Model and setup of the prototype of the polychromatic laser guide star at Observatoire de Haute-Provence

Details Model and setup of the prototype of the polychromatic laser guide star at Observatoire de Haute-Provence Model and setup of the prototype of the polychromatic laser guide star at Observatoire de Haute-Provence

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf...69f&link_type=abstract

"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes

Astronomy and Astrophysics

Astrophysics

Scientific paper

We discuss our Polychromatic Laser Guide Star (PLGS) end-to-end model and describe the the status of demonstrator at OHP. PLGS aims at measuring the tilt from the LGS without any NGS. Two dye pulsed laser chains locked at 589 and 569nm are required. Beams will deliver 34 W each, so that 22 W will be deposited into the mesosphere. These lasers are being settled in the building of the OHP 1.52m telescope. Beams will propagate from there to the launch device attached to the 1.52 m telescope through a train of mirrors with constant incident angles. The coudé focus of the 1.52m telescope will be equipped with an adaptive optics device, closely derived from the ONERA's BOA one. The Strehl ratio at 330nm is expected to be 30-40% for r_0 = 8-10cm. The full demonstrator is planned to run in 2010.

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