Optical output module, optical transceiver, and optical transmission system
US8909067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/50577
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The I phase modulator modulates a phase based on the bias voltage in which a first modulation signal and a first pilot signal are inherent and the Q phase modulator modulates a phase based on the bias voltage in which a second pilot signal different from the first pilot signal and a second modulation signal are inherent. A time-average power synchronous detection unit detects an optical power at a timing at which the positivity and negativity of the voltages of both pilot signals become the same, and an optical power when the positivity and negativity of the voltages of both pilot signals are opposite. The bias voltage control unit controls the bias voltage so that the difference between both the optical powers becomes small based on the detection result of the time-average power synchronous detection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.