In this paper we report, for the first time, the observation of optical hole burning in a solid, ruby. In addition, we describe experimental results which show that optical saturation of the inhomogeneously broadened R1 line in ruby at 4.2°K occurs not only for ions in resonance with the saturating radiation but also for ions at frequencies up to about 50 MHz away from the radiation frequency. This result and others are consistent with a model in which cross relaxation occurs in the ground-state levels between ions in resonance with the laser beam and nonresonant ions.
American Physical Society
Physical Review B11, no. 11: 4512–4517.
Mr. Szabo was affiliated with the National Research Council of Canada, Radio and Electrical Engineering Division when they authored this article.