【摘 要】
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Enhanced 2.7 \mu m emission is obtained in Er3 /Tm3 and Er3 /Ho3 codoped ZBYA glasses. Absorption and emission spectra are tested to characterize the 2.7 \mu m emission properties of Er3 /Tm3 and Er3 /Ho3 doped ZBYA glasses and a reasonable energy t
【出 处】
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ChineseOpticsLetters
论文部分内容阅读
Enhanced 2.7 \mu m emission is obtained in Er3 /Tm3 and Er3 /Ho3 codoped ZBYA glasses. Absorption and emission spectra are tested to characterize the 2.7 \mu m emission properties of Er3 /Tm3 and Er3 /Ho3 doped ZBYA glasses and a reasonable energy transfer mechanism of 2.7 \mu m emission between Er3 and Tm3 Ho3 ) ion is proposed. Codoping of Tm3 or Ho3 significantly reduces the lifetime of the Er3 : 4I13/2 level due to the energy transfer of Er3 :4I13/2 →Tm3 :3F4 or Er3 :4I13/2 →Ho3 : 5I7. Thus, the 2.7 \mu m emission is strengthened and the 1.5 \mu m emission is decreased accordingly especially in the Er3 /Tm3 sample. The upconversion effects between the Er3 /Tm3 and Er3 /Ho3 doped ZBYA glasses are different attribute to the different energy transfer efficiencies. Both of the two codoped samples possess nearly equal large emission cross section (16.6 \times 10-21 cm-2) around 2.7 \mu m. The results indicate that this Er3 /Tm3 or Er3 /Ho3 doped ZBYA glass has potential applications in 2.7 -m laser.
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