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arXiv · 1503.04206

Polarization Properties of A Multi-Moded Concentrator

A. Kogut·D. J. Fixsen·R. S. Hill
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Abstract

We present the design and performance of a non-imaging concentrator for use in broad-band polarimetry at millimeter through submillimeter wavelengths. A rectangular geometry preserves the input polarization state as the concentrator couples f/2 incident optics to a 2 pi sr detector. Measurements of the co-polar and cross-polar beams in both the few-mode and highly over-moded limits agree with a simple model based on mode truncation. The measured co-polar beam pattern is nearly independent of frequency in both linear polarizations. The cross-polar beam pattern is dominated by a uniform term corresponding to polarization efficiency 94%. After correcting for efficiency, the remaining cross-polar response is -18 dB.

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A. Kogut, D. J. Fixsen, R. S. Hill. 2015-03-13. Polarization Properties of A Multi-Moded Concentrator. https://doi.org/10.1364/josaa.32.001040

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