Multi-spectral optical coupler with low receive losses
US10656332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2017 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Jul 31, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coupling device for producing an optical coupling between an optical fiber and photonic circuits. The device includes a substrate and at least two coupling stages integrated on the substrate, and: each coupling stage includes a grating coupler configured to implement an optical coupling centered on a respective central wavelength; the multiple grating couplers are superimposed on top of each other, along an axis orthogonal to the substrate plane; at least one of the grating couplers is insensitive to polarization. The device can form, for example, a wide band coupler, wherein each portion of the spectrum is coupled by a coupling stage. As an alternative, such a device can form an emitting and receiving coupler, where emission and reception spectra are each coupled by a respective coupling stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.