Abstract: The invention relates to an antenna device having at least one antenna element. The antenna element is implemented so as to emit electromagnetic radiation in a beam direction advantageously at frequencies in the GHz range and/or receive same from a beam direction. In addition, the antenna element is arranged on a carrier element which is arranged relative to a holding element. In addition, the carrier element is movable relative to the holding element.

Abstract: The invention relates to an antenna device having at least one antenna element. The antenna element is implemented so as to emit electromagnetic radiation in a beam direction advantageously at frequencies in the GHz range and/or receive same from a beam direction. In addition, the antenna element is arranged on a carrier element which is arranged relative to a holding element. In addition, the carrier element is movable relative to the holding element.

Abstract: The invention relates to an arrangement for operating an optical transmission or reception module at high data rates of up to 10 Gbit/s, having a TO package with electrical connections, an optical transmission or reception module arranged in the TO package, and a circuit board for making electrical contact with the electrical connections of the TO package. According to the invention, the circuit board (6) has RF lines (81, 82) and the electrical connections (41, 42) are connected to the RF lines (81, 82) in an arrangement parallel to the plane of the board. Preferably, provision is also made for an RF matching circuit to be produced on the board and for SMD components to be fitted directly and without further solder pads onto planar RF lines on the RF board. The cited measures serve to improve the RF properties of a TO module.

Abstract: The invention relates to an arrangement for operating an optical transmission or reception module at high data rates of up to 10 Gbit/s, having a TO package with electrical connections, an optical transmission or reception module arranged in the TO package, and a circuit board for making electrical contact with the electrical connections of the TO package. According to the invention, the circuit board (6) has RF lines (81, 82) and the electrical connections (41, 42) are connected to the RF lines (81, 82) in an arrangement parallel to the plane of the board. Preferably, provision is also made for an RF matching circuit to be produced on the board and for SMD components to be fitted directly and without further solder pads onto planar RF lines on the RF board. The cited measures serve to improve the RF properties of a TO module.

Abstract: A stabilization of the frequency spacing between the carrier frequency channels of the individual transmitters and the elimination of the risk of the channel crosstalk is obtained for an arbitrarily large number of transmitters in a coherent optical multi-channel arrangement which has a plurality of transmitters arranged in a group, a single coherent optical heterodyne arrangement for heterodyning a portion of the output of each of the transmitters with respective reference frequency lines and a control arrangement for controlling the channel carrier frequency of each of the transmitters by utilizing the heterodyne signal.

Abstract: For reducing power fluctuations of spectral lines of a comb generator having an annularly closed waveguide, a coupler for coupling light from a separate light source into the waveguide and out of the waveguide and also a sideband modulator, the light circulating in the waveguide can be either separately modulated or the sideband modulator can be operated to have only sidebands of the same operational sign of a frequency shift or with an amount being selected according to a particular arrangement, or can have both positive and negative frequency shifts with the amount being selected by a different formula or the length of the annularly closed waveguide can be dimensioned so that the size of the round-trip time of the light circulating in the waveguide is longer than the defined coherent time of the reference laser light. It is also possible to incorporate various combinations of these alternative ways of reducing the power fluctation.

Abstract: An apparatus for generating an FSK-modulated optical signal has an optical two-filter FSK super-heterodyne receiver. The optical signal has two different polarization conditions that are orthogonal to one another. Due to the two-filter receiver and orthogonal conditions, polarization-independent reception is possible. Conversion of the polarized, optical signal into the optical signal having the orthogonal polarization conditions is accomplished by a switching device. Each condition has a corresponding bit status of a data signal. The data signal effectively controls the polarizatiion of the optical signal. Hence, the frequency boost can be freely selected while maintaining excellent bandwidth characteristics and optimum sensitivity.

Abstract: A method for generating an FSK-modulated optical signal with an optical two-filter FSK super-heterodyne receiver. The optical signal has two different polarization conditions that are orthogonal to one another. Due to orthogonal conditions, polarization-independent reception is possible. Synchronized polarization shifting occurs to generate a polarized modulated optical signal having alternating orthogonal polarization conditions. A delay stage for delaying the switching signal by one-half a clock period ensures accurate synchronization. The frequency shift of the FSK-modulated signal can be freely selected while maintaining excellent bandwidth characteristics and optimum sensitivity.

Abstract: A method for frequency stabilization of a semiconductor laser having a coupled, external ring resonator, which stabilizes the emission frequency of the semiconductor utilizes a stabilizing of the free spectral range and the resonant frequencies of the ring resonator in order to correct for changes due to temperature fluctuations. To accomplish this, a shift in resonant frequency from a predetermined value and a shift in the free spectral range from a rated value is compensated by utilizing a phase modulator to act on the resonator to shift the frequencies back to the predetermined frequencies.