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Proceedings Paper

Phase-controlled polarization modulators
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Paper Abstract

We report technology development of millimeter/submillimeter polarization modulators that operate by introducing a variable, controlled phase delay between two orthogonal polarization states. The variable-delay polarization modulator (VPM) operates via the introduction of a variable phase delay between two linear orthogonal polarization states, resulting in a variable mapping of a single linear polarization into a combination of that Stokes parameter and circular (Stokes V) polarization. Characterization of a prototype VPM is presented at 350 and 3000 microns. We also describe a modulator in which a variable phase delay is introduced between right- and left- circular polarization states. In this architecture, linear polarization is fully modulated. Each of these devices consists of a polarization diplexer parallel to and in front of a movable mirror. Modulation involves sub-wavelength translations of the mirror that change the magnitude of the phase delay.

Paper Details

Date Published: 5 October 2012
PDF: 6 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 84521Y (5 October 2012); doi: 10.1117/12.925214
Show Author Affiliations
David T. Chuss, NASA Goddard Space Flight Ctr. (United States)
Edward J. Wollack, NASA Goddard Space Flight Ctr. (United States)
G. Novak, Northwestern Univ. (United States)
Giampaolo Pisano, The Univ. of Manchester (United Kingdom)
J. R. Eimer, The Johns Hopkins Univ. (United States)
S. H. Moseley, NASA Goddard Space Flight Ctr. (United States)
M. Krejny, BAE Systems (United States)
K. U-Yen, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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