Multi-order, tunable Fabry-Perot etalon filter with wavelength down-selector
US10955721B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2019 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Dec 8, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In accordance with various embodiments of the disclosed subject matter, a system, device and method for an electrically tunable wavelength selection filter comprising a wavelength selection filter portion having a plurality of alternating thin films of two dielectric materials with a thin film capacitor displacing one pair of alternating thin films, and an order sorting filter portion electrically isolated from but proximate the wavelength selection filter and having a plurality of alternating thin films of two dielectric materials where one of the dielectric materials exhibits a voltage-dependent refractive index. Independently controlling the capacitor charging voltage and the voltage across the order sorting filter enables selective transmission of narrow spectral lines across a desired frequency region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.