KDP single crystal growth via three-dimensional motion growth method

摘要

A novel system for rapid crystal growth, namely three-dimensional motion growth method ("3D MGM") was proposed. Using this system, a potassium dihydrogen phosphate (KDP) seed was grown to a single crystal with a final size of 50x55x85 mm(3). The KDP crystal was characterized by Raman spectroscopy, UV-vis-NIR spectroscopy, extinction ratio, laser damage threshold, and etching studies. Raman spectrum shows KDP crystal grown by "3D MGM" maintains good crystallinity as that grown by rotating-crystal method ("RCM"). The "3D MGM" grown KDP crystal has much better transmittance, higher extinction ratio, higher damage threshold and less dislocation density, compared to "RCM" grown crystal.