Article

Yb:tellurite laser glass with high emission cross-section

Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-216, Shanghai 201800, China
Materials Letters DOI:10.1016/S0167-577X(99)00132-9 pp.209-214

ABSTRACT The emission cross-section for the transition of Yb3+ has been determined from absorption and emission measurements of tellurite glasses at room temperature. By systematic variations in the spectroscopic properties with composition, glass composition with emission cross-sections more than 2.30 pm2 and fluorescence lifetimes longer than 0.90 ms were obtained and have the advantage over some excellent laser glasses reported in published papers.

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    Article: Spectroscopic properties of lead fluoroborate glasses doped with ytterbium.
    L Kassab, S Tatumi, A Morais, L Courrol, N Wetter, V Salvador
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    ABSTRACT: A new lead fluoroborate glass (PbO-PbF2-B2O3) doped with ytterbium (Yb:PbFB) is presented. Samples with different concentrations of Yb3+ were produced and had their emission cross-sections, fluorescence lifetimes and minimum pump intensities determined. They have high refractive index of 2.2 and a density of 4.4 g/cm3. For a doping level of 1.153x1020 ions/cm3, the fluorescence lifetime, after excitation at 968 nm, is 0.81 ms, which is comparable to Yb:tellurite laser glass. Also, an emission band at 1022 nm is measured with emission cross-section of approximately 1.07x10-20 cm2 and fluorescence effective linewidth of 60 nm, which is comparable to Yb:phosphate laser glass.
    Optics Express 06/2001; 8(10):585-9. · 3.59 Impact Factor
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Keywords

absorption
 
emission cross-section
 
emission cross-sections
 
emission measurements
 
excellent laser glasses
 
glass composition
 
papers
 
room temperature
 
systematic variations
 
tellurite glasses