Off quadrature Mach-Zehnder modulator biasing
US10116391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2017 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Nov 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to telecommunication techniques and integrated circuit (IC) devices. More specifically, embodiments of the present invention provide an off-quadrature modulation system. Once an off-quadrature modulation position is determined, a ratio between DC power transfer amplitude and dither tone amplitude for a modulator is as a control loop target to stabilize off-quadrature modulation. DC power transfer amplitude is obtained by measuring and sampling the output of an optical modulator. Dither tone amplitude is obtained by measuring and sampling the modulator output and performing calculation using the optical modulator output values and corresponding dither tone values. There are other embodiments as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.