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      https://www.ias.ac.in/article/fulltext/boms/027/04/0367-0372

    • Keywords

       

      Sol–gel silica glass; laser material; absorption and emission cross-section.

    • Abstract

       

      Er3+ and Er3+ : Yb3+ doped optical quality, crack and bubble free glasses for possible use in making laser material have been prepared successfully through sol–gel route. The thermal and optical, including UV-visible absorption, FTIR etc characterizations were undertaken on the samples. The absorption characteristics of Er3+ doped samples clearly revealed the absorption due to Er3+ ions. On the other hand Yb3+ : Er3+ doped samples showed enhanced absorption due to ${}^{2}F_{7/2} \rightarrow {}^{2}F_{5/2}$ transition. The absorption and emission crosssection for ${}^{2}F_{7/2} \leftrightarrow {}^{2}F_{5/2}$ of Yb3+ were estimated. FTIR absorption spectra have clearly shown the reduction of the absorption peak intensity with heat treatment in the range 3700–2900 cm-1. The 960 cm-1 band also showed progressive decrease in the absorption band peak intensity with heat treatment. The result of the investigations with essential discussions and conclusions have been reported in this paper.

    • Author Affiliations

       

      Dipankar Mandal1 H D Banerjee1 M L N Goswami2 H N Acharya2

      1. Materials Science Centre, Optical Fibre Unit, Indian Institute of Technology, Kharagpur 721 302, India
      2. Central Research Facility, Optical Fibre Unit, Indian Institute of Technology, Kharagpur 721 302, India
    • Dates

       
  • Bulletin of Materials Science | News

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