Waveguide coupling into photonic crystal waveguides

US7072547B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• Solomon Assefa · Ossining, US
• Peter Bienstman · Wondelgem, BE
• Gale S. Petrich · Arlington, US
• Alexei A. Erchak · Cambridge, US
• Steven G. Johnson · McLeansboro, US
• Leslie Kolodziejski · Belmont, US
• John D. Joannopoulos · Belmont, US

Key dates

• Filing date: Jun 18, 2003
• Grant date: Jul 4, 2006
• Expiry date: Aug 29, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/1228
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A coupling element includes a first stage having a dielectric waveguide that is transitioned to a waveguide having a sequence of resonators with a fixed period. A second stage transitions the waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of the photonic crystal to the waveguide.