Grating waveguide configuration for phasars
US6526202B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12014
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A grating is provided having a generally s-shaped waveguide configuration. The grating includes a plurality of waveguides arranged adjacent to one another to form an array. The array includes a first portion bending in a counter-clockwise direction, a second portion bending in a clockwise direction, and a third portion extending in a straight direction. The arc length of each waveguide along the counter-clockwise bend portion varies from one waveguide to the next. At its minimum, the arc length is nearly zero. The different arc lengths along the counter-clockwise bend cause some waveguides to be longer than others. This results in a clear separation of the individual waveguides. Further, the overall dimension of the grating is smaller than conventional devices which leads to reduced cross-talk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.