Abstract

Analog optical signal processing of complex radio-frequency signals for range-Doppler radar information is theoretically described and experimentally demonstrated using crystalline optical memory materials and off-the-shelf photonic components. A model of the range-Doppler processing capability of the memory material for the case of single-target detection is presented. Radarlike signals were emulated and processed by the memory material; they consisted of broadband $(>1\mathrm{GHz})$, spread-spectrum, pseudorandom noise sequences of $512\mathrm{bits}$ in length, which were binary phase-shift keyed on a $1.9\mathrm{GHz}$ carrier and repeated at $100\mathrm{kHz}$ over $7.5\mathrm{ms}$. Delay (range) resolution of $8\mathrm{ns}$ and Doppler resolution of $130\mathrm{Hz}$ over $100\mathrm{kHz}$ were demonstrated.

© 2006 Optical Society of America

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