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A 300 THz tabletop radar range system with sub-micron distance accuracy.

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Area of Science:

  • Optics and Photonics
  • Electromagnetics
  • Metrology

Background:

  • Traditional radar systems face limitations in size and complexity for certain applications.
  • Optical methods offer potential for high-precision measurements at smaller scales.

Purpose of the Study:

  • To present a compact optical system capable of simulating radar ranging measurements.
  • To demonstrate the system's accuracy and potential for characterizing complex targets.

Main Methods:

  • Utilized interferometric time-of-flight with a 100 fs laser pulse at optical wavelengths (300 THz).
  • Employed a tabletop system with a scale factor of 10^5.
  • Compared optical measurements with radio frequency (RF) measurements using a vector network analyzer.

Main Results:

  • Achieved sub-micron range accuracy, equivalent to 3 cm for S-band radar.
  • Successfully demonstrated system potential on a simple target and a 3D printed model of the USS Arizona.
  • Extracted a 3D model from ranging data of the complex target.

Conclusions:

  • The optical system effectively simulates radar ranging properties with high precision.
  • This technology provides a viable tabletop alternative for radar measurements and target characterization.
  • Further validates the use of optics for simulating complex radio frequency systems.