High-order laser guide star performance for the Euro50 telescope

Details High-order laser guide star performance for the Euro50 telescope High-order laser guide star performance for the Euro50 telescope

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005oexpr..13.1377f&link_type=abstract

Optics Express, vol. 13, Issue 5, p.1377

Physics

Optics

Scientific paper

High-order laser guide star performance for the Euro50 telescope is analyzed. Focus anisoplanatism residual errors using multiple LGSs are obtained by numerical simulations. Results calculated for annual mean conditions at the La Palma site show that, considering only focus anisoplanatism, it will be possible to obtain a Strehl ratio of 0.72~0.82 at 2.2 µm using 13 LGSs. A Strehl ratio of 0.60~0.70 can be obtained at 1.25 µm using 21 LGSs. The dependence of wavefront measurement error on pulsed laser power is also investigated. The variance of the measurement error is lower than 0.2 rad2 when the laser power is larger than 14 W.

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