Title

Photonic signal processing for inverse synthetic aperture radar imaging

Keywords

Acousto-optic processor; Inverse synthetic aperture radar imaging

Abstract

A robust signal processor, capable of handling a multitude of signal processing functions over a wide instantaneous signal bandwidth is needed for future military systems where shared sensor and signal processing resources will be employed. We investigated a novel two dimensional acousto-optic (AO) processor capable of real-time multifunction signal processing. We developed the specifications for an optoelectronic ISAR image formation processor for ship imaging based upon the AN/APS-137(H) Airborne Radar. The baseline processor is designed for high resolution imaging - slant range resolution of 0.3 m and cross range resolution of 1.2 m over 30 m × 30 m window. The optical design of the processor is based on an optically efficient, in-line, high stability, two dimensional interferometer using four acousto-optic devices invented by Riza1. We developed specifications for the processor components, including light source, lenses, photodetector array, and Bragg cells including a multichannel Brag cell to improve processor bandwidth and reduce its size. We showed that all of these components are commercially available. We breadboarded a narrow bandwidth version of the processor and demonstrated its main operating features. We showed experimentally that the processor has simultaneous spatial carrier generation capability that is controllable with high phase stability and excellent fringe visibility.

Publication Date

12-1-1998

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

3388

Number of Pages

62-76

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.319435

Socpus ID

0032345670 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0032345670

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