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Proceedings Paper

The implications of partially-coherent signal beams on the performance of interferometric spectrometers in the 30-800 GHz range
Author(s): J. W. Bowen
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Paper Abstract

In the 30-800 GHz range interferometric spectrometers are commonly employed in the spectral characterisation ofmaterials and components. However the multi-octave beams propagating through such spectrometers are not onlydiffractively spreading but have a degree of coherence which changes with frequency resulting in an instrument resolutionfunction that changes with frequency. I will describe how it is now possible to treat partially-coherent signal beamsusing Gauss-Hermite beam-mode analysis and will present numerical models, based on this technique, of the instrumentresolution function of a typical spectrometer.

Paper Details

Date Published: 30 November 2017
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21047O (30 November 2017); doi: 10.1117/12.2298708
Show Author Affiliations
J. W. Bowen, Univ. of London (United Kingdom)


Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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