Dynamically optimized tunable filters for optical sensing systems
US10802221B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2019 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Oct 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0204
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The optical receiver portion of an optical sensing system (such as, for example, a LIDAR system) includes a tunable narrowband optical filter that is used in combination with a feedback element to continuously monitor the received (reflected) optical signal and adjust the center wavelength of the narrowband optical filter to follow recognized shifts in the source wavelength. These slight adjustments to the center wavelength of the optical filter (as controlled by the feedback element) ensure that the passband of the optical filter tracks any shift/drift in the source wavelength, without requiring any direct connection/wavelength monitoring between the source and the receiver, and also without the need to utilize complex wavelength stability configurations at the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.