Spectroscopic Properties of Er³⁺ Doped Li₂O-Al₂O₃-BaO-P₂O₅ and Na₂O-Al₂O₃-BaO-P₂O₅ Glasses for Fiber Optic Communication Material

Abstract

Erbium doped phosphate glasses with Li₂O-Al₂O₃-BaO-P₂O₅-Er₂O₃ (Li glass) and Na₂O-Al₂O₃-BaO-P₂O₅-Er₂O₃ (Na glass) composition were produced using the melt-quench method to determine their spectroscopic properties. The optical absorption and fluorescence spectra were used to analyze the spectroscopic properties. The Judd-Ofelt intensity parameters ${\Omega }_{\lambda }(\lambda =2,4,6)$ were determined from the absorption band intensities. The Ω₂ parameter of a LABPEr glass is 1.50 × 10⁻²⁰ cm² that of a glass of s NABPEr glass is 0.41 × 10⁻²⁰ cm², which of the LABPEr glass is higher than the NABPEr glass. The radiative transition probability (A_R) of LABPEr and NABPEr are 133.03 and 80.38 s⁻¹, respectively. In predicting the emission cross-section $({\mathrm{\sigma }}_{\mathrm{e}})$ of ⁴I_13/2→⁴I_15/2 transition from the absorption cross-section $({\mathrm{\sigma }}_{\mathrm{a}})$ of ⁴I_15/2→⁴I_13/2 transition for Er³⁺ ions, the McCumber theory has been adopted. At 1.54 nm, intense broad infrared fluorescence was detected under 980 nm excitation. The optical gain G(λ) properties can be derived from the σ_a and σ_e values that the gain is positive for 50% population inversion in the 1536–1640 nm wavelength range.

Keywords:

• Erbium
• fiber optic communication materials
• phosphate glasses
• spectroscopic properties

Acknowledgments

The authors would like to thank Center of Excellence in Glass Technology and Materials Science (CEGM) Nakhon Pathom Rajabhat University and Department of Physics Faculty of Science King Mongkut’s University of Technology Thonburi for supporting. A. Prasatkhetragarn would like to acknowledge the Unit of Excellence on Sensors Technology, School of Science, University of Phayao.