Broadband dispersion-free optical filter cavities based on dielectric mirrors with complementary dispersion
US8976447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2011 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Dec 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0078
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A substantially dispersion-free optical filter cavity includes a first multilayer mirror and a second multilayer mirror, wherein each mirror includes layers of a less-refractive material and layers of a more-refractive material, the more-refractive material having a higher index of refraction than the less-refractive material. The mirrors are separated by a spacing, and the thickness of a plurality of the layers in the second multilayer mirror differ from corresponding layers in the first multilayer mirror to provide the cavity with complementary group-delay dispersion across the cavity with a phase difference within, e.g., ±0.015 rad across a range of wavelengths spanning at least, e.g., 50 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.