Optical transmitter
US10284302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2018 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | May 23, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/588
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmitter includes an optical modulator that includes a first phase shifter for a most significant bit, a second phase shifter for a least significant bit, and a third phase shifter for fine adjustment, the first phase shifter, the second phase shifter, and the third phase shifter are disposed along an optical waveguide, and a drive circuit that includes a first driver that drives the first phase shifter, a second driver that drives the second phase shifter, and a third driver that drives the third phase shifter, wherein a drive polarity of the third driver is adjustable in a positive direction and a negative direction, and the third phase shifter adjusts an amount of phase change of the optical modulator in a positive direction or a negative direction based on a drive voltage inputted from the third driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.