Demultiplexing filter and method
US12321015B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | May 16, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0833
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A demultiplexed filtering method includes propagating an optical beam from an input optical fiber to a diffraction grating to produce a first and a second diffracted beam having a respective first center wavelength λ1 and a second center-wavelength λ2>λ1 of the optical beam. The first diffracted beam propagates back toward the input optical fiber at a first diffracted angle determined in part by λ1 and a diffraction order m1 of the first diffracted beam. The second diffracted beam propagates back toward the input optical fiber at a second diffracted angle determined in part by λ2 and a diffraction order m2<m1. The method also includes (i) coupling the first diffracted beam into a first optical fiber of a one-dimensional optical-fiber array that includes the input optical fiber, and (ii) coupling the second diffracted beam into a second optical fiber of the one-dimensional optical-fiber array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.