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Proceedings Paper

Parametric THz-wave generation using trapezoidal LiNbO3
Author(s): Akihiro Morikawa; Kodo Kawase; Junichi Shikata; Tetsuo Taniuchi; Hiromasa Ito
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Paper Abstract

A compact tunable terahertz (THz)-wave source that operates at room temperature has been realized by introducing a novel configuration of a laser-pumped parametric oscillator using a trapezoidal LiMbO3 crystal. We used total reflection for the pump and resonated idler waves under noncollinear phase-matching conditions by using a trapezoidal LiNbO3 crystal, so that the interacting position was located at the THz-wave exit surface, and direct radiation could be produced without any coup;ling devices. Continuously tunable coherent THz-wave radiation was successfully demonstrated at wavelengths from 130-310 micrometers with a maximum output of 45pJ/pulse. In addition, the THz-wave had an excellent, circular Gaussian-like beam profile with a divergence of 2.4 degrees. Out parametric method has several advantages over other methods. This easy to use compact system has wide tunability, coherency, a relatively high peak power, and a single fixed wavelength pump source. These features will be useful for a wide range of applications.

Paper Details

Date Published: 9 September 1999
PDF: 9 pages
Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); doi: 10.1117/12.361049
Show Author Affiliations
Akihiro Morikawa, Tohoku Univ. (Japan)
Kodo Kawase, RIKEN--The Institute for Chemical and Physical Research (Japan)
Junichi Shikata, Tohoku Univ. (Japan)
Tetsuo Taniuchi, Tohoku Univ. (Japan)
Hiromasa Ito, Tohoku Univ. and RIKEN--The Institute for Chemical and Physical Research (Japan)


Published in SPIE Proceedings Vol. 3828:
Terahertz Spectroscopy and Applications II
J. Martyn Chamberlain, Editor(s)

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