Search International and National Patent Collections

1. (WO2013146818) LIGHT WAVEGUIDE STRUCTURE AND LIGHT WAVEGUIDE DEVICE

Pub. No.:    WO/2013/146818    International Application No.:    PCT/JP2013/058863
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Wed Mar 27 00:59:59 CET 2013
IPC: G02B 6/12
G02B 6/122
G02B 6/14
Applicants: NEC CORPORATION
日本電気株式会社
USHIDA Jun
牛田 淳
NAKAMURA Shigeru
中村 滋
Inventors: USHIDA Jun
牛田 淳
NAKAMURA Shigeru
中村 滋
Title: LIGHT WAVEGUIDE STRUCTURE AND LIGHT WAVEGUIDE DEVICE
Abstract:
Provided is a light waveguide structure, comprising a base waveguide which includes a taper part in which the width narrows contiguously from one end side toward another end side and a narrow-width part which is joined to the other end side of the taper part and extends from the other end side thereof. Three or more layers of upper part waveguides are layered upon the taper part. These upper part waveguides are configured such that planar shapes in two layers which are adjacent in the layering direction become progressively smaller from the taper parts such that the upper layer does not protrude beyond the lower layer and the thickness of the upper part waveguides progressively increases in the layering direction. A plan view approximate wedge part is provided in which the width becomes contiguously narrower toward the other end side in at least the other end side of each upper part waveguide, and the base waveguide and the end face of the one end side of each upper part waveguide are flush.