Abstract: The invention describes a method for the manufacture of quartz glass that comprises not only doping with rare earth elements and/or transition metals, but also fluorination of the quartz glass. The method described presently allows the diffusion of the dopants during fluorination to be prevented. Moreover, the invention relates to the quartz glass that can be obtained according to the method according to the invention and the use thereof as laser-active quartz glass, for generating light-guiding structures, and in optical applications.

Abstract: A device for decoupling a supply voltage for HF amplifier circuits is described which includes an output line for coupling out an amplified signal, wherein one end of the output line, which is not used for coupling out signals, is connected to a circuit element designed as decoupling circuit. The circuit element has a low ohmic d.c. resistance and presents an HF-power absorption capacity that increases as the frequency increases, thus constituting a reflection-free termination for high frequencies. The circuit element is preferably constituted by several discrete subcircuits connected in succession. The device permits the operation of integrated distributed amplifiers of high performance at a low power loss caused by the decoupling circuit.

Abstract: The invention relates to a device for decoupling a supply voltage for HF amplifier circuits, comprising an output line for coupling out an amplified signal, wherein one end of the output line, which is not used for coupling out signals, is connected to a circuit element designed as decoupling circuit. The circuit element has a low ohmic d.c. resistance and presents an HF-power absorption capacity that increases as the frequency increases, thus constituting a reflection-free termination for high frequencies. The circuit element is preferably constituted by several discrete subcircuits connected in succession.