Phase modulator for semiconductor waveguide
US6298177A · kind A · utility
106Cited by
9References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2000 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Mar 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical phase modulator comprises a semiconductor rib wave guide having P and N doped regions forming a PN junction along the path of the rib with terminals for applying a reverse bias to the junction to extend a carrier depletion zone to alter the refractive index, the PN junction is offset from the central axis of the rib but on application of the reverse bias the depletion zone extends over a central axis of the waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.