Semiconductor devices with curved waveguides and mode transformers
US7190852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2002 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Nov 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Semiconductor devices having various combinations of curved waveguides and mode transformers are described. According to some exemplary embodiments, the mode transformer itself can be fabricated as all or part of the curved waveguide. For these exemplary embodiments it can be beneficial to use mode transformers whose active regions are relatively small to minimize losses associated with the introduced curvature, e.g., mode transformers that employ resonantly coupled waveguides and a tapered active waveguide in the mode transformation region. According to other exemplary embodiments, the mode transformer can be disposed along a straight portion of the waveguide, e.g., between the curved portion of the waveguide and the back facet. The present invention also provides flexibility in manufacturing by permitting different types of devices to be generated from a wafer depending upon where the devices are cleaved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.