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Figure 2
(Left) Experimental setup for the benchmarking of the THz spectrometer chip. The TELBE beam can be dimmed by means of a set of polarizing filters based on wire grids. Part of the beam can be taken to a calibrated reference detector. The spectral content of the beam can be filtered by THz bandpass filters. The beam can also be taken to a novel pulse-resolved THz diagnostic setup based on single-shot electro-optic sampling (Kovalev et al., 2017BB18) and to a time-domain spectroscopy set-up (top). (Right) Image of a typical beam profile after focusing by a 150 mm focal length off-axis parabola. The dimensions are in the few millimetre range and hence of the order of the THz spectrometer chip.

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