Abstract
Potassium lithium niobate ( K3Li2-X Nb5+X O15+2X : KLN) crystals are difficult to grow by conventional crystal growth methods because of the distinct change of composition. Using the micro pulling down ( µ-PD) method, crack-free and homogeneous KLN crystals with a length of 150 mm and diameters of 150, 300 and 500 µm have been grown successfully. The crystals show good structural quality, single-domain structure and an excellent second harmonic generation property. The red irradiation of a Ti: sapphire laser and semiconductor laser diode was converted by µ-PD crystals to blue laser light with half wavelength.
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