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Proceedings Paper

Complex-domain sparse imaging in terahertz pulse time-domain holography with balance detection
Author(s): Maksim S. Kulya; Vladimir Katkovnik; Karen Egiazarian; Nikolay V. Petrov
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Paper Abstract

Terahertz pulse time-domain holography (THz PTDH) is an ultimate technique both for the measurement of object optical properties and broadband wavefront sensing. However, THz PTDH has valuable restriction connected with low signal-to-noise ratio which becomes a serious issue in coherent measurements. This noise problem could be solved by filtering with use of modern block-matching algorithms based on nonlocal similarity of small patches of images existing in investigated objects. Here we present the study on the use of denoising algorithms applied for hyperspectral THz data in the spatio-temporal and spatial-spectral domain. We provide a numerical simulation of denoising in case of broadband uniform topologically charged (BUTCH) beam of pulsed THz radiation.

Paper Details

Date Published: 2 March 2020
PDF: 7 pages
Proc. SPIE 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII, 1127921 (2 March 2020); doi: 10.1117/12.2549001
Show Author Affiliations
Maksim S. Kulya, ITMO Univ. (Russian Federation)
Tampere Univ. (Finland)
Vladimir Katkovnik, Tampere Univ. (Finland)
Karen Egiazarian, Tampere Univ. (Finland)
Nikolay V. Petrov, ITMO Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 11279:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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