Multi-mode interference waveguide based switch
US7035500B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Sep 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/217
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to device for space selective switching of an optical signal from an input access waveguide to a first selected output access waveguide. Said device comprising a multi-mode interference (MMI) waveguide having at a first side a number, N, of accesses for connection of access waveguides. Said MMI waveguide having a length, in light propagating direction, so that an image at the i:th, i≦N access waveguide propagating into said MMI waveguide will produce N self-images at a second side opposite to said first side, where N is an integer than 1. Said device further comprises reflective means located in said MMI waveguide close to said second side, arranged to reflect said N self-images towards said first side of said MMI waveguide, and means, arranged at said second side, for adjusting the phase of each of said self-images to create a single self-image at said selected output access waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.