Abstract

The use of optical techniques for generating microwave signals and controlling microwave devices has several advantages over more conventional approaches, including improved transmission and modulation capabilities.^1,2 Previous work has demonstrated microwave signal generation up to 35 GHz by heterodyning the outputs of sideband injection-locked semiconductor lasers.^3,4 Radio frequency phase control potentially suitable for phased array antenna applications has also been demonstrated using a He–Ne gas laser and KDP crystal for optical phase shifting.⁵ That work, however, was limited to a rf of 125 MHz and required 260 V for a π phase shift.

© 1990 Optical Society of America