Abstract
Due to their incongruent melting, potassium lithium niobate K3Li2−xNb5+xO15+2x (KLN, 0.15 < x < 0.5) crystals are difficult to grow by conventional methods such as Czochralski or TSSG. Using the laser heated pedestal growth technique, compositionally homogeneous a-axis oriented KLN single-crystal fibers free of macro-defects were successfully grown. The crystal length was between 10 and 40 mm for a diameter of about 500 μm. After etching, the fibers appeared to be mostly single domain, allowing blue laser light by second harmonic generation from an infrared laser emission.
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