公开(公告)号：US20190204503A1

公开(公告)日：2019-07-04

申请号：US16292375

申请日：2019-03-05

Applicant: AGC Inc.

Inventor： Seiki OHARA ,  Shotaro TAKENOBU

IPC: G02B6/02 ,  G02B6/26 ,  G02B6/122

Abstract: The present invention relates to a resin optical waveguide including a core and a cladding having a refractive index lower than that of the core, in which the resin optical waveguide includes, along a light propagation direction, a coupling part at which at least a part of the core is exposed and an optical waveguide part where the whole circumference of the core is covered with the cladding, and the core has a width Wb at an end part of the coupling part at a side of the optical waveguide part being larger than a width Wa of the core at an end part of the coupling part at a side opposite to the optical waveguide part.

公开(公告)号：US20190025519A1

公开(公告)日：2019-01-24

申请号：US16131851

申请日：2018-09-14

Applicant: AGC INC.

Inventor： Toshihisa OKADA ,  Seiki OHARA ,  Shotaro TAKENOBU ,  Satoko NOMA

IPC: G02B6/30 ,  G02B6/138 ,  G02B6/122

CPC classification number: G02B6/30 ,  G02B6/12 ,  G02B6/1223 ,  G02B6/138 ,  G02B6/26

Abstract: The present invention relates to a composite optical waveguide (1) containing a polymer optical waveguide and a silicon optical waveguide adiabatically coupled to each other, in which the polymer optical waveguide and the silicon optical waveguide are coupled to each other by an adhesive layer in an adiabatic-coupling portion where a core of the polymer optical waveguide and a core of the silicon optical waveguide are disposed to face each other, the adhesive layer is formed by using a photocurable adhesive having a glass transition point Tg being 125° C. or higher after curing, and the adiabatic-coupling portion includes a region in which a spacing t between the core of the polymer optical waveguide and the silicon optical waveguide is 1.5 μm or less.