MMI based device
US7349628B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2002 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Apr 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device and method for multiplexing or demultiplexing M optical signals, each having a different wavelength λm. An MMI waveguide has a length such that each optical signal that propagates into the MMI waveguide at an i:th access waveguide, where i≦N, and N is greater than or equal to 2, produces N self-images inside the MMI waveguide at a respective distance Im from the access waveguides. Each of M wavelength selective reflectors is arranged near a respective distance Im, wherein the m:th reflector reflects the optical signal carried by the m:th wavelength, where 2≦m≦M, while being substantially transparent to all other wavelengths. Each of M phase adjustors is arranged relative to a corresponding reflector, wherein the m:th phase adjustor adjusts the phase of the self-images of the optical signal carried by the m:th wavelength to create a single self-image at a selected output access waveguide when reflected by the m:th reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.