The implications of partially-coherent signal beams on the performance of interferometric spectrometers in the 30-800 GHz range

J. W. Bowen

doi:10.1117/12.2298708

30 November 2017 The implications of partially-coherent signal beams on the performance of interferometric spectrometers in the 30-800 GHz range

J. W. Bowen

Author Affiliations +

Proceedings Volume 2104, 18th International Conference on Infrared and Millimeter Waves; 21047O (2017) https://doi.org/10.1117/12.2298708
Event: 18th International Conference on Infrared and Millimeter Waves, 1993, Colchester, United Kingdom

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.

Citation Download Citation

J. W. Bowen "The implications of partially-coherent signal beams on the performance of interferometric spectrometers in the 30-800 GHz range", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21047O (30 November 2017); https://doi.org/10.1117/12.2298708

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