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Proceedings Paper

Broadband frequency-chirped terahertz-wave signal generation using periodically-poled lithium niobate for frequency-modulated continuous-wave radar application
Author(s): Junichi Hamazaki; Yoh Ogawa; Norihiko Sekine; Akifumi Kasamatsu; Atsushi Kanno; Naokatsu Yamamoto; Iwao Hosako
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Paper Abstract

We have proposed a method by using a nonlinear optical technique to generate frequency-modulated (FM) signals in the terahertz (THz) band with much broader bandwidth. Periodically-poled lithium niobates (PPLNs) are excited by ultrashort pulses, and linearly frequency-chirped THz pulses are obtained by changing the periodicity of the PPLN gradually. The bandwidth achieved is approximately 1 THz at a center frequency of 1.5 THz. Using this wave in a FM continuous (CW) radar system is expected to result in a range resolution of ~150 μm. This FM-THz signal generation technique will thus be useful in or future civil safety applications requiring high-resolution ranging or imaging.

Paper Details

Date Published: 25 February 2016
PDF: 6 pages
Proc. SPIE 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 97471J (25 February 2016); doi: 10.1117/12.2210936
Show Author Affiliations
Junichi Hamazaki, National Institute of Information and Communications Technology (Japan)
Yoh Ogawa, National Institute of Information and Communications Technology (Japan)
Norihiko Sekine, National Institute of Information and Communications Technology (Japan)
Akifumi Kasamatsu, National Institute of Information and Communications Technology (Japan)
Atsushi Kanno, National Institute of Information and Communications Technology (Japan)
Naokatsu Yamamoto, National Institute of Information and Communications Technology (Japan)
Iwao Hosako, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 9747:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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