Waveguide filtering biochemical sensor
US11125939B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2021 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Apr 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6471
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A waveguide filter sensing unit is provided. The waveguide sensing unit includes an input waveguide for receiving an optical signal and an interference waveguide region for filtering the optical signal to remove noise therein. The waveguide sensing unit further includes a cladding layer wrapping around the input waveguide and the interference waveguide region; and an optical signal detector converting the filtered optical signal into an electrical signal. The width of the input waveguide is smaller than that of the interference waveguide region, and the refractive index of the cladding layer is smaller than that of the input waveguide and the interference waveguide region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.