Luminescence and stimulated emission of neodymium in sodium lanthanum molybdate powders

The results are given of an investigation of the luminescence and stimulated emission spectra of powder phosphors of the Na₅La_1-x Nd_x(MoO₄)₄ composition prepared by the method of solidstate synthesis. Stimulated emission of neodymium was observed under the influence of strong pumping with laser pulses of 30-nsec duration. Such emission was indicated by monochromatization of the spectrum, strong reduction in the duration of the pulses and a simultaneous steep rise of the luminescence intensity, and transformation of the excitation spectrum. The appearance of stimulated radiation had a clear threshold.