Diffraction grating with reduced polarization-dependent loss
US6449096B1 · kind B1 · utility
12Cited by
7References
32Claims
0Family size
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Key dates
| Filing date | Jul 13, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Dec 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1809
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diffraction grating that achieves high diffraction efficiency at all polarizations for optical signals at telecommunications wavelengths is provided. The diffraction grating has a substrate and a plurality of reflective faces oriented at respective blaze angles &thgr;b spaced along the substrate surface, with the blaze angles substantially differ from the Littrow condition. Each reflective surface is supported by a support wall connected substantially with the substrate surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.