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Low jitter RF distribution system

United States Patent

8,270,844
September 18, 2012
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
A timing signal distribution system includes an optical frequency stabilized laser signal amplitude modulated at an rf frequency. A transmitter box transmits a first portion of the laser signal and receive a modified optical signal, and outputs a second portion of the laser signal and a portion of the modified optical signal. A first optical fiber carries the first laser signal portion and the modified optical signal, and a second optical fiber carries the second portion of the laser signal and the returned modified optical signal. A receiver box receives the first laser signal portion, shifts the frequency of the first laser signal portion outputs the modified optical signal, and outputs an electrical signal on the basis of the laser signal. A detector at the end of the second optical fiber outputs a signal based on the modified optical signal. An optical delay sensing circuit outputs a data signal based on the detected modified optical signal. An rf phase detect and correct signal circuit outputs a signal corresponding to a phase stabilized rf signal based on the data signal and the frequency received from the receiver box.
Wilcox; Russell (El Cerrito, CA), Doolittle; Lawrence (Walnut Creek, CA), Huang; Gang (Albany, CA)
The Regents of the University of California (Oakland, CA)
12/ 625,135
November 24, 2009
STATEMENT OF GOVERNMENTAL SUPPORT This invention was made in the course of or under prime contract No. DE-ACO2-05CH11231 between the Department of Energy and the University of California. The government has certain rights in this invention.