Stimulated Raman Adiabatic Passage in Tm$^{3+}$:YAG
  We report on the experimental demonstration of stimulated Raman adiabatic passage (STIRAP) in a Tm$^{3+}$:YAG crystal. Tm$^{3+}$:YAG is a promising material for use in quantum information processing applications, but as yet there are few experimental investigations of coherent Raman processes in this material. We investigate the effect of inhomogeneous broadening and Rabi frequency on the transfer efficiency and the width of the two-photon spectrum. Simulations of the complete Tm$^{3+}$:YAG system are presented along with the corresponding experimental results. 
A. L. Alexander and R. Lauro and A. Louchet and T. Chaneli\`ere and J.   L. Le Gou\"et