Parametric THz-wave generation using trapezoidal LiNbO3

Akihiro Morikawa; Kodo Kawase; Junichi Shikata; Tetsuo Taniuchi; Hiromasa Ito

doi:10.1117/12.361049

9 September 1999 Parametric THz-wave generation using trapezoidal LiNbO₃

Akihiro Morikawa, Kodo Kawase, Junichi Shikata, Tetsuo Taniuchi, Hiromasa Ito

Proceedings Volume 3828, Terahertz Spectroscopy and Applications II; (1999) https://doi.org/10.1117/12.361049
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany

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.

Citation Download Citation

Akihiro Morikawa, Kodo Kawase, Junichi Shikata, Tetsuo Taniuchi, and Hiromasa Ito "Parametric THz-wave generation using trapezoidal LiNbO₃", Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); https://doi.org/10.1117/12.361049

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