Forschungsverbund Berlin E.v.

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

Leibniz-Institut Fur Photonische Technologien E.v.

Leibniz-Institut Für Astrophysik Potsdam (Aip)

Martin Maiwald

Bernd Sumpf

Heinar Schmidt

Andreas Klehr

Christian Fiebig

Katrin Paschke

Daniel Pérez Kaiser

Elmar Schmälzlin

Alexander Sahm

Florian Korinth

André Müller

Christoph Krafft

Martin Roth

Clara Stiebing

Benito Moralejo

Karin Paschke

Raman spectroscopy methods and devices are disclosed. The method includes irradiation of excitation radiation onto a sample to be examined. The sample is irradiated with a first excitation radiation of a first excitation wavelength and a different second excitation radiation of a second excitation wavelength. The first excitation radiation scattered by the sample is wavelength-selective filtered by means of a passive filter element. A transmitted filter wavelength of the filter element differs from at least the first excitation wavelength and the second excitation wavelength. A first intensity is determined through a single-channel detector assigned to the filter wavelength from the first excitation radiation scattered and filtered by the sample. Additionally, the filter element wavelength-selective filters the second excitation radiation scattered by the sample. A second intensity is determined through the single-channel detector assigned to the filter wavelength from the second excitation radiation scattered and filtered by the sample.

Method and device for raman spectroscopy

Optical systems and methods for spectroscopy are described. The optical system may be particularly suitable for Raman spectroscopy and includes a multispectral excitation source, designed to emit monochromatic excitation radiation successively at at least two different excitation wavelengths along a common beam axis; an elongated flow volume with a longitudinal axis, designed to direct a particle flow along the longitudinal axis; an excitation beam path, designed to irradiate the monochromatic excitation radiation into the flow volume at a first position and the second position that are located in the flow volume and the first position is spaced apart from the second position; and a detection device, designed to wavelength-selectively filter and detect a portion of a radiation scattered from the first position at a first filter wavelength and to wavelength-selectively filter and detect a portion of a radiation scattered from the second position at a second filter wavelength.

Optical system and method for spectroscopy

A device () is described having an arrangement of optical elements comprising excitation light sources () for generating individual light beams () having different wavelengths for exciting a sample in such a way that light scattered back from the sample as a result of the excitation is made available to a Raman spectroscopic analysis. The device () has deflection devices () associated with the individual light beams () for deflecting the individual light beams () onto a common light path, wherein the common light path has a same optical system () for focusing the light beams ().

Device having an arrangement of optical elements

The invention relates to an optical bank () comprising a carrier () for receiving optical components () and a crystal () that is mechanically connected to the carrier, for changing the frequency of the light irradiated into the crystal () from a light source (). Two rails () are arranged essentially in parallel on the carrier (). The crystal () and the carrier () are mechanically connected by a surface of the rails (), facing away from the carrier (). A heat conducting element () is arranged on the crystal, said heat conducting element being applied to the surfaces of the rails (), that face away from the carrier ().

Optical bank and method for producing the optical bank

A method and a device for generating and for detecting a Raman spectrum enables an automated, or automatable, and at the same time quantitative SERD spectroscopy (for example concentration measurement series). To this end, during the SERD spectroscopy, a first spectrum and a second spectrum are standardized in relation to one another in terms of intensity values and a first difference spectrum is subsequently calculated, a second difference spectrum is calculated, the first difference spectrum is converted into a first transformation spectrum, the second difference spectrum is converted into a second transformation spectrum, and the Raman spectrum is calculated by adding the first transformation spectrum and the second transformation spectrum.

Method for generating and for detecting a Raman spectrum

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

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Berlin, Germany

Martin Maiwald