Polychromatic Laser Guide Star. Progress report and modeless laser
Résumé
We report the current status of the polychromatic laser guide star pro-
gramme ELP-OA, and the new developments: the modeless laser allowing
a continuous match of the laser FWHM with that of the Na D2 line in the
mesosphere, and ATTILA the ¯rst bench of the ELP-OA demonstrator.
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