Danmarks Tekniske Universitet

Ole Bjarlin Jensen

Paul Michael Petersen

Peter Eskil Andersen

Birgitte Thestrup Nielsen

Anders Kragh Hansen

André Müller

The present invention relates to an apparatus comprising a diode laser () providing radiation in a first wavelength interval, a radiation conversion unit () having an input and an output, the radiation converter configured to receive the radiation in the first wavelength interval from the diode laser at the input, the radiation conversion unit configured to convert the radiation in the first wavelength interval to radiation in a second wavelength interval and the output configured to output the converted radiation, the second wavelength interval having one endpoint outside the first wavelength interval. Further, the invention relates to a method of optically pumping a target laser () in a laser system, the laser system comprising a laser source providing radiation at a first frequency, the laser source being optically connected to an input of a frequency converter, the frequency converter configured to convert the radiation at the first frequency to a second, different frequency, the target laser arranged in optical communication with an output of the frequency converter, the method comprising the steps of emitting radiation from the laser source, receiving the radiation at the frequency converter, converting the radiation from the first frequency to the second frequency in the frequency converter, and providing the radiation at the second frequency at the target laser so that the target laser is optically pumped.

Laser system with wavelength converter

A laser apparatus generating frequency converted light. Embodiments of the laser apparatus described herein apply a cascade of nonlinear frequency mixer for sum frequency generation (SFG) or difference frequency generation (DFG) between two frequency components of a spectrally combined laser beam with at least two spectral components originating from two respective laser sources, SFG of two frequency components beams offers up to a factor of four amplification of output power over SHG of a single laser beam.

Laser apparatus with cascade of nonlinear frequency mixers

The present invention relates to an apparatus comprising a diode laser () providing radiation in a first wavelength interval, a radiation conversion unit () having an input and an output, the radiation converter configured to receive the radiation in the first wavelength interval from the diode laser at the input, the radiation conversion unit configured to convert the radiation in the first wavelength interval to radiation in a second wavelength interval and the output configured to output the converted radiation, the second wavelength interval having one end point outside the first wavelength interval. Further, the invention relates to a method of optically pumping a target laser () in a laser system, the laser system comprising a laser source providing radiation at a first frequency, the laser source being optically connected to an input of a frequency converter, the frequency converter configured to convert the radiation at the first frequency to a second, different frequency, the target laser arranged in optical communication with an output of the frequency converter, the method comprising the steps of emitting radiation from the laser source, receiving the radiation at the frequency converter, converting the radiation from the first frequency to the second frequency in the frequency converter, and providing the radiation at the second frequency at the target laser so that the target laser is optically pumped.

Disclosed is a laser system comprising: A laser assembly () comprising a plurality of emitters; first and second light feedback devices () forming respective external cavities with the laser assembly; a dispersive device () for redirecting respective portions of the light from the laser assembly to the first and second feedback devices (), wherein the first feedback device () is adapted to reflect a feedback portion of the redirected beam back onto the dispersive device () and to generate the output beam () from an output part of the first redirected beam, &#x2014;an imaging device () for generating an optical Fourier transform of the plurality of emitters at a Fourier plane (). The dispersive device () is positioned displaced from said Fourier plane () by a predetermined displacement (d) in a direction along said principle axis ().

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Værløse, Denmark

Ole Bjarlin Jensen