Abstract
KTiOPO 4 single crystals of dimensions 34x15x15 mm 3 have successfully been grown by Top Seeded Solution Growth (TSSG), using phosphate flux (K 6 P 4 O 13 ), employing a home made vertical cylindrical three zone resistive heated furnace. Growth experiments were carried out with seed orientation. A method to grow inclusion free crystal with less dislocation density is proposed, by employing cooling rate of 0.5-2 K/day and rotation rate of 60-30 rpm. UV-VIS transmission studies were performed and the dependence of absorption coefficient with wavelength is discussed. SHG elements of dimension 8x7.5x7.5 mm 3 were fabricated and conversion efficiency of 58 % was achieved without antireflection coating. Nature of ionic conductivity and ferroelectric phase transition behavior of KTP crystals along the crystallographic polar axis in the frequency range of 100 Hz - 10 MHz are discussed.
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