Patent ID: 9335490
Filing Date: 2016-05-10
CPC Classification: G02B,G02F,H04B,Y10T

Claim Text:
1. An optical device comprising: a substrate having an electrooptical effect, and including an optical waveguide that guides light and a reflection groove having a bottom face that reflects light output from the optical waveguide; a light-receiving element positioned above the reflection groove and fixed to the substrate; and a reflection groove protecting projection formed around the reflection groove, wherein the light output from the optical waveguide into the reflection groove is reflected by the bottom face of the reflection groove while traveling through a space inside the reflection groove and is incident to the light-receiving element, the reflection groove protecting projection prevents adhesive that fixes the light-receiving element to the substrate from flowing into a part through which the light travels in the space inside the reflection groove, and the reflection groove protecting projection is between the substrate and the light-receiving element and in contact with the substrate and the light-receiving element such that a distance of the light-receiving element from the substrate is equal to a height of the reflection groove protecting projection.