Resonantly coupled waveguides using a taper

US6310995A · kind A · utility

Assignee

• University of Maryland · US

Inventors

• Simarjeet Saini · Columbia, US
• Vijayanand Vusirikala · Palo Alto, US
• Peter Heim · Washington, US
• Robert Ernest Bartolo · Greenbelt, US
• Mario Dagenais · Wellesley, US

Key dates

• Filing date: Nov 23, 1999
• Grant date: Oct 30, 2001
• Expiry date: Nov 23, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12147
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A resonant coupler has a coupling region having first and second ends, a coupling length, and a tapered variable width, such that a phase matching condition for the waveguide is met within the coupling length. In an exemplary embodiment the first and second ends each have a corresponding variable width which varies at a rate greater than the variable width of the coupling length. In yet another embodiment the coupling region has an electrically sensitive phase matching characteristic and an electrode in operative relation with the coupling region for varying the phase matching characteristic.