9 September 1999 Parametric THz-wave generation using trapezoidal LiNbO3
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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
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Akihiro Morikawa, Akihiro Morikawa, Kodo Kawase, Kodo Kawase, Junichi Shikata, Junichi Shikata, Tetsuo Taniuchi, Tetsuo Taniuchi, Hiromasa Ito, Hiromasa Ito, "Parametric THz-wave generation using trapezoidal LiNbO3", Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); doi: 10.1117/12.361049; https://doi.org/10.1117/12.361049

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