Dr. Johannes Heidenhain Gmbh

Michael Kugler

Wolfgang Holzapfel

Michael Hermann

Marco Schade

Martin Roetzer

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 &#x3bb;, &#x3bb;into 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(&#x3bb;, j), wherein &#x3bb;is one of the wavelengths and jis an order of a waveguide mode, wherein the coupled light of the wavelength &#x3bb;has a coupling angle &#x3b1;into the waveguide, and wherein an amount of difference between the coupling angles is a divergence angle &#x394;&#x3b1;. Guiding of waveguide modes of the order j&#x3e;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 &#x394;&#x3b1;&#x3c;6.

Growing community of inventors

Trostberg, Germany

Michael Kugler