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Applications Of Fiber And Integrated Optics To Radar Signal Processing

Applications of fiber and integrated optics to wideband radar signal processing are discussed. The systems requirements dictated by radar parameters (e.g., time-bandwidth product, dynamic range, etc.) are indicated and it is shown that optical techniques can provide a means for meeting these requirements. Examples of applications which are discussed include: (1) fiber-optic delay lines for pulse-to-pulse integration of wideband, high-resolution radar returns; (2) implementation of a noncoherent, high-resolution moving target indicator (MTI); (3) fiber-optic tapped delay lines for use as matched filters for detection, identification, and pattern recognition; and (4) a high-speed electro-optic analog-to-digital (A/D) converter. The devices required for realization of the above are described. These devices include laser diodes, avalanche photodiodes, and optical waveguides and switches. The properties of optical fibers relative to their application to the signal processing functions above are also discussed.