Techniques for providing combined signal to multi-mode waveguide photodetector

A light detection and ranging (LIDAR) apparatus, comprising:

• optical drivers and receivers associated with optical circuits configured to convey an optical signal between the optical drivers and receivers and a target through a lens associated with the optical circuits;
• an optical source associated with coherent detection, the optical source being configured to emit an optical beam at different wavelengths over a range;
• an optical waveguide configured to convey the optical beam from the optical source to the optical drivers and receivers for transmission via the optical circuits towards the target;
• and
• an optical scanner configured to scan the target via the lens based on fields of view associated with the target, the optical scanner being associated with a dispersive element which adjusts the fields of view based on the different wavelengths.