Title :
Voltage-controlled optical/RF phase shifter
Author :
Soref, Richard A.
Author_Institution :
USAF Rome Laboratories, Hanscom Air Force Base, MA, USA
fDate :
10/1/1985 12:00:00 AM
Abstract :
A new fiber-optic device designed to steer the radiation beam of a phased-array antenna has been demonstrated. A radiofrequency (RF) signal at 125 MHz is generated via photomixing at the output of a single-mode fiber-optic interferometer. The phase of the electrical signal is shifted over several cycles in direct proportion to a voltage applied to an optical controller. The controller consists of a Pockels-type optical phase modulator located in one arm of the heterodyne interferometer. Rapid changes in RF phase are feasible. A miniature low-voltage version of the device, based upon integrated optics, is proposed.
Keywords :
Optical fiber applications; Phased arrays; Optical control; Optical fiber devices; Optical interferometry; Optical mixing; Optical modulation; Phase shifters; RF signals; Radio frequency; Signal generators; Voltage;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.1985.1074305
