Periodic electric field poled crystal waveguides
US5875053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3775
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Several embodiments are described for induced electric field or E-field poling of QPM nonlinear crystal materials, such as LiNbO.sub.3, LiTaO.sub.3 and KTP, utilizing approaches which, for the most part, avoid the necessity of depositing or otherwise forming a series of spatially disposed conductive electrodes on one surface of the nonlinear crystal material. E-field poling is accomplished by applying a high voltage electric field in excess, for example, in the range of several kilovolts per cm to several 100 kilovolts per centimeter, at room temperature to provide inverted domains in a pattern of continuously alternating domains corresponding to the regions formed on the first z surface of the crystal. The employment of single, planar-applied liquid electrodes is preferred eliminating any necessity of forming and removing previously formed metal electrodes in the poling process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.