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:
Sep. 20, 2011
Filed:
Dec. 13, 2010
Robert R. Hayes, Calabasas, CA (US);
Willie W. NG, Agoura Hills, CA (US);
Robert R. Hayes, Calabasas, CA (US);
Willie W. Ng, Agoura Hills, CA (US);
HRL Laboratories, LLC, Malibu, CA (US);
Abstract
In one of many possible implementations and embodiments, a method is provided for providing linearized phase modulation and demodulation in an RF-photonic link. This includes phase modulating a photonic carrier signal in a signal arm using the RF input and using the RF output in a negative feedback phase tracking loop to modulate either the RF input modulated carrier signal in the signal arm, or a signal in a local oscillator arm. Optical signals from the signal arm and the local oscillator arm are optically coupled. The optically coupled signals are photodetected and differentally combined. The differentially combined signals are amplified to provide the RF output signal. In some implementations, the photonic carrier signal is suppressed prior to photodetection. Further, in some implementations a small portion of the local oscillator signal may be coupled with the carrier suppressed optical signal.