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.
Wilcox
Russell
R
Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA.
Byrd
J M
JM
Doolittle
Lawrence
L
Huang
Gang
G
Staples
J W
JW