Physics – Optics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4644..374b&link_type=abstract
Proc. SPIE Vol. 4644, p. 374-385, Seventh International Conference on Laser and Laser-Information Technologies, Vladislav
Physics
Optics
1
Scientific paper
Artificial laser guide star (LGS) is usually created by excitation of sodium atoms in the natural layer at 90 km with a yellow laser beam at 589.2 nm. Such a spot-like source is used for guiding the adaptive optics system of telescopes, that allows to improve greatly the quality of images of real astronomic objects by correcting the wavefront distortions induced by atmospheric turbulence. In frames of ALFA project a single-frequency yellow source of 3-4 W output power has been developed and is already used for LGS excitation. In this paper we report on the pump laser for dye amplifier developed for the Max Planck Institute of Extraterrestrial Physics in Garching, Germany, that will be applied for substantial enhancement of the output power in the system. The developed argon laser provides high angular stability and beam quality by means of active cavity alignment at 70 W output level, that has no analogues. Basic principles and device design are described.
Babin S. A.
Goldort V. G.
Krasnikov Y. I.
Potapov Vladimir
Rybakov M. A.
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