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Demonstration of spectral and spatial interferometry at THz frequencies

Grainger, William F., Juanola-Parramon, Roser, Ade, Peter A. R., Griffin, Matthew Joseph, Liggins, Flo, Pascale, Enzo, Savini, Giorgio and Swinyard, Bruce 2012. Demonstration of spectral and spatial interferometry at THz frequencies. Applied Optics 51 (12) , pp. 2202-2211. 10.1364/AO.51.002202

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Abstract

A laboratory prototype spectral-spatial interferometer has been constructed to demonstrate the feasibility of the double-Fourier technique at far infrared (FIR) wavelengths (0.15–1 THz). It is planned to use this demonstrator to investigate and validate important design features and data-processing methods for future astronomical FIR interferometer instruments. In building this prototype, we have had to address several key technologies to provide an end–end system demonstration of this double-Fourier interferometer. We report on the first results taken when viewing single-slit and double-slit sources at the focus of a large collimator used to simulate real sources at infinity. The performance of the prototype instrument for these specific field geometries is analyzed to compare with the observed interferometric fringes and to demonstrate image reconstruction capabilities.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Optical Society of America
ISSN: 0003-6935
Last Modified: 04 Jun 2017 04:11
URI: http://orca-mwe.cf.ac.uk/id/eprint/34362

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