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A variable partially polarizing beam splitter.

Jefferson Flórez1, Nathan J Carlson1, Codey H Nacke1

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Summary
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We developed novel polarizing beam splitters with independent control over horizontal and vertical polarization. These devices are crucial for quantum optics and quantum information applications.

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Area of Science:

  • Quantum Optics
  • Quantum Information Science

Background:

  • Controlling polarization states is fundamental in quantum optics.
  • Existing methods for polarization control can be complex or lack independent ratio adjustment.

Purpose of the Study:

  • To design and demonstrate variably polarizing beam splitters.
  • To enable independent control of horizontal and vertical polarization splitting ratios.
  • To explore applications in quantum computing and quantum state estimation.

Main Methods:

  • Interferometer-based designs were conceptualized.
  • A displaced Sagnac interferometer configuration was experimentally implemented.
  • Utilized common optical laboratory components.

Main Results:

  • Demonstrated complete and independent control of polarization splitting ratios.
  • The displaced Sagnac interferometer showed inherent instability to environmental factors.
  • The design relies solely on standard, readily available optical components.

Conclusions:

  • The proposed variably polarizing beam splitters offer versatile polarization control.
  • The experimental demonstration validates the feasibility of these designs.
  • These components are suitable for advanced quantum optics and information processing tasks.