Method and apparatus for digitally and automatically controlling a bias voltage of electro-optic optical modulator
US10158428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2017 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Aug 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/516
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for digitally and automatically controlling a bias voltage of an electro-optic optical modulator are disclosed. The method includes: outputting a scanning bias voltage; acquiring a first optical signal; converting the first optical signal into a first electrical signal; outputting a first direct current signal; calculating an operating bias voltage at each operating point and a half-wave voltage; calculating an error feedback coefficient and a dither amplitude; outputting an operating bias voltage and a dither signal with the dither amplitude; acquiring a second optical signal; converting the second optical signal into a second electrical signal; outputting a harmonic component; calculating a harmonic amplitude and a shift phase; calculating a new bias voltage; and using the new bias voltage as the operating bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.