JUDD-OFELT ANALYSIS AND RADIATIVE PROPERTIES OF ERBIUM-DOPED PHOSPHO-TELLURITE GLASSES FOR EFFICIENT 1.53 µm LASER APPLICATIONS
DOI:
https://doi.org/10.55766/sujst9845Keywords:
Judd–Ofelt, Lasers, McCumber, Phospho–telluriteAbstract
Er³⁺-doped phospho–tellurite glasses were synthesized via the melt-quenching technique and investigated for their structural and optical properties. XRD confirmed the amorphous nature, while FTIR spectra revealed characteristic vibrational modes associated with P–O and Te–O bonds. The optical absorption spectra exhibited multiple 4f–4f transitions of Er³⁺ ions, with a prominent band at 1536 nm corresponding to the 4I₁₃⁄₂ → 4I₁₅⁄₂ transition. Judd–Ofelt analysis yielded intensity parameters following the trend Ω₂ > Ω₆ > Ω₄, indicating a moderately asymmetric environment and rigid glass network. The 1.5 mol% Er₂O₃-doped sample demonstrated a high stimulated emission cross-section (33.68 × 10⁻²² cm²), a branching ratio greater than 0.5, and a broad emission bandwidth around 1.53 μm. These characteristics suggest suitability for optical amplification. McCumber analysis revealed positive gain for population inversion levels exceeding 60%, supporting the material's potential for C-band optical communication. Overall, the investigated glass system is a promising candidate for use in near-infrared “eye-safe” lasers and optical amplifiers operating at 1.53 μm.
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