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Yamauchi, Toshihiko; Kikuzawa, Nobuhiro; Minehara, Eisuke; Nagai, Ryoji
Technical Digest on 4th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2001), p.I_426 - I_427, 2001/00
The second harmonic generation (SHG) signal converted from the 22 microns input wavelength of free electron laser (FEL) is observed using a non-birefringent CdTe crystal and a birefringent Te crystal. The conversion efficiency of SHG is obtained to be 2.2 x 10
% (7.3 x 10
%/(MW cm)) in CdTe crystal and 0.4 % in Te crystal experimentally. The experimental -phase-matching angle of Te crystal is 9.62
.
Yamauchi, Toshihiko; Ito, Shinichi*; Minehara, Eisuke
Technical Digest on 4th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2001), p.I_148 - I_149, 2001/00
The decomposition of dioxin analogues by infrared (IR) laser irradiation includes thermal destruction and multiple-photon dissociation. It is important for the decomposition to choose the laser wavelength which is highly absorbed. The thermal decomposition takes place by the irradiation of the low IR laser power. Considering the model of thermal decomposition, it is discussed that the adjacent water vapor assists the decomposition (dechlorination) of dioxin analogues in addition to the thermal decomposition by the direct laser absorption.