PRODUCTION OF KTP SINGLE CRYSTAL AND OPTICAL WAVEGUIDE

摘要

PURPOSE: To produce a large-sized KTiOPO₄ single crystal useful as a light- modulating element and with the (100) plane developed in a relatively short time and produce an optical waveguide with the single crystal as a substrate. ;CONSTITUTION: A seed crystal of KTiOPO₄ is brought into contact with a flux consisting of 45-65mol% K₂O, 25-32mol% P₂O₅ and 10-30mol% (TiO₂)₂, the flux is cooled to grow the (100) plane of the KTiOPO₄ crystal preferentially, and a KTiOPO₄ single crystal is produced. A substrate having the (100) plane of the single crystal is formed, the (100) plane of the substrate is brought into contact with a flux contg. a dopant M, potassium, titanium, phosphorus and oxygen to epitaxially grow the single crystal thin film of K_1-xM_xTiOPO₄ (where M is an element or group to make the refractive index of the thin film higher than that of KTiOPO₄), and an optical waveguide is produced.;COPYRIGHT: (C)1994,JPO