Optical integrated circuit device
US6463188B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Mar 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to reduce the degree to which transmission loss occurs at the branching portion in a Y-branch structure provided at an optical integrated circuit device, the Y-branch structure through which a light signal input through an input waveguide is branched and transmitted into two output waveguides adopts the following features. The Y-branch structure is provided with a tapered waveguide having an input surface with a waveguide width a equal to the width of the input waveguide which is connected flush to the input waveguide and an output surface having a waveguide width W (>2a+g) is larger than a width 2a+g achieved by adding a width g of the gap between the output waveguides to a width 2a equal to the total of the widths of the two output waveguides each having a waveguide width a equal to the width of the input waveguide, which is connected with the two output waveguides via a stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.