Techniques for providing combined signal to multi-mode waveguide photodetector
AssigneeAeva, Inc.
InventorsBehsan Behzadi, Omer P. Kocaoglu, Keith Gagne, Oguzhan Avci, Neal N. Oza, Mina Rezk
Life of this patent
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Abstract
A light detection and ranging (LIDAR) apparatus including free space optics to combine a target signal and a local oscillator signal to generate a combined signal. The LIDAR system also includes a set of multi-mode (MM) waveguides and a demultiplexer including a dispersive element. The demultiplexer configured to disperse, via the dispersive element, each respective wavelength of the combined signal at a corresponding angle, and reflect each respective wavelength of the combined signal to a corresponding MM waveguide of the set of MM waveguides.
Claims20
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.
A method, comprising:
- conveying, via optical circuits, an optical signal between optical drivers and receivers and a target through a lens associated with the optical circuits;
- emitting, via an optical source associated with coherent detection, an optical beam at different wavelengths over a range;
- conveying, via an optical waveguide, the optical beam from the optical source to the optical drivers and receivers for transmission via the optical circuits towards the target;
- and
- scanning, via an optical scanner, 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.
Dependencies are inferred from the claim text.