Novel seeding technique for growing KTiOPO4 single crystals by the TSSG method

A method is described for growing inclusion-free crystals of KTP using 〈0 1 0〉 seed orientation. The top seeded solution growth technique is employed, along with a high rotation rate for the seed crystal, using a five-zone resistive-heating furnace. A minimum wastage of the seed is achieved by maintaining the seed–liquid interface by surface tension forces. Elements fabricated from KTP crystals under Type II phase matching for second-harmonic generation from Nd:YAG radiation exhibited a conversion efficiency exceeding 60% (without anti-reflection coating). [Copyright &y& Elsevier]