OPTICAL WAVEGUIDE AND ITS MANUFACTURING METHOD

• Main Authors: KUROTAKE HIROYUKI, MIZUUCHI KIMINORI
• Format: Patent
• Language: English
• Published: 14.09.2006
• Subjects: 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 ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To solve the problem that a conventional multi-layered optical waveguide is constituted by laminating resin materials and therefor can not use an optical crystal material with a large electrooptic constant. SOLUTION: An optical waveguide as an embodiment of the present invention is constituted by joining together a 1st substrate 101 and a 2nd substrate 102 which are optically polished, and equipped with a 1st waveguide 105 having a ridge 103 on the joined surface side of the 1st substrate and a 2nd waveguide 106 having a ridge 104 on the opposite surface side of the 1st substrate from the joined surface, and can use the optical crystal material with a large electrooptic constant and enables direct electric field application to the waveguides, thereby greatly improving a modulation speed, a modulation voltage, and size reduction as compared with a conventional structure. COPYRIGHT: (C)2006,JPO&NCIPI