Abstract
Laser beams have long been applied across many disciplines, extending degrees of freedom for purely spatial control to polarization spatial control. Adaptive beam shaping in Na Laser Guide Star approaches will be assessed for progress and lessons learned. Laser Guide Stars based on Rayleigh Scattering at 530 nm is straightforward: simply frequency double a Nd:YAG. For Na Laser Guide Stars, there is no easy way to get 589 nm and is more cotp:plicated. Significate Laser Guide Star Systems include the Starfire Optical Range (SOR), The Lick Laser Gude Star (UC), Caltech/Mt. Palomar, the Keck Laser Guide Star, ESQ VLT, and Gemini South. These will be compared for progress and future developments.
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