Generation of phase-coherent laser beams for Raman spectroscopy and cooling by direct current modulation of a diode laser

Jean Ringot (1, 2) , Yann Lecoq (1) , Jean Claude Garreau (1, 2) , Pascal Szriftgiser (1, 2)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
2 CERLA - Centre d'Etudes et de Recherches Lasers et Applications

A setup for generation of GHz side-bands by direct current modulation of a diode laser is described. The first order side-bands are used to inject two slave power diode lasers, in order to produce phase coherent, controllable frequency shifted, light beams, the mutual phase coherence of which has been verified (beat-note FWHM of 1 Hz, instrumentally limited). Some possible applications in the context of laser Raman cooling of cesium atoms are briefly discussed.

Domaines: Optique [physics.optics]; Physique Atomique [physics.atom-ph]

Jean Ringot, Yann Lecoq, Jean Claude Garreau, Pascal Szriftgiser. Generation of phase-coherent laser beams for Raman spectroscopy and cooling by direct current modulation of a diode laser. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 1999, 7, pp.285-288. ⟨10.1007/s100530050571⟩. ⟨hal-00014987⟩