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Proceedings Paper

Employing phase modulation and second harmonic nulling to eliminate the interference fringes from the spectrum of a portable coherent frequency-domain THz spectrometer
Author(s): Joseph R. Demers; Bryon L. Kasper
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Paper Abstract

Interpreting the spectrum from a continuous wave frequency domain terahertz spectrometer that employs coherent detection can be challenging due to the presence of an interference pattern. We report on the continued progress of a portable, battery-operated frequency domain terahertz spectrometer with an integrated, fiber-coupled, lithium-niobate optical phase-modulator and how we achieve interference fringe elimination using phase modulation and second harmonic nulling. The implications for both transmission and reflection measurements are discussed and data on the explosive compound RDX will be presented.

Paper Details

Date Published: 31 May 2013
PDF: 9 pages
Proc. SPIE 8716, Terahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense, 87160M (31 May 2013); doi: 10.1117/12.2016054
Show Author Affiliations
Joseph R. Demers, EMCORE Corp. (United States)
Bryon L. Kasper, EMCORE Corp. (United States)


Published in SPIE Proceedings Vol. 8716:
Terahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense
Mehdi F. Anwar; Thomas W. Crowe; Tariq Manzur, Editor(s)

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