Waveguide modulator structures

US10216059B2 · kind B2 · utility

Assignee

• Rockley Photonics Limited · GB

Inventors

• Guomin Yu · Glendora, US
• Aaron John Zilkie · Pasadena, US
• Hooman Abediasl · Los Angeles, US
• Damiana Lerose · Pasadena, US
• Amit Singh Nagra · Altadena, US
• Pradeep Srinivasan · Fremont, US
• Haydn Frederick Jones · Grafton, GB

Key dates

• Filing date: Mar 21, 2018
• Grant date: Feb 26, 2019
• Expiry date: Mar 21, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2202/10
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optoelectronic device and method of making the same. In some embodiments, the optoelectronic device includes a substrate, a Mach-Zehnder waveguide modulator, and an epitaxial crystalline cladding layer. The Mach-Zehnder waveguide modulator includes a left arm including a left SiGe optical waveguide, and a right arm including a right SiGe optical waveguide, each of the left and right optical waveguides including a junction region and a plurality of electrodes for providing a bias across the junction to enable control of the phase of light travelling through the junction regions via dispersion. The epitaxial crystalline cladding layer is on top of the substrate and beneath the junction region of the left optical waveguide and/or the junction region of the right optical waveguide, and has a refractive index which is less than a refractive index of the respective junction region(s), such that optical power is confined to the respective junction region(s).