A compact prototype optical processor for X-band arrays

Presents the realization and preliminary characterization of a compact two-channel optical processor for an X-band antenna array. This lens array partially separates the signals based on their angle of arrival. The received audio-modulated signals, downconverted to HF band, drive a two-channel electro-optic modulator. The optical beam is carrier suppressed and sent to a miniature adaptive photorefractive oscillator that separates the signals based on their strength and correlation. The optical output is detected, demodulated and sent to a speaker. The system fits in a 33/spl times/45/spl times/15cm briefcase and consumes less than 20W. The prototype is also equipped with portable transmitters for on-site demonstration purposes.