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A terahertz (THz) vibrometer based on a photomixing self-heterodyne system for measuring the vibration of an object behind an opaque barrier is reported. The proposed THz vibrometer employs a phase noise compensation technique to reduce the phase noise of the system and thereby improves the signal-to-noise ratio (SNR) of the system. In this letter, the performance of THz vibrometers with and without...
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