炭酸ガスレーザー用高速プラズマ・シャッターの試作

抄録

A plasma shutter having two ZnSe lenses has been developed with the intention of applying it to the generation of ultrashort pulses in the far-infrared and millimeter wavelength range. A fast truncation time of about 1.5 ns was obtained by the plasma shutter, which is approximately the same as the response time of the measurement system. It was found experimentally that truncation waveforms were dependent on both the detection location in the laser beam cross section and the N₂ gas pressure inside the shutter chamber. A physical explanation for the above experimental results is given briefly.