Stabilizing electro-absorption modulators (EAM's) performance by maintaining constant absorption with the use of integrated tap couplers
US6661556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Aug 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An exemplary monolithic stabilized monolithic transmissive active optical device, such as an electroabsorption modulator (EAM), a variable optical attenuator (VOA), or a semiconductor optical amplifier (SOA), with an output optical tap, includes: a substrate; a waveguide layer; a semiconductor layer. The waveguide layer is coupled to the substrate and includes an active medium, which interacts with a predetermined wavelength of light, and is responsive to an electric signal. The electric signal is applied between the substrate and the semiconductor layer. The waveguide layer includes an output optical tap section and an active section adjacent to the output optical tap section. These sections include portions of the active medium. Further embodiments of the present invention incorporate temperature as well as bias control to improve performance of exemplary monolithic transmissive active optical devices. Additional embodiments include exemplary methods of manufacture and methods of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.