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28 July 2010A bright, pulsed, guide star laser for very large telescopes
We demonstrate for the first time the practical feasibility of a new sodium guide star laser with a
pulsed burst output of sufficient energy at 589nm to be useful for current applications and readily
scalable to meet future requirements. We describe complete experimental design verification results
of the pulse burst laser concept, optimized to eliminate guide-star elongation issues and to meet all
requirements for Multi Conjugate Adaptive Optics (MCAO) for future extremely large ground-based
telescopes (ELTs). It makes use of sum frequency generation (SFG) of two, Q-switched, injection
mode-locked, wavelength stabilized Nd:YAG lasers, producing a
macro-micro, pulse-burst output
which is optimized in power and bandwidth to maximize the fluorescence from the high altitude
sodium layer.
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Jesper Munch, Murray Hamilton, David Hosken, Nikita Simakov, Peter Veitch, "A bright, pulsed, guide star laser for very large telescopes," Proc. SPIE 7736, Adaptive Optics Systems II, 77361X (28 July 2010); https://doi.org/10.1117/12.856821