Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Mannesmann Aktiengesellschaft

Werner Fuss

Walter Fabinski

Hermann Bucher

Michael Haisch

Peter Hering

Gerhard Wiegleb

Wolfram E Schmid

Kristian Hohla

A method and an apparatus for the selective determination of an isotope portion of a measuring gas by means of non-dispersive spectroscopy. The method includes sensitizing in a first ray path to the isotope component and sensitizing in a second ray path to the isotope-pure measuring gas, and electronically amplifying the measurement results. In order to improve the selectively and the sensitivity while maintaining a simple construction, an additional optical filtering is carried out in the first ray path by a filter filled essentially with isotope-pure measuring gas and the electronic measuring value of the second ray path is entered by influencing the amplification factor and an offset in the electronic amplification of the first ray path.

Non-dispersive infrared spectrometer

The present invention relates to a method and an apparatus for gerating pulsed laser radiation which contains components at several freely selectable wavelengths. Multi-wavelength emission is synchronized in time, propagates in a precise spatial overlap and has the same beam parameters on a common propagation direction. A preferred embodiment of an apparatus for a such method is a low pressure CO.sub.2 laser gas discharge in conjunction with a multi-wavelength resonator including a Q switch.

Method and apparatus for generating laser radiation having multiple

A gas containing an active iodine compound is circulated through a laser tube, a purifying device and a gas reconstitution device. The active compound is consumed by lasing in the laser tube, waste products of the lasing action are removed by the purifying device and the gas reconstitution device maintains the concentration of the active compound at an operational level.

Iodine gas laser device

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Garching, Germany

Werner Fuss