Optical frequency measurement device
US11460347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2020 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Nov 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2009/0257
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical locker may include an assembly. The assembly may include a beam splitter, configured to split an input beam into at least three beams; an etalon having at least three regions, positioned so that each beam passes through a different region; a detector configured to measure output intensities, Tn, of the etalon for the beam; and a controller configured to determine a ratio, Ta/Tb, of the output intensities, wherein that ratio has a slope at the output intensities which is above a threshold, obtain a target frequency of the input beam, and determine an actual frequency of the input beam based on the target frequency and the ratio of the output intensities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.