The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2022
Filed:
Dec. 04, 2020
Dr. Johannes Heidenhain Gmbh, Traunreut, DE;
Wolfgang Holzapfel, Obing, DE;
Michael Kugler, Trostberg, DE;
Martin Roetzer, Traunreut, DE;
Marco Schade, Traunstein, DE;
DR. JOHANNES HEIDENHAIN GMBH, Traunreut, DE;
Abstract
A device includes a grating coupler with a grating constant, two light sources, and a planar waveguide, which are configured to couple light with two different wavelengths λ, λinto the waveguide. The waveguide has a waveguiding layer disposed adjacent to a substrate layer and a cover layer. The waveguiding layer has a thickness d and effective refractive indices of N(λ, j), wherein λis one of the wavelengths and jis an order of a waveguide mode, wherein the coupled light of the wavelength λhas a coupling angle αinto the waveguide, and wherein an amount of difference between the coupling angles is a divergence angle Δα. Guiding of waveguide modes of the order j>0 is possible for a wavelength of the coupled light. The waveguiding layer is arranged to couple the light via the grating coupler under a divergence angle of Δα<6.