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<p>Er³-doped zinc fluoroborate glasses with the composition (45–x)B<sub>2</sub>O<sub>3</sub>–25ZnF<sub>2</sub>–15K<sub>2</sub>O–15LiF–xEr<sub>2</sub>O<sub>3</sub> (where, x = 0.25, 0.5, 0.75 and 1.0 wt%) were synthesized via the conventional melt-quenching technique. These glasses were characterized using XRD, FTIR, optical absorption, excitation, visible and NIR emission spectroscopy. The broad scattering at lower angles in the XRD spectrum indicates the long-range structural disorderliness of the glasses and the pattern does not reveal any crystalline phase thus confirms the amorphous nature. FTIR spectra revealed the fundamental stretching and bending vibrations of borate groups like trigonal BO<sub>3</sub> and tetrahedral BO<sub>4</sub> units in the present glasses. Judd–Ofelt (JO) analysis of the absorption spectra was performed to extract JO intensity parameters as well as radiative properties, where a higher Ω<sub>2</sub> values indicated greater asymmetry around Er³ ions. The visible and near infrared luminescence spectra showed enhanced radiative properties such as transition probability (A), stimulated emission cross-section (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{\sigma\:}_{P}^{E}\)</EquationSource> </InlineEquation>), branching ratios (β<sub>R</sub>) and radiative lifetime (τ<sub>R</sub>) for the <sup>2</sup>H<sub>11/2</sub>+<sup>4</sup>S<sub>3/2</sub>→<sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>I<sub>13/2</sub>→<sup>4</sup>I<sub>15/2</sub> transitions, extending the application of the present glass system for waveguide laser and optical amplifier at 1.53&#xa0;μm. The CIE 1931 chromaticity diagram confirmed that the (x, y) color coordinates fall within the green region, supporting the suitability of these glasses for green light emitting device applications. By using the Mc-Cumber theory, the absorption cross-section (σ<sub>a</sub>), emission cross-section (σ<sub>e</sub>), and gain coefficient (G<sub>λ</sub>) for the NIR <sup>4</sup>I<sub>13/2</sub>→<sup>4</sup>I<sub>15/2</sub> transition, were calculated and reported. The transition <sup>4</sup>I<sub>13/2</sub>→<sup>4</sup>I<sub>15/2</sub> in ZFB0.5E glass exhibits higher stimulated emission cross-section, broad gain bandwidth, and substantial gain coefficient among the prepared glasses highlighting its potential as an efficient gain medium for 1.53&#xa0;μm optical amplifiers and telecommunication photonic applications.</p>

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Effect of Er3+ Ions on the Spectroscopic Properties of Zinc Fluoroborate Glasses for Green Emitting Device and Optical Amplifier Applications

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • M. Mariyappan,
  • P. Suthanthira Kumar,
  • R. Vijayakumar,
  • L. Chitra,
  • A. Senthil Kumar,
  • D. Ganeshkumar,
  • M. Sino Sebastian,
  • W. Wahith Hussain,
  • A. Keerthik Roshan

摘要

Er³-doped zinc fluoroborate glasses with the composition (45–x)B2O3–25ZnF2–15K2O–15LiF–xEr2O3 (where, x = 0.25, 0.5, 0.75 and 1.0 wt%) were synthesized via the conventional melt-quenching technique. These glasses were characterized using XRD, FTIR, optical absorption, excitation, visible and NIR emission spectroscopy. The broad scattering at lower angles in the XRD spectrum indicates the long-range structural disorderliness of the glasses and the pattern does not reveal any crystalline phase thus confirms the amorphous nature. FTIR spectra revealed the fundamental stretching and bending vibrations of borate groups like trigonal BO3 and tetrahedral BO4 units in the present glasses. Judd–Ofelt (JO) analysis of the absorption spectra was performed to extract JO intensity parameters as well as radiative properties, where a higher Ω2 values indicated greater asymmetry around Er³ ions. The visible and near infrared luminescence spectra showed enhanced radiative properties such as transition probability (A), stimulated emission cross-section ( \(\:{\sigma\:}_{P}^{E}\) ), branching ratios (βR) and radiative lifetime (τR) for the 2H11/2+4S3/2→4I15/2 and 4I13/2→4I15/2 transitions, extending the application of the present glass system for waveguide laser and optical amplifier at 1.53 μm. The CIE 1931 chromaticity diagram confirmed that the (x, y) color coordinates fall within the green region, supporting the suitability of these glasses for green light emitting device applications. By using the Mc-Cumber theory, the absorption cross-section (σa), emission cross-section (σe), and gain coefficient (Gλ) for the NIR 4I13/2→4I15/2 transition, were calculated and reported. The transition 4I13/2→4I15/2 in ZFB0.5E glass exhibits higher stimulated emission cross-section, broad gain bandwidth, and substantial gain coefficient among the prepared glasses highlighting its potential as an efficient gain medium for 1.53 μm optical amplifiers and telecommunication photonic applications.