FMCW LIDAR using array waveguide receivers and optical frequency shifting
US11372105B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2021 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Oct 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4817
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system including one or more waveguides to receive a first returned reflection having a first lag angle and generate a first waveguide signal, receive a second returned reflection having a second lag angle different from the first lag angle, and generate a second waveguide signal. The system includes one or more photodetectors to generate a first output signal within a first frequency range, and generate, based on the second waveguide signal and a second LO signal, a second output signal within a second frequency range. The system includes an optical frequency shifter (OFS) to shift a frequency of the second LO signal to cause the second output signal to shift from within the second frequency range to within the first frequency range to generate a shifted signal. The system includes a processor to receive the shifted signal to produce one or more points in a point set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.