Grote, NorbertNorbertGroteZhang, ZiyangZiyangZhangSoares, FranciscoFranciscoSoaresGenrich, GarriGarriGenrich2022-03-082022-03-082014https://publica.fraunhofer.de/handle/publica/310115The invention relates to a directional coupler, comprising - a first and a second optical waveguide extending at least partially parallel to one another, wherein - the first and/or the second optical waveguide has a polymer cladding and a core that at least partially comprises or consists of a dielectric material. The invention also relates to an optical waveguide.en621patent2696227