Journal
APPLIED OPTICS
Volume 47, Issue 16, Pages 3023-3026Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.47.003023
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We present a low cost terahertz (THz) spectrometer with coherent detection based on two simple and robust dipole antennas driven by two laser diodes. The spectrometer covers frequencies up to 1 THz, with a peak signal-to-noise ratio exceeding 40 dB for a lock-in integration time of 30 ms. We demonstrate that the thickness profile of a sample can be reconstructed from an acquired THz image. (C) 2008 Optical Society of America.
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