Optical heterodyne receiver and method of extracting data from a phase-modulated input optical signal
US7650084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2005 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Jun 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/615
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical heterodyne receiver and a method of extracting data from a phase-modulated input optical signal. In one embodiment, the optical heterodyne receiver includes: (1) a photonic quadrature demodulator having first and second optical inputs and first and second electrical outputs and configured to generate at the first and second electrical outputs an in-phase signal and a quadrature-phase signal, respectively, in response to receiving a modulated optical signal at the first optical input and a reference optical oscillator signal at the second optical input, (2) a passive radio frequency single sideband demodulator coupled to the photonic quadrature demodulator and configured to extract at least one sideband of the in-phase signal or the quadrature-phase signal and (3) at least one analog-to-digital converter coupled to the passive radio frequency single sideband demodulator and configured to receive and sample the at least one sideband.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.