Open AccessStudy of imaging system based on the tunable terahertz wave source with quasi-Gaussian beam output
Author(s) -
Xianbin Zhang,
Wei Shi
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.4984
Subject(s) - terahertz radiation , optics , beam (structure) , physics , gaussian beam , laser beam quality , gaussian , terahertz metamaterials , wavelength , photomixing , materials science , far infrared laser , laser , laser beams , quantum mechanics
A terahertz wave imaging system based on the tunable terahertz source with the quasi-Gaussian beam output is reported. In this imaging system, terahertz wave beam is easy to be focused and transmitted owing its spatial distribution with the excellent beam quality factor of M2x1.15 and M2z1.25. The experimental results show the spatial resolving power of this imaging system is close to the typical terahertz wavelength of 250μm. In the output range of 1.0—2.5THz, the signal to noise ratio (SNR) is higher than 1000dB, and the SNR is above 6000dB at 1.8THz. Based on this system, the terahertz imaging experiments for the several samples were performed, and clear pictures were obtained.