Patent ID: 9557481
Date: 2017-01-31
CPC Classifications: G02B

Claim:
1. An optical waveguide, comprising: a laminated body comprising a core layer having a core portion, a first clad layer formed on one surface of the core layer, and a second clad layer formed on another surface of the core layer, and having a hollow section penetrating through the second clad layer and the core layer and extending to a middle portion of the first clad layer such that the laminated body has an inner wall surface defining the hollow section, wherein the inner wall surface includes an inclined plane which is inclined relative to and intersecting an interfacial plane between the core layer and the first clad layer, and the inner wall surface has a plurality of connection portions formed between the inclined plane and other portions of the inner wall surface such that each of the connection portions has a minimum radius of curvature in a range of 1 μm to 500 μm as measured at the interfacial plane.