POLARIZATION CONTROL METHOD FOR LITHIUM NIOBATE AND LITHIUM TANTALATE AND PRODUCTION OF OPTICAL WAVEGUIDE DEVICE BY THIS METHOD AND OPTICAL WAVEGUIDE DEVICE

PURPOSE:To obtain polarization inversion structures with good controllability by averting the surface contamination, change in refractive index, etc., of a substrate consisting of lithium niobate LN or lithium tantalate LT. CONSTITUTION:The polarization inversion structures 30 are formed by disposin...

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Hauptverfasser:	NADA NAOJI, YAMADA MASAHIRO, KAWAKUBO SHIN
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMISTRY CRYSTAL GROWTH DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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