A circuit assembly, comprising - at least one first and one second electronic circuit (11, 12); - at least one optical waveguide (14, 14a, 14b), wherein the core (141, 141a, 141b) and the cladding of the optical waveguide (14, 14a, 14b) are formed from an amorphous material; - at least one carrier on which the at least one optical waveguide (14, 14a, 14b) is arranged; and - at least one first electro-optically active material layer (151, 151', 151", 151a, 151b) electrically connected with the first electronic circuit, which is configured to convert an electrical signal received from the first electronic circuit via a first electrical contact (111a, 111b) into an optical signal propagating in the at least one optical waveguide (14, 14a, 14b) and at least one second electro-optically active material layer (161, 161', 161") electrically connected with the second electronic circuit, which is configured to convert an optical signal generated by the first electro-optically active material layer (151, 151', 151", 151a, 151b) and propagating in the at least one optical waveguide (14, 14a, 14b) into an electrical signal to be conducted to the second electronic circuit via a second electrical contact (121a, 121b), wherein - the electrical connections between the electronic circuits (11, 12) and the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") are produced in that the electrical contacts (111a, 111b, 121a, 121b) each extend from the electronic circuits (11, 12) through at least one section of the cladding of the at least one optical waveguide (14, 14a, 14b) to the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") or are connected to a section of the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161"), which protrudes from the cladding of the at least one optical waveguide (14, 14a, 14b), and - the electronic circuits (11, 12) are arranged on the at least one carrier, and wherein - the electronic circuits (11, 12) are arranged on one side of the carrier and the at least one optical waveguide (14, 14a, 14b) is arranged on the other side of the at least one carrier, wherein - the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") at least partly extend in the at least one optical waveguide (14, 14a, 14b), characterized in that the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") at least partly extend in the core (141, 141a, 141b) of the at least one optical waveguide (14, 14a, 14b) or adjacently extend on the side of the core (141, 141a, 141b) of the at least one optical waveguide (14, 14a, 14b) facing the carrier. - at least one first and one second electronic circuit (11, 12); - at least one optical waveguide (14, 14a, 14b), wherein the core (141, 141a, 141b) and the cladding of the optical waveguide (14, 14a, 14b) are formed from an amorphous material; - at least one carrier on which the at least one optical waveguide (14, 14a, 14b) is arranged; and - at least one first electro-optically active material layer (151, 151', 151", 151a, 151b) electrically connected with the first electronic circuit, which is configured to convert an electrical signal received from the first electronic circuit via a first electrical contact (111a, 111b) into an optical signal propagating in the at least one optical waveguide (14, 14a, 14b) and at least one second electro-optically active material layer (161, 161', 161") electrically connected with the second electronic circuit, which is configured to convert an optical signal generated by the first electro-optically active material layer (151, 151', 151", 151a, 151b) and propagating in the at least one optical waveguide (14, 14a, 14b) into an electrical signal to be conducted to the second electronic circuit via a second electrical contact (121a, 121b), wherein - the electrical connections between the electronic circuits (11, 12) and the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") are produced in that the electrical contacts (111a, 111b, 121a, 121b) each extend from the electronic circuits (11, 12) through at least one section of the cladding of the at least one optical waveguide (14, 14a, 14b) to the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") or are connected to a section of the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161"), which protrudes from the cladding of the at least one optical waveguide (14, 14a, 14b), and - the electronic circuits (11, 12) are arranged on the at least one carrier, and wherein - the electronic circuits (11, 12) are arranged on one side of the carrier and the at least one optical waveguide (14, 14a, 14b) is arranged on the other side of the at least one carrier, wherein - the electro-optically active material layers (151, 151', 151", 151a, 151b, 161, 161', 161") at least partly extend in the at least one optical waveguide (14, 14a, 14b),