Techniques to compensate for phase impairments in LIDAR systems
US11169246B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2021 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Apr 19, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4917
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method to compensate for phase impairments in a light detection and ranging (LIDAR) system includes transmitting a first optical beam towards a target, receiving a second optical beam from the target to produce a received optical beam; and generating a digitally-sampled target signal using a local oscillator (LO) beam, a first photo-detector and the received optical beam. The method also includes generating a digitally-sampled reference signal using a reference beam transmitted through a fiber delay device and a second photo-detector, and estimating one or more phase impairments in the LiDAR system using the digitally-sampled reference signal to produce one or more estimated phase impairments. The method also includes performing a first correction on a first phase impairment introduced into the digitally-sampled target signal by the LO beam; performing a second correction on a second phase impairment introduced into the digitally-sampled target signal by the received optical beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.