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Tomographic Imaging Using Photonically Generated Low-Coherence Terahertz Noise Sources

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7 Author(s)
Isogawa, T. ; Grad. Sch. of Eng. Sci., Osaka Univ., Toyonaka, Japan ; Kumashiro, T. ; Ho-Jin Song ; Ajito, K.
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Three-dimensional (3D) terahertz (THz) imaging or THz tomography has recently proven to be powerful for non-destructive testing of industrial materials and structures. In order to reduce complexity and cost of conventional THz tomography systems, we propose a new approach using broadband THz noise sources based on amplified spontaneous emission noise, which is analogous to the optical coherence tomography (OCT) using broadband infrared sources. We have experimentally demonstrated a 3D imaging system with depth and spatial resolutions of 1 and 2 mm, respectively, by 280-380 GHz band noise signals.

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Terahertz Science and Technology, IEEE Transactions on  (Volume:2 ,  Issue: 5 )