Transportable laser system for atom interferometry
  We describe an optical bench in which we lock the relative frequencies or phases of a set of three lasers in order to use them in a cold atoms interferometry experiment. As a new feature, the same two lasers serve alternately to cool atoms and to realize the atomic interferometer. This requires a fast change of the optical frequencies over a few GHz. The number of required independent laser sources is then only 3, which enables the construction of the whole laser system on a single transportable optical bench. Recent results obtained with this optical setup are also presented. 
P. Cheinet (SYRTE), F. Pereira Dos Santos (SYRTE), T. Petelski   (SYRTE), J. Le Gou\"et (SYRTE), K. T. Therkildsen (SYRTE), ...