OPTICAL MODULATOR AND COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To provide a small-sized and highly efficient optical modulator which can be incorporated in a communication system and the like. SOLUTION: The optical modulator has an optical waveguide 2 extending along a certain surface, a first optical guide part (the array of pits 9) regul...

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Bibliographische Detailangaben
Hauptverfasser:	ENOHARA AKIRA, FURUYA HIROYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a small-sized and highly efficient optical modulator which can be incorporated in a communication system and the like. SOLUTION: The optical modulator has an optical waveguide 2 extending along a certain surface, a first optical guide part (the array of pits 9) regulating propagation of an optical wave in a direction parallel to the surface and a second optical guide part (a part other than a high refractive index layer 11 in a substrate 1) regulating the propagation of the optical wave in a direction vertical to the surface. The first optical guide part has a photonic crystal disposed at the external part of the optical waveguide 2, the second optical guide part has a region having a refractive index lower than that of the optical waveguide 2, and both the first and the second optical guide parts are provided in the substrate formed of a material exhibiting an electrooptical effect. COPYRIGHT: (C)2005,JPO&NCIPI