Lidar system with radiative waveguide array or radiative waveguide surface and feed waveguide

A lidar system for sensing surroundings, in which

• a waveguide array consisting of a plurality of radiating, identical and parallel waveguides with a respective plurality of coupling points or a radiative waveguide surface having multiple, in particular strip-shaped, coupling structures is provided for transmitting and/or receiving light beams, wherein the coupling points or coupling structures serving for radiative emission lie in an approximately equidistant grid,
• by changing the frequency of the wave and/or the effective refractive index in the radiative waveguides or in the radiative waveguide surface, the beam direction is swept in a first spatial direction,
• the array of radiative waveguides or the radiative waveguide surface is fed from a feed waveguide having a plurality of coupling points,
• by changing the frequency of the wave and/or the effective refractive index in this feed waveguide, the beam direction is swept in a second spatial direction, which is preferably-perpendicular to the first spatial direction,
• wherein one of the two spatial directions is horizontal and the other is then vertical, and
• the waveguide array of the radiative waveguides or the radiative waveguide surface and the feed waveguide are realized on a photonic chip.