Optical branching/synthesizing device
US9197950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2012 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Dec 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0015
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical branching/synthesizing device 20A includes an optical branching coupler group 25A and an optical combiner 26. The optical branching coupler group 25A includes a first-stage optical branching coupler 22 that receives a downstream optical signal Sd from an OLT device 12 at light input/output end 22a, and second-stage optical branching couplers 23 and 24 including light input/output ends 23b and 24a connected to light input/output ends 22c and 22d of the optical branching coupler 22 at the previous stage, respectively. A light input/output ends 23a, 23b, 24a, 24b of the optical branching couplers 23 and 24 transmit the downstream optical signal Sd to each ONU device 13 and receive upstream optical signals Su from the ONU devices 13. The optical combiner combines the upstream optical signals Su output from the light input/output ends 22b, 23a, and 24b of the optical branching couplers 22 to 24.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.