部分重水素置換KDP結晶の育成

抄録

Short wavelength light generation is a trend in a field of applications of laser such as information process, material processing and laser fusion. The energy driver at nuclear fusion experiments required an efficient generation of short wavelength light with a partially coherency for irradiation uniformity improvement. The partially coherent light has wide spectral width and large beam divergence of which the hamonic conversion efficiency is greatly degraded. An arrowance of the spectral bandwidth of the lowly deuterated KDP crystal is estimated larger than that of the KDP or highly deuterated KDP. It was found that the deuterated ratio of the grown crystal was lower than that of the growth solution and the distribution coefficient of deuterium decreased with decreasing of deuterated ratio of the growth solution. The distribution of deuterated ratio in the grown crystal was shown constant within the measuremental error. It was also demonstrated that 10 cm class 13% KD^*P crystals were grown very easily.