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Fast 2-D and 3-D Terahertz Imaging With a Quantum-Cascade Laser and a Scanning Mirror

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6 Author(s)
Nick Rothbart ; Institute of Panetary Research, German Aerospace Center (DLR), Berlin, Germany ; Heiko Richter ; Martin Wienold ; Lutz Schrottke
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A terahertz imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. Transmission images are obtained by scanning the beam of the QCL across an object. Images with a diameter of approximately 40 mm and a signal-to-noise ratio of up to 28 dB were obtained within 1.1 s. The system was also used to obtain three-dimensional images of objects in an ellipsoidal volume with axes of approximately 40 mm by computed tomography within 87 s.

Published in:

IEEE Transactions on Terahertz Science and Technology  (Volume:3 ,  Issue: 5 )