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Article Dans Une Revue Journal of the Optical Society of America Année : 2003

Efficient modeless laser for a mesospheric sodium laser guide star

Résumé

Within the framework of a laser guide star and in order to solve the major problem of saturation of the sodium atom, we present an ``all-optical'' modeless laser that excites all sodium velocity classes. A theoretical and experimental study of the excitation of the sodium D2 line is presented in three cases: a single-mode laser of linewidth 1 MHz and modeless lasers of linewidths 3 and 4.5 GHz. The best result is obtained when the linewidth matches the Doppler-hyperfine sodium D2-line profile. By comparison with a single-mode laser excitation, we show that our modeless-laser sodium D2 star becomes six times brighter.
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Dates et versions

hal-01118356 , version 1 (03-03-2015)

Identifiants

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J. P. Pique, Sébastien Farinotti. Efficient modeless laser for a mesospheric sodium laser guide star. Journal of the Optical Society of America, 2003, 20. (10), pp.2093-2101. ⟨10.1364/JOSAB.20.002093⟩. ⟨hal-01118356⟩

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