Electro-optic waveguide polarisation modulator and a method of modulation
US8682113B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2011 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | May 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optic waveguide polarization modulator includes cladding layers, and a waveguide core sandwiched between the cladding layers, wherein the waveguide core has a higher refractive index than the cladding layers. The modulator further includes primary electrodes arranged on the opposite side of one cladding layer to the core and a secondary electrode arranged on the opposite side of another cladding layer to the core. The electrodes are arranged to provide an electric field having field components in perpendicular directions within the waveguide core so as to modulate the refractive index such that electromagnetic radiation propagating through the core is converted from a first polarization state to a second polarization state. The modulator further includes a grading layer sandwiched between the cladding layers and the core, the grading layer having an effective refractive index intermediate between that of the waveguide core and the cladding layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.