High power modeless lasers for sodium laser guide stars

F. Marc (1) , I. C. Moldovan (1) , H. Guillet de Chatellus (1) , V. Fesquet (1) , J. P. Pique (1)

1 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]

An increasing number of adaptive optics systems in astronomy uses a sodium Laser Guide Star (LGS). The analysis of the distorsion of the return fluorescence requires high power lasers. We expose here two modeless laser amplifiers, based on a longitudinaly pumped 1 cm-long dye cell: the first one is a 4-pass amplifier at 589 nm pumped at 532 nm and the second one is a 4-pass amplifier at 660 nm pomped at 511 and 578 nm. These systems correspond respectively to the monochromatic and the polychromatic laser guide stars.

Domaines: Optique [physics.optics]; Physique [physics]

F. Marc, I. C. Moldovan, H. Guillet de Chatellus, V. Fesquet, J. P. Pique. High power modeless lasers for sodium laser guide stars. Annales de Physique Colloque, 2007, 32 (2-3), pp.83 - 85. ⟨10.1051/anphys:2008013⟩. ⟨hal-01118427⟩