Optical waveguide devices and methods of fabricating the same
US6477308B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2001 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | May 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention concerns an optical waveguide device having a structure for effectively suppressing variation in optical characteristics due to temperature change without causing increase in device size, and a fabrication method thereof. The optical waveguide device has a structure in which a first main member having a positive coefficient of linear expansion is fixed to a sub member having a negative coefficient of linear expansion. The first main member is provided with an undercladding, a core functioning as an optical waveguide provided on a plane of the undercladding, and an overcladding provided so as to cover the core between the undercladding and the overcladding. The first main member is made, for example, of a silica glass or silicon based material and the core is doped with a dopant for increasing the refractive index. While covering the whole of at least one major surface of the first main member, the sub member is fixed to the major surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.