Optical waveguide circuit including passive optical waveguide device combined with active optical waveguide device, and method for making same
US6898352B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2002 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Jul 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical waveguide device includes an active optical waveguide device and a passive optical waveguide device. The active optical waveguide device is formed at least in part on a semiconductor layer and includes an electrode portion. A region of altered effective mode index is created by the active optical waveguide device and controlled by application of an electric voltage to the electrode portion in a manner that alters a free carrier density of the region of altered effective mode index. Changing the electric voltage to the electrode portion changes the effective mode index in the region of altered effective mode index. The passive optical waveguide device is formed at least in part from a polysilicon layer deposited on the semiconductor layer. An effective mode index of a region of static effective mode index within the optical waveguide is created by the polysilicon layer of the passive optical waveguide device. The value and position of the effective mode index within the region of static effective mode index remains substantially unchanged over time. The optical waveguide couples the active optical waveguide device and the passive optical waveguide device, and the optical …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.