环己二胺四乙酸(DCTA)作为一种新型添加剂被加入到KDP晶体生长溶液中.采用“点籽晶”快速生长技术,在掺杂100×10-6 DCTA的饱和溶液中,生长了KDP晶体,生长速度达20 mm/d.研究了这种新型添加剂DCTA对快速生长的KDP晶体的生长习性和光学质量的影响,并与常用添加剂EDTA的影响效果进行了对比.研究发现,在KDP晶体生长溶液中添加100×10-6 DCTA使生长溶液的亚稳区宽度提高了约10℃,晶体(100)面的生长速度提高了3～10倍;生长出的晶体在紫外波段的透过率上升了2～8倍,晶体内部的光散射大大减轻,激光损伤阈值也有所提高.添加剂DCTA对KDP晶体生长及性能的改善作用比同等浓度的EDTA更加显著.
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