Device and method for characterizing an ultrashort laser pulse
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United States of America Patent
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Nov 14, 2017
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Oct 22, 2015
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Oct 23, 2014
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Abstract
The invention relates to a device (2) and to a method for characterizing an ultrashort laser pulse. Furthermore, the invention relates to use of a self-contained optical assembly in a device (2) for characterizing an ultrashort laser pulse. The device (2) comprises an imaging optical element (4) configured to image the incident laser pulse (6) in a direction of a straight line (L). A first optical element (10) is configured to apply predetermined varying group delay dispersion on the line focused laser pulse. A non-linear optical element (14) is configured to generate a second harmonic laser pulse (30). An optical grating (20) generates a diffraction of the second harmonic laser pulse, which is imaged on a flat sensor (24). A processing unit (36) determines a best fit for the captured image thereby calculating a frequency spectrum and a spectral phase of the laser pulse.
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