OPTICAL WAVEGUIDE ELEMENT

• Main Authors: JINRIKI TAKASHI, ICHIOKA MASAYUKI, FUJINO TETSUYA
• Format: Patent
• Language: English
• Published: 19.04.2012
• 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 provide an optical waveguide element capable of suppressing degradation in optical characteristics of signal light that propagates in a main substrate made into a thin plate and improving optical characteristics of the product.SOLUTION: The optical waveguide element comprises: an optical waveguide substrate comprising a substrate having an electro-optic effect and a thickness of 30 μm or less and an optical waveguide formed therein; and a reinforcing substrate joined with an adhesive layer to the optical waveguide substrate. A buffer layer is formed on a face in the reinforcing substrate side of the optical waveguide substrate, in a portion where the optical waveguide is formed, and further a light-absorbing film is formed so as to cover the buffer layer, in the reinforcing substrate side of the optical waveguide substrate.