections for each of the second laser frequencies, a distance and/or a velocity at the target position corresponding to the second laser frequency.
68696412
Alternative title(s) : (fr) Lidar fm parallèle basé sur un peigne de fréquences optiques
TTO:6.2053
Patent number | Country code | Kind code | Date issued |
US2022413354 | US | A1 | 2022-12-29 |
EP4062192 | EP | A1 | 2022-09-28 |
WO2021098975 | WO | A1 | 2021-05-27 |