Optical transmitter and optical communication system
US7801450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2004 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0123
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmitter includes an optical modulator, an optical coupler, a crosspoint monitoring unit, a reference-value setting unit, and a bias circuit. The optical coupler splits an optical signal output from the optical modulator into a plurality of optical signals. The crosspoint monitoring unit receives part of the optical signals, and monitors a crosspoint of the optical signal output from the optical modulator. The reference-value setting unit sets a bias reference value to be assigned to the optical modulator based on an output of the crosspoint monitoring unit so that the crosspoint is constant. The bias circuit applies a bias to the optical modulator based on the bias reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.