Light source backup method, apparatus, and system
US11451301B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2021 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Apr 30, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3598
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This application provides an example light source switching apparatus. The apparatus includes first and second multi-mode interference (MMI) couplers, and a phase modulator. The first MMI coupler includes four ports, where first and second ports are located on one side, and third and fourth ports are located on the other side. The second MMI coupler includes three ports, where fifth and sixth ports are located on one side, and a seventh port is located on the other side. The first and the second ports connect to the fifth and the sixth ports, respectively, to form two connections. The phase modulator is disposed on one of the two connections, and the seventh port connects to an optical modulator. Both the third and the fourth ports connect to a light source emitting continuous light, and the phase modulator selects one of the two light sources for output from the seventh port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.