We propose and experimentally demonstrate two optical architectures that process the receive mode of a <i>p</i> × <i>p</i> element phased-array antenna. The architectures are based on free-space propagation and switching of the channelized optical carriers of microwave signals. With the first architecture a direct transposition of the received signals in the optical domain is assumed. The second architecture is based on the optical generation and distribution of a microwave local oscillator matched in frequency and direction. Preliminary experimental results at microwave frequencies of ~3 GHz are presented.
© 1999 Optical Society of America
(040.1240) Detectors : Arrays
(040.2840) Detectors : Heterodyne
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(350.4010) Other areas of optics : Microwaves
Luc Pastur, Sylvie Tonda-Goldstein, Daniel Dolfi, Jean-Pierre Huignard, Thomas Merlet, Olivier Maas, and Jean Chazelas, "Two-Dimensional Optical Architectures for the Receive Mode of Phased-Array Antennas," Appl. Opt. 38, 3105-3111 (1999)