Optical transmitter
US8145069B2 · kind B2 · utility
9Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2007 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Dec 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal Data1 and Data2 are output from a DQPSK signal source. The output signal is input to the modulator drivers 1 and 2 of the differential output. A drive signal is applied from the drivers 1 and 2 to a modulator, and modulated light is output. An optical coupler 20 branches modulator output, and a power monitor 21 detects the power of the branched light. A detection result is transmitted to an amplitude control unit 22. The amplitude control unit 22 adjusts the amplitude of the drivers 1 and 2 such that the detection result of the power monitor 21 can be the maximum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.