Coupling device with compensated birefringence

US7881571B2 · kind B2 · utility

Assignee

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

Inventors

• Badhise Ben Bakir · Brézins, FR
• Alexei Tchelnokov · Meylan, FR

Key dates

• Filing date: Jun 25, 2009
• Grant date: Feb 1, 2011
• Expiry date: Jul 22, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/34
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to a coupling device comprising a support substrate; a first layer arranged on the support substrate and comprising first patterns produced within the thickness of said first layer, said first patterns being arranged in parallel and periodic rows; a second layer arranged on the first layer and comprising second patterns passing through the thickness of said second layer, said second patterns being arranged in parallel and periodic rows. The direction of periodicity of the rows of the first patterns is perpendicular to the direction of periodicity of the rows of the second patterns. The rows of the first patterns extend over a distance greater than or equal to the wavelength in the void of the optical wave intended to be coupled. The first patterns have a width less than or equal to a tenth of the wavelength of the optical wave intended to be coupled, and the period of these patterns is between 50 nm and 1 μm. The second patterns are arranged so as to form a periodic diffraction grating.