Robert Boschgmbh

Ant Nachrichtentechnik Gmbh

Bernhard Schwaderer

Albrecht Kuke

Heiner Hauer

Roland Mueller-Fiedler

Eberhard Moess

Klaus-Michael Mayer

Wolf-Henning Rech

Reinhard Meschenmoser

Ulrich Kohn

Thomas Schwander

Werner Scholz

Wolfgang Ehrlinger

Martin Warth

Klaus Hirche

A device for generating microwave signals, e.g., for use in a distance and speed sensor in a motor vehicle, is provided. To this end, two laser sources are operated, whose emitted radiations are distinguished from each other by a set difference in wavelength. The two lasers are arranged in such a manner that the emitted laser beams overlap spatially. A photodiode is arranged in this region in which the two laser beams interfere. From the superimposition product of the two laser beams, this photodiode generates an electrical output signal that has the differential frequency of the two superimposed laser beams. In this context, the frequency difference of the two lasers is selected so that the frequency of the generated microwave radiation lies in the range of the radar beam to be generated.

Device for producing microwave signals

The optoelectronic receiver includes a device ( ) for taking in or collecting optical signals, an optical sensor ( ) for converting the optical signals into electronic signals; a coupling element ( ) for alignment of the optic axis of the device for taking in or collecting the optical signals on a sensitive surface of the optical sensor, a holder ( ) for the device ( ) for taking in the optical signals; a retaining device ( ) for the coupling element ( ); and a joint adjusting means ( ) for adjusting the holder ( ) for the device for taking in the optical signals and the retaining device ( ) for the coupling element. After adjustment using the joint adjusting means the holder and retaining device are fixed in position to form an aligned optoelectronic receiver. A method of making the aligned optoelectronic receiver is also described.

Optoelectronic receiver and method of making an aligned optoelectronic receiver

The device for generating an electrical control according to a position of a light beam in relation to a separating line includes two photodetectors (,), one (,) of which is arranged for detecting light falling on one side of the separating line and another (,) of which is arranged for detecting light falling on another side of the separating line. The separating line is an edge (,) extending between two (1,1,1) crystallographic planes of a crystalline substrate and the (1,1,1) crystallographic planes reflect respective parts of the light beam to the respective photodetectors.

Device for generating an electrical control signal according to the position of a light beam

In the case of the above devices, accurate adjustment is very important; the devices ought, however, to be very compact. It is not sufficient to utilize the silicon etching technique for accuracy. The optical transmitting element (LD) is located on a first holder (T1), and the optical receiving element (PD) and the transmission fiber (Fa) are located on a third holder. Provided there between is a second holder (T2) which is transparent to the wavelength of the light emitted by the transmitting element (LD). The holders are structured by means of anisotropic etching in order to render it possible to receive the individual components. Furthermore, the holders lie flat on one another and can be so adjusted. A monitor diode (MD) is provided.

Optical transmitting and receiving device having a surface-emitting laser

The invention relates to an optical fiber amplifier having an amplification waveguide, having a pump source and having a wavelength-selective coupler. The pump light from the pump source is coupled into the amplification waveguide via the coupler. A carrier substrate (GS) is provided, on which passive (eg. couplers, dividers) and active components (eg. amplification waveguides) of the fiber amplifier are integrated. In addition, a silicon carrier (ST1) is provided, which is fitted to one end of the carrier substrate (GS). The silicon carrier (ST1) has anisotropically etched grooves with optical components. The pump source is fixed on the silicon carrier (ST1). The optical components on silicon carrier (ST1) and carrier substrate (GS) are adjusted in relation to one another.

Optical fiber amplifier

In the case of the above devices, exact adjustment is very important; however, the devices ought to be very compact. It is not sufficient to utilize the silicon etching technique for the precision. The optical transmitting element (LD) is situated on a first carrier (T1), the optical receiving element (PD) and the transmission fiber (Fa) are situated on a third carrier. Provided in between them is a second carrier (T2) which is transparent to the wavelength of the light emitted by the transmitting element (LD). The carriers are structured by means of anisotropic etching in order to make possible the accommodation of the individual components. In addition, the carriers lie flat on one another and can thus be adjusted. A monitor diode (MD) is provided. Application of the arrangement in all transmission systems having optical waveguides.

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Weissach im Tal, Germany

Bernhard Schwaderer