Optical device
US7526161B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2007 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jul 11, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device is disclosed which suppresses a bias shift which is a deviation of a phase relationship between output signal light and monitoring light. The optical device includes a substrate having an electro-optic effect, a modulating optical waveguide formed on a surface layer portion of the substrate and forming an interference optical modulator for modulating input light, and an output optical waveguide and a monitoring optical waveguide each formed on the surface layer portion of the substrate and branched from and connected to a downstream side portion of the modulating optical waveguide. The monitoring optical waveguide guides light for monitoring optical modulation operation of the modulating optical waveguide. The monitoring optical waveguide has a reduced width region which has a reduced waveguide width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.