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    Dynamic calibration of a channeled spectropolarimeter for extended temperature stability

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    Author
    Chrysler, Benjamin D.
    Otani, Yukitoshi
    Hagen, Nathan A.
    Affiliation
    Univ Arizona, Coll Opt Sci
    Issue Date
    2019-09-06
    Keywords
    spectropolarimetry
    polarimetry
    signal processing
    temperature stability
    retarder
    Stokes Vector
    
    Metadata
    Show full item record
    Publisher
    SPIE-INT SOC OPTICAL ENGINEERING
    Citation
    Benjamin D. Chrysler, Yukitoshi Otani, and Nathan Hagen "Dynamic calibration of a channeled spectropolarimeter for extended temperature stability", Proc. SPIE 11132, Polarization Science and Remote Sensing IX, 111320P (6 September 2019); https://doi.org/10.1117/12.2528078
    Journal
    POLARIZATION SCIENCE AND REMOTE SENSING IX
    Rights
    Copyright © (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Channeled Spectropolarimeters (CHSP) are compact optical instruments that have potential for making precise polarization measurements without any moving parts. While most spectropolarimeters use rotating elements to make measurements, CHSPs use mechanically fixed thick retarders to modulate the Stokes vector onto the spectrum of light. In realistic applications, CHSPs must have calibration algorithms that give stable measurements in a variety of environmental conditions. Previous researchers developed a self-calibration algorithm that uses redundant channel information to compensate temperature-induced phase fluctuations in real-time without any additional reference measurements. In this paper we discuss the stability of the self-calibration technique. We identify a mathematical ambiguity in the algorithm that limits the range of temperatures over which the algorithm is stable. For a 60 lambda:120 lambda channeled spectropolarimeter with quartz retarders, the stable temperature range is only 27 degrees C and is not suitable for many applications outside of the laboratory. We propose and demonstrate a modified algorithm that uses the slope of the phase to remove the mathematical ambiguity and extend the temperature range of the system. The demonstration shows stable operation over a 41 degrees C temperature range and shows promise for increasing stability over a temperature range suitable for extreme terrestrial conditions.
    ISSN
    0277-786X
    DOI
    10.1117/12.2528078
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2528078
    Scopus Count
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