Tomographic Imaging Using Photonically Generated Low-Coherence Terahertz Noise Sources

Author

Isogawa, Takayuki ; Kumashiro, Takuto ; Song, Ho-Jin ; Ajito, Katsuhiro ; Kukutsu, Naoya ; Iwatsuki, Katsumi ; Nagatsuma, Tadao

Author_Institution

Grad. Sch. of Eng. Sci., Osaka Univ., Toyonaka, Japan

Volume

2

Issue

5

fYear

2012

Firstpage

485

Lastpage

492

Abstract

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.

Keywords

nondestructive testing; optical tomography; terahertz wave imaging; amplified spontaneous emission noise; broadband THz noise source; broadband infrared source; frequency 280 GHz to 380 GHz; optical coherence tomography; photonically generated low-coherence terahertz noise source; three-dimensional terahertz imaging; tomographic imaging; Coherence; Interference; Noise; Optical imaging; Power generation; Tomography; Imaging; low-coherence; noise sources; terahertz; tomography;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2012.2208745

Filename

6287627