Dual channel phase locked optical homodyne receiver
US3970838A · kind A · utility
16Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1975 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Aug 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/63
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved homodyne receiver for use in wideband optical communications systems is disclosed. The receiver utilizes dual channelization of the optical input signal in the manner of a Costas two-phase synchronous receiver. A novel beam-splitting/phase-splitting optical assembly is used to channelize the received and the local oscillator beams and insure the desired phase relationships. The receiver is capable of phase-locked operation in the presence of noise and frequency variations in the received and local oscillator signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.