31 May 2013 Employing phase modulation and second harmonic nulling to eliminate the interference fringes from the spectrum of a portable coherent frequency-domain THz spectrometer
Author Affiliations +
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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joseph R. Demers, Joseph R. Demers, Bryon L. Kasper, Bryon L. Kasper, } "Employing phase modulation and second harmonic nulling to eliminate the interference fringes from the spectrum of a portable coherent frequency-domain THz spectrometer", Proc. SPIE 8716, Terahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense, 87160M (31 May 2013); doi: 10.1117/12.2016054; https://doi.org/10.1117/12.2016054
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT


Back to Top