Transmitter optical subassembly, optical component, optical module, and passive optical network system
US11218221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Feb 19, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2746
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitter optical subassembly is disclosed including a substrate and a direct modulated laser disposed on the substrate. A single-stage isolator, a polarization direction rotator, and an optical branching filter are disposed side by side on the substrate in a light propagation direction. The polarization direction rotator can adjust linearly polarized light to P-polarized light, the optical branching filter includes an optical splitter subassembly and a filter subassembly, and an optical splitter film in the optical splitter subassembly is an optical splitter film with P polarization. The polarization direction rotator adjusts the incident linearly polarized light to the P-polarized light, and the optical splitter film in the optical branching filter is the optical splitter film with P polarization; all P-polarized light with single polarization can pass through the optical branching filter, without causing any polarization loss or two peaks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.