Planar optical waveguide and method of spatially selectively increasing the refractive index in a glass
US6226433A · kind A · utility
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6References
6Claims
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Key dates
| Filing date | Oct 25, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Oct 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a method for spatially selectively increasing the refractive index in a glass layer which has been produced by flame hydrolysis deposition of a hydrolytic glass initial product on a base and subsequent sintering of the glass initial product, no measures are taken to increase the photosensitivity. Instead, heat is supplied where the refractive index of the glass is to be increased. It has been shown that this results in a densification of the sintered glass accompanied by an increase in the refractive index. The chemical composition of the thus treated regions is the same as that of the untreated regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.