Forschungsverbund Berlin E.v.

Ferdinand-Braun-Institut Ggmbh, Leibniz-Institut Fur Höchstfrequenztechnik

Andreas Klehr

Götz Erbert

Armin Liero

Thomas Hoffmann

Martin Maiwald

Bernd Sumpf

Heinar Schmidt

Günther Tränkle

Sven Schwertfeger

Martin Dr Maiwald

Martin Hofmann

The invention relates to an optical pulse generator comprising an active optical component adapted to emit optical radiation and electronic components of a means for electronically driving the optical component to excite the optical component to a pulsed emission of optical radiation, wherein the electronic components are arranged on a first side of a first submount, contact surfaces of the means for electronically driving are arranged on an opposite second side of the first submount, and the electronic components are connected to the contact surfaces of the means for electronically driving using electrically conductive vias in the first submount.

Optical pulse generator and method for operating an optical pulse generator

The invention discloses a device for selecting pulses comprising an optical waveguide for guiding the optical radiation along an axis; comprising a first electro-optical modulator designed to modulate the optical transparency of the waveguide; comprising a second electro-optical modulator designed to modulate the optical transparency of the waveguide, wherein the first modulator and the second modulator are arranged one after the other on the axis of the waveguide, and further comprising at least one control circuit designed to actuate the first modulator and the second modulator at offset times, and characterized in that a substrate of a semiconductive material is provided, the waveguide and the at least one control circuit are arranged on the substrate.

Device and method for selecting optical pulses

The present invention relates to a device and a method for selective transmission of an optical signal. It is an object of the present invention to provide a light modulator and a method for light modulation capable of selecting very short optical pulses of up to the femtosecond range with a low repetition frequency, wherein the repetition frequency can be variable in a range between several Hz up to the GHz range. To this end, the device has a first optical waveguide (), a first drive circuit (), a second optical waveguide () and a second drive circuit (), wherein the spacing between a switching element of the first drive circuit () and the first optical waveguide () is less than 3 mm, and the distance between a switching element of the second drive circuit () and the second optical waveguide () is less than 3 mm, and the first optical waveguide () has a first absorber section (), a pulse picker section () and a second absorber section ().

Device and method for selective transmission of an optical signal

The invention relates to a method and a device for producing and detecting a Raman spectrum. The problem addressed by the present invention is that of devising a method and a device for producing and detecting a Raman spectrum of a medium under investigation, whereby the Raman spectrum of a medium that is under investigation can be examined with a high degree of sensitivity while requiring relatively little equipment. The method is characterized by the coupling of excitation radiation into a medium () under investigation and the coupling of the electromagnetic radiation scattered by the medium () under investigation into a spectral optic system (), a laser diode () for generating excitation radiation with at least two different wavelengths (&#x3bb;, &#x3bb;) being controlled with at least two different excitation conditions and at least one Raman spectrum () being detected in each case from the scattered radiation at the different excitation wavelengths (&#x3bb;, &#x3bb;), and the Raman spectrum () of the medium () under investigation being determined from the at least two detected Raman spectra (), the two different excitation conditions for the laser diode () being adjusted by means of the electric current supplied to the laser diode ().

Method and device for producing and detecting a Raman spectrum

Growing community of inventors

Berlin, Germany

Andreas Klehr