[en] The perturbation free environment and kinematically compressed velocity distribution of ion beams are ideal for high precision spectroscopic measurements using laser techniques. The limitations in the optical techniques are explored and the evolution to laser-rf double resonance techniques is described. Using the double resonance technique a 150-fold improvement in precision is achieved. Problems in applying the double resonance technique are encountered at low rf frequencies. A novel method based upon stimulated resonance Raman spectroscopy is described which circumvents these problems. 5 figs