Optical coupling device for a photonic circuit

US10302870B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Karim Hassan · Auxerre, FR
• Salim Boutami · Grenoble, FR
• Sylvie Menezo · Voiron, FR

Key dates

• Filing date: Sep 25, 2018
• Grant date: May 28, 2019
• Expiry date: Sep 25, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12097
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A coupling device including, integrated in or on a substrate, a waveguide capable of guiding a light beam centered on a central wavelength λ0 and an optical coupler. The waveguide and the optical coupler extend in two superposed stages of the coupling device. The optical coupler is composed of at least one index gradient structure. The average optical index in the index gradient structure varies monotonously, decreasing with increasing distance from the waveguide, the average optical index being an average value of the optical index in a cubic volume with a side dimension equal to: in which neff is the effective index of guided mode in the waveguide.