Rofin-sinar Laser Gmbh

Florian Engel

Gongxue Hua

Peter Rosenthal

Hermann Hage

Volker Scholz

Jens Schüttler

Stefan Ruppik

Peter Andrew Rosenthal

A COlaser that generates laser-radiation in just one emission band of a COgas-mixture has resonator mirrors that form an unstable resonator and at least one spectrally-selective element located on the optical axis of the resonator. The spectrally-selective element may be in the form of one or more protruding or recessed surfaces. Spectral-selectivity is enhanced by forming a stable resonator along the optical axis that includes the spectrally-selective element. The COlaser is tunable between emission bands by translating the spectrally-selective element along the optical axis.

Wavelength discriminating slab laser

In a slab laser, a gas mixture containing carbon dioxide COis formed as a laser-active medium in a discharge space which is formed between two plate-shaped metal electrodes, the flat faces of which are located opposite one another. A resonator mirror is arranged on each of the mutually opposite end faces of the discharge space, the mirrors forming an unstable resonator parallel to the flat faces. At least one of the mutually facing flat faces is provided either on the entire flat face with a dielectric layer the thickness of which is greater on at least one sub-surface than in the remaining area of the flat face, or the at least one flat face is provided with a dielectric layer exclusively on at least one sub-surface.

Slab laser

In a stripline laser, a gas mixture containing carbon dioxide is situated as a laser-active medium between two plate-type electrodes lying with their flat sides opposite one another. The electrodes define a discharge space, at whose end sides lying opposite one another a resonator mirror is respectively arranged. The resonator mirrors form an unstable resonator. To operate the stripline laser in the 9.3 &#x3bc;m band and/or in the 9.6 &#x3bc;m band, the electrodes are provided with a passivation layer on their flat sides. The passivation layer, of at least one electrode, contains silicon dioxide in a region covering a partial area of a flat side. A distance between the electrodes is set such that the attenuation of laser beams in the 10.3 &#x3bc;m band and in the 10.6 &#x3bc;m band is greater than the attenuation of laser beams in the 9.3 &#x3bc;m band and/or in the 9.6 &#x3bc;m band.

Stripline laser

Growing community of inventors

Hamburg, Germany

Florian Engel