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Interferometric polarization control.

David T Chuss1, Edward J Wollack, S Harvey Moseley

  • 1NASA Goddard Space Flight Center, Maryland 20771, USA. David.T.Chuss@nasa.gov

Applied Optics
|July 11, 2006
PubMed
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We developed a new polarization modulator using linear motions, enabling full polarization measurement. This offers advantages for astronomical polarization studies, including circular polarization detection.

Area of Science:

  • Optical physics
  • Astronomical instrumentation

Background:

  • Polarization modulation is crucial for astronomical observations.
  • Existing methods like spinning wave plates have limitations.

Purpose of the Study:

  • To develop a novel polarization modulator for astronomical applications.
  • To enable full polarization measurement (Stokes Q, U, V) with enhanced flexibility.

Main Methods:

  • Developed Jones and Mueller matrices for polarization control structures.
  • Analyzed series configurations of polarization modulators.
  • Investigated the effect of grid angles and analyzer orientation.

Main Results:

  • Demonstrated that two series-coupled modulators can achieve full polarization modulation.

Related Experiment Videos

  • Identified advantages over spinning wave plate modulators: no cryogenic bearings, phase flexibility for circular polarization, and multiwavelength capability.

    • Conclusions:

    • The proposed polarization modulator architecture is a viable alternative for astronomical polarization measurements.
    • This technology offers significant improvements for far-infrared to millimeter wave astronomy.