Incoherent, spatially-mapped THz spectral analysis

We employ a lens-coupled CMOS terahertz camera to measure the dispersion of an inexpensive reflective diffraction grating. Thus, although the terahertz camera was originally intended for terahertz imaging applications, we show that it can be re-purposed to perform spectral analysis. Two different experiments to determine the spectral content of a source under test are performed. These experiments target separate frequency bands, and hence they must make use of different sources and gratings. As such, we demonstrate a modular and low-cost technique for spectral analysis in the terahertz range.

This document is the accepted manuscript version that has been published in final form in: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

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