Investigation of Broad-Band Emitters as Potential Lasing Ions Between 0.5 and 1.0 micrometers.
Final rept. 1 Jun 76-30 Sep 78,
OWENS-ILLINOIS INC TOLEDO OH
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Ions exhibiting broad fluorescence bands in the 5000A to 10,000A region have been studied as potential lasing ions in various glass hosts. Included in the study were Eu2, Cu, Sn2, Sb2, Yb2, Ge2, and CdS. Glass hosts included silicates, borates, and phosphates. Spectral data were used to calculate peak emission cross sections and flashlamp pumping thresholds for various ion-host combinations. These data indicated that Eu2 should lase easily. Cu, Sn2, and Sb2 should also lase but would require significantly greater pumping energies. Gain loss measurements were made on selected glass rods by passing a CW laser beam through the rods during flashlamp pumping. No gain was measured. Instead, most rods showed a pumped absorption. This absorption was probably due to transient color center formation in the glass hosts themselves, rather than excited state absorption by the dopant ions. Flashlamp pumping studies of several of the ions in various hosts selected for low pumped absorption is recommended as further work. Also recommended is laser pumping, which would eliminate the shorter wavelength ultraviolet primarily responsible for color center formation. Author
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy