Direct detecting of optical PSK signals
US5355243A · kind A · utility
26Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Aug 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/223
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A self homodyne direct detection optical transmission system includes a transmitter in which binary data signals are converted into double differential phase shift keyed (DDPSK) optical signals. The receiver includes a two-path optical interferometer, having a path unbalance optical delay substantially equal to 1 bit period, to which received DDPSK signals are applied. The interferometer output is converted into a plurality of balanced phase diversity outputs. From each of the phase diversity outputs a replica of the binary data signals is recovered and the replica signals are combined to form an output binary data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.