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

TL;DR

This paper presents a high-power, frequency-doubled laser system derived from a telecom fiber laser for efficient cooling of 87Rb atoms, utilizing advanced nonlinear crystals to achieve significant power conversion.

Contribution

Development of a simple, efficient frequency doubling setup from a telecom fiber laser to produce high-power 780 nm light for rubidium cooling.

Findings

Achieved up to 1.8 W at 780 nm from 10 W at 1560 nm.

Utilized a 50-mm long ppLN:MgO crystal for efficient doubling.

Potential application for potassium atom trapping at 767 nm.

Abstract

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