Electrooptic polarization multiplexer/demultiplexer
US4711515A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1984 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | May 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrooptic polarization multiplexer/demultiplexer incorporates an electrooptic, directional coupler switch structure. The multiplexer/demultiplexer includes a substrate of birefringent, electrooptic material, a pair of phase matched, dielectric waveguides embedded in the substrate and spaced closely together over a distance L (the coupler or device length), a buffer layer of insulating material positioned over the substrate and the pair of electrodes, and a plurality of metallic electrodes positioned on the buffer layer in the vicinity of the waveguides. Electrodes are arranged in a multi-section, reversed .DELTA..beta. configuration. The distance L is selected such that 1.ltoreq.L/1.sub.TE .ltoreq.2 and L/1.sub.TM .ltoreq.0.5, where 1.sub.TE and 1.sub.TM are transfer lengths for the TE and TM modes, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.