Non-linear optical thin film, non-linear optical device using the same, and optical switch using the same
US6804043B2 · kind B2 · utility
1Cited by
1References
10Claims
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Key dates
| Filing date | Mar 5, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Mar 5, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3551
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A non-linear optical material comprising crystal grains of an oxide having a corundum type crystal structure, and amorphous portions in the surroundings of the crystal grains, in a thin film, is disclosed. The non-linear optical thin film has such a property that its refractive index varies largely when energy is applied thereto. Since the material shows little loss of light transmitted therethrough, it is possible, by use of the material, to provide a non-linear optical device for efficiently changing over the emission path of a light signal or turning-ON/OFF the light signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.