Method of making an enhanced coupling strength grating having a cover layer
US10620378B2 · kind B2 · utility
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20References
38Claims
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Key dates
| Filing date | Jul 25, 2019 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Jul 25, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/187
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.