The basic ideas of the 'white-light' laser cooling and trapping are discussed and the applications to atom and ion cooling and trapping are presented. 'White-light' cooling allows one to maximize at the same time both the velocity capture range and the cooling rate. This give the possibility to improve the trapping collection efficiency, to reach lower temperatures in presence of strong heating processes, to cool and trap atoms by involving very narrow transitions from metastable levels. The definition and the realization of 'white' laser sources is presented and the improvements achieved with respect to the use of single mode lasers is demonstrated in the case of fast ions confined in a storage ring and in magneto-optical trapping of neutral atoms.
L. Moi, L. Moi,
"White-light laser cooling and trapping", Proc. SPIE 4397, 11th International School on Quantum Electronics: Laser Physics and Applications, (9 April 2001); doi: 10.1117/12.425126; https://doi.org/10.1117/12.425126