Abstract: The invention relates to a support element (1), for mounting at least two wave-modifying elements, with support of services, arranged parallel to each other. According to the invention, support element for mounting at least two wave-modifying elements and corresponding production method maybe achieved, whereby the support surfaces each have at least one opening and the openings are connected to each other by means of at least one through drilling.

Abstract: The invention relates to a support element (1), for mounting at least two wave-modifying elements, with support of services, arranged parallel to each other. According to the invention, support element for mounting at least two wave-modifying elements and corresponding production method maybe achieved, whereby the support surfaces each have at least one opening and the openings are connected to each other by means of at least one through drilling.

Abstract: A method and apparatus for splitting a beam of electromagnetic waves comprising several wavelength components into a plurality of separate beams of discrete wavelengths (demultiplexing) comprises means for coupling and decoupling the beams and at least one filter impinged upon the beams at different angles of incidence. One objective is to provide devices for multiplexing and demultiplexing optical signals which can be produced economically and that require little space for greater suitability in microelectronics.

Abstract: The invention relates to a method for manufacturing an aluminum tube, an aluminum tube for further processing in at least one subsequent deformation process, as well as the use of the aluminum tube. The object of providing a simple method for manufacturing an aluminum tube with elevated deformation potential is solved by texturing the outer surface of the aluminum tube using temper rolls. The application of a texture using temper rolls yields a sufficiently high roughness on the surface of the aluminum tube on the one hand, so that the strain can be increased in subsequent deformation processes. On the other hand, while the roughening of the surface can be integrated into existing manufacturing processes, e.g., for straight bead welded or extruded aluminum tubes a swift and easy manufacture of the semi-finished product is enabled.