The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2008
Filed:
Feb. 10, 2005
Wenshen Wang, Torrance, CA (US);
David C. Scott, Lakewood, CA (US);
Thomas Jin-ming Jung, Rolling Hills Estates, CA (US);
Joseph Morais, Torrance, CA (US);
Wenshen Wang, Torrance, CA (US);
David C. Scott, Lakewood, CA (US);
Thomas Jin-Ming Jung, Rolling Hills Estates, CA (US);
Joseph Morais, Torrance, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
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 () is operable to generate a first optical signal having an operating frequency. A second optical source () is operable to generate a second optical signal having an operating frequency. A modulator () 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 () 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 () is responsive to the combined signal to generate a tone signal. An offset locking circuit (), responsive to the tone signal, controls the operating frequency of the optical sources (and) such that the first optical signal and the second optical signal are frequency locked.