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We built a frequency-doubled laser for 87Rb laser cooling, from a Telecomfiber laser. Thanks to intense technological development, telecom fiber lasersexhibit outstanding properties regarding relative intensity noise andmodulation bandwidth. The enhanced doubling efficiency of periodically poledcrystals allowed to obtain up to 1.8 W at 780 nm from 10 W at 1560 nm, with asimple pass configuration in a 50-mm long crystal of ppLN:MgO. This techniquecan also be applied at the wavelength of potassium (767 nm) (Bourdel, 2009) andcould be of great interest for the realization of dipole traps.

Source laser intense pour le refroidissement du 87Rb par doublement de fr\'equence d'un laser fibr\'e t\'el\'ecom