Grating-assisted vertical codirectional coupler having pair grating structure
US6101302A · kind A · utility
16Cited by
7References
5Claims
0Family size
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Key dates
| Filing date | Sep 10, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Sep 10, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/355
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an optical filter for selecting a wavelength to be used in an optical communication and optical switching equipment and, more particularly, to an optical filter in order to reduce a sidelobe deteriorating its characteristics. The optical filter according to the present invention includes a plurality of pair gratings formed in a cladding layer, wherein a period of the grating pairs is constant throughout the optical filter, wherein the pair gratings are divided into two unit gratings, and wherein intervals between unit grating within pair grating are spatially different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.