Photonic RF distribution system
US7379672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Aug 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25751
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is operable to generate a first optical signal having an operating frequency. A second optical source (44) is operable to generate a second optical signal having an operating frequency. A modulator (46) is operable to impress an RF modulation signal on a tapped portion of the first optical signal such that a modulated signal is generated. A first coupler (52) combines the modulated signal with a tapped portion of the second optical signal, thereby forming a combined signal having a difference frequency component. A control photodetector (50) is responsive to the combined signal to generate a tone signal. An offset locking circuit (56), responsive to the tone signal, controls the operating frequency of the optical sources (42 and 44) such that the first optical signal and the second optical signal are frequency locked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.