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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Spatial heterodyne interferometry with polarization gratings.

Michael W Kudenov1, Matthew N Miskiewicz, Michael J Escuti

  • 1Department of Electrical & Computer Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA. mike.kudenov@ncsu.edu

Optics Letters
|November 2, 2012
PubMed
Summary

A new polarization-based spatial heterodyne interferometer (SHI) uses robust prisms and gratings. This compact sensor offers subangstrom resolution for spectroscopy in diverse applications.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Sensor Technology

Background:

  • Conventional spatial heterodyne interferometers (SHI) often rely on Michelson interferometers and diffraction gratings.
  • These components can be sensitive to environmental factors and may limit miniaturization.
  • There is a need for more compact and robust interferometric designs for advanced spectroscopy.

Purpose of the Study:

  • To implement and theoretically model a novel polarization-based spatial heterodyne interferometer (SHI).
  • To demonstrate a compact, monolithic sensor design for high-resolution spectroscopy.
  • To validate the theoretical model with experimental data from a proof-of-concept device.

Main Methods:

  • Utilized mechanically robust Wollaston prisms and polarization gratings instead of traditional Michelson interferometer components.
  • Developed a theoretical model to describe the operational principles of the polarization SHI.
  • Conducted proof-of-concept experiments to validate the theoretical model and device performance.

Main Results:

  • Successfully implemented a polarization-based spatial heterodyne interferometer (SHI).
  • The theoretical model accurately predicted the performance of the polarization SHI, validated by experimental data.
  • The developed device demonstrates potential for subangstrom spectral resolution.

Conclusions:

  • The polarization SHI offers a compact and robust alternative to conventional designs.
  • This technology is well-suited for high-resolution spectroscopy in demanding environments.
  • Potential applications include remote sensing, biomedical imaging, and machine vision.