System and method for increasing coherence length in lidar systems
US11275158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2018 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Jan 10, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1307
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.