Observation of hole burning and cross relaxation effects in ruby

摘要: In this paper we report, for the first time, observation of optical hole burning in a solid, ruby. addition, describe experimental results which show that saturation inhomogeneously broadened ${R}_{1}$ line ruby at 4.2\ifmmode^\circ\else\textdegree\fi{}K occurs not only ions resonance with saturating radiation but also frequencies up to about 50 MHz away from frequency. This result and others are consistent model cross relaxation ground-state levels between laser beam nonresonant ions.