Stable transmission of radio frequency signals on fiber links using interferometric delay sensing.
We demonstrate distribution of a 2850 MHz rf signal over stabilized optical fiber links. For a 2.2 km link we measure an rms drift of 19.4 fs over 60 h, and for a 200 m link an rms drift of 8.4 fs over 20 h. The rf signals are transmitted as amplitude modulation on a continuous optical carrier. Variations in the delay length are sensed using heterodyne interferometry and used to correct the rf phase. The system uses standard fiber telecommunications components.
Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA.
Russell
R
Wilcox
J M
JM
Byrd
Lawrence
L
Doolittle
Gang
G
Huang
J W
JW
Staples