Device for reflecting light
US6421482B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2813
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for reflecting light waves to used when building optical systems for various applications and special devices, is built on a substrate and has a planar structure. It comprises a light power coupler of the MMI-type, configured as a rectangular plate at or in the surface of the substrate. The coupler splits light incoming on an input terminal into two equal portions, each portion delivered on an output terminal. Also the coupler combines light incoming on two output terminals into combined light delivered on the input terminal. A loop is connected to the two output terminals for conducting light delivered on each one of these output terminals back into the other one of these output terminals. The loop is a planar waveguide built on the substrate, connected to an edge surface of the coupler. The loop has an outer contour comprising a multitude of linear segments and it can also have an inner contour having a polygon shape. The shape of the loop can be formed by folding a strip having a uniform width at least twice, the folds being symmetrically made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.