Polarization properties of a broadband multi-moded concentrator.
J Opt Soc Am A Opt Image Sci Vis
; 32(6): 1040-5, 2015 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-26367036
ABSTRACT
We present the design and performance of a non-imaging concentrator for use in broadband polarimetry at millimeter through submillimeter wavelengths. A rectangular geometry preserves the input polarization state as the concentrator couples f/2 incident optics to a 2π 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 of 94%. After correcting for efficiency, the remaining cross-polar response is -18 dB.
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MEDLINE
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En
Ano de publicação:
2015
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Article