Polarization Properties of A Multi-Moded Concentrator
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.
Cite
@article{arxiv.1503.04206,
title = {Polarization Properties of A Multi-Moded Concentrator},
author = {A. Kogut and D. J. Fixsen and R. S. Hill},
journal= {arXiv preprint arXiv:1503.04206},
year = {2023}
}
Comments
9 pages including 8 figures. Accepted for publication in the Journal of the Optical Society of America A