DocumentCode :
3691565
Title :
High-speed frequency-domain terahertz coherence tomography
Author :
Ji Sang Yahng;Choon-Su Park;Hwi Don Lee;Chang-Seok Kim;Dae-Su Yee
Author_Institution :
Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea
fYear :
2015
Firstpage :
1
Lastpage :
2
Abstract :
High-speed frequency-domain terahertz (THz) coherence tomography is demonstrated using frequency sweeping of continuous-wave THz radiation and beam steering. THz frequency sweeping with a kHz sweep rate and a THz sweep range is implemented using THz photomixing in which an optical beat source consists of a wavelength-swept laser and a distributed feedback laser diode. During the frequency sweep, frequency-domain THz interferograms are measured using the coherent homodyne detection employing signal averaging for noise reduction, which are used as axial scan data via fast Fourier transform. Axial scan data for 100×100 points can be acquired in 100 s while scanning a transverse range of 100×100 mm2 using a THz beam scanner comprised of a two-dimensional galvanometer scanner and a telecentric f-θ lens.
Keywords :
"Optical transmitters","Tomography","Optical fiber amplifiers","Frequency-domain analysis","High-speed optical techniques"
Publisher :
ieee
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
ISSN :
2162-2027
Electronic_ISBN :
2162-2035
Type :
conf
DOI :
10.1109/IRMMW-THz.2015.7327781
Filename :
7327781
Link To Document :
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