DQPSK optical receiver circuit
US7444085B2 · kind B2 · utility
16Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jan 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A DQPSK optical signal is split by the splitter 1 into Data 1 and Data 2 systems. For each system, a phase-modulated optical signal is converted into an intensity modulated electric signal, and clock reproduction and data reproduction are independently carried out for each system. While a phase difference occurs between the data of each system, a clock signal having an intermediate phase of the reproduced clock of each system is generated to latch data of both systems by using the clock signal. This results in the data of both systems having the same phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.