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Comparison of THz reflection measurements for a reflection head with separate THz modules and angled beam path versus the integrated THz transceiver module. (a) A photograph of the (open) reflection head including its four parabolic mirrors and the fiber coupled THz transceiver module. In (b), the normalized THz pulse traces are compared, and (c) shows the corresponding dynamic range obtained by dividing the power spectrum by the spectral noise from a blocked THz path.
