Optical heterodyne receiver for fiber optic communications system
US5452118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1993 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Apr 20, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/64
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A monolithic integrated optical heterodyne receiver circuit formed on a single chip and a process of its manufacture are disclosed. The heterodyne receiver circuit essentially includes a tunable local oscillator formed on a substrate for generating a first light beam, a first waveguide coplanarly formed on the substrate adjacent to the local oscillator for transmitting the first light beam, a second waveguide formed on top of the first waveguide for receiving and transmitting an information-encoded second light beam, a coupler region sandwiched between the first and second waveguides for mixing the two light beams, and a pair of detectors mounted in electrical series with one another for converting the mixed light beams to a radio frequency signal operating at an intermediate frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.