Methods and apparatus for optical path length equalization in an optical cavity
US11307395B2 · kind B2 · utility
3Cited by
56References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2020 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | May 22, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Method and apparatus to maintain a resonant condition of an optical cavity such that the optical path length through the optical cavity is independent or minimally dependent on the angle of incidence of a received optical signal are disclosed. A material within the optical cavity has an index of refraction that varies as a function of an angle of propagation of light within the material, thereby achieving the independence of the optical path length and the angle of incidence. The resonant condition is maintained over a range of angles of incidence of the received optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.