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Multigigahertz range-Doppler correlative signal processing in optical memory crystals.

Todd L Harris1, Kristian D Merkel, R Krishna Mohan

  • 1Spectrum Laboratory, Box 173510, Montana State University, Bozeman, Montana 59717-3510, USA. todd.harris@sri.com

Applied Optics
|January 21, 2006
PubMed
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Researchers demonstrated analog optical signal processing for radar using crystalline optical memory. This novel approach achieves high-resolution range and Doppler information for target detection.

Area of Science:

  • Photonics
  • Radar Systems Engineering
  • Materials Science

Background:

  • Radio-frequency (RF) signal processing is crucial for radar systems.
  • Analog optical methods offer potential advantages in speed and bandwidth for complex signal analysis.
  • Crystalline optical memory materials present unique properties for data storage and processing.

Purpose of the Study:

  • To theoretically describe and experimentally demonstrate analog optical signal processing for range-Doppler radar information.
  • To model the range-Doppler processing capability of crystalline optical memory for single-target detection.
  • To evaluate the performance of this system using emulated radar signals.

Main Methods:

  • Utilized crystalline optical memory materials and standard photonic components.

Related Experiment Videos

  • Emulated broadband, spread-spectrum, pseudorandom noise radar signals (binary phase-shift keyed on a 1.9 GHz carrier).
  • Processed signals with the memory material to extract range and Doppler information.

    • Main Results:

    • Achieved a delay (range) resolution of 8 nanoseconds.
    • Demonstrated a Doppler resolution of 130 Hz within a 100 kHz bandwidth.
    • Successfully processed complex RF signals for radar applications.

    Conclusions:

    • Analog optical signal processing using crystalline optical memory is a viable method for radar range-Doppler information.
    • The demonstrated system offers high resolution for target detection.
    • This technology has potential for advanced radar system development.