| Issue |
Ann. Phys. Fr.
Volume 32, Number 2-3, 2007
COLOQ'1010th conference on lasers and quantum optics
|
|
|---|---|---|
| Page(s) | 75 - 77 | |
| Section | Short contributions | |
| DOI | https://doi.org/10.1051/anphys:2008011 | |
| Published online | 23 May 2008 | |
Ann. Phys. Fr., Vol. 32, N°2-3 2007, pp. 75-77
Efficiency of 2-photon polychromatic laser guide stars
Laboratoire de Spectrométrie Physique,
UMR 5588 CNRS-Université Joseph Fourier, 140 avenue de la Physique, B.P. 87, 38402 Saint Martin d'Hères, France
Corresponding author: jean-paul.pique@ujf-grenoble.fr
Polychromatic laser guide stars (PLGS) are created by resonant excitation of the mesospheric sodium by two pulsed lasers at 589 nm and 569 nm respectively. The efficiency of this process is investigated numerically by means of both Bloch equations and rate equations models. The influence of numerous laser parameters is studied. For 2×25 W laser average power the return flux is below 105 photons/s/m2.
© EDP Sciences, 2008