Title:
OPTICAL WAVEGUIDE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2020/194800
Kind Code:
A1
Abstract:
An optical waveguide element that can reduce coupling loss at a part that is coupled to an optical fiber and that can reduce transmission loss at an optical waveguide. The optical waveguide element is characterized by comprising a support substrate and a waveguide layer that is laminated on the support substrate and comprises a material that has an electro-optical effect. The optical waveguide element is also characterized in that a rib part that is for forming an optical waveguide protrudes from an upper surface of the waveguide layer, a groove part is formed in an upper surface of the support substrate directly below a portion of the rib part, and the groove part is filled with a material that has about the same effective refractive index as the material of the waveguide layer.
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Inventors:
KATAOKA YU (JP)
MIYAZAKI NORIKAZU (JP)
MIYAZAKI NORIKAZU (JP)
Application Number:
PCT/JP2019/038181
Publication Date:
October 01, 2020
Filing Date:
September 27, 2019
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
International Classes:
G02F1/035; G02B6/12; G02B6/122; G02B6/30
Foreign References:
| JPH0415604A | 1992-01-21 | |||
| JPH06313817A | 1994-11-08 | |||
| JP2002350659A | 2002-12-04 | |||
| JP2005140822A | 2005-06-02 | |||
| US9547129B1 | 2017-01-17 |
Attorney, Agent or Firm:
ARIGA, Gunichiro et al. (JP)
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