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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 8,
  • Issue 1,
  • pp. 78-81
  • (2010)

2 µm emission performance of Tm3+-Ho3+ co-doped tellurite glasses

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Abstract

The emission properties of 2 µm region fluorescence of Tm<sup>3+</sup>-Ho<sup>3+</sup> co-doped tellurite glasses are investigated. Introducing F<sup>-</sup> ions to the composition of tellurite glasses plays a positive effect on the 2 µm emission. A maximum intensity of 2 µm emission is achieved when 1.5-mol% Tm<sub>2</sub>O<sub>3</sub> and 1-mol% Ho<sub>2</sub>O<sub>3</sub> concentration are doped in the glasses. The emission cross section and gain coefficient of the <sup>5</sup>I<sub>8</sub>→<sup>5</sup>I<sub>7</sub> transition of Ho<sup>3+</sup> are calculated. The emission cross section has a maximum of 1.29×10<sup>-20</sup> cm<sup>2</sup> at 2048 nm wavelength. The results indicate that Tm<sup>3+</sup>-Ho<sup>3+</sup> co-doped tellurite glasses are suitable for 2 µm application.

© 2010 Chinese Optics Letters

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