Spectroscopic characteristics and gain cross-section profiles of erbium-doped boro-tellurite glasses for optical amplifier applications

• Published in: Optical materials Vol. 148; p. 114950
• Main Authors: Kiran Kumar, B., Reddi Babu, P., Kavaz, Esra, Kshetri, Yuwaraj K., Kim, Tae-Ho, Anjos, Virgilio de Carvalho dos, Deva Prasad Raju, B.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2024
• Subjects: 1.53 μm lasers; Boro-tellurite glasses; Er3+ ions; Gain-cross-section; Optical amplifiers; Radiative characteristics; Boro-tellurite glasses; 1.53 μm lasers; Gain-cross-section; Er3+ ions; Optical amplifiers; Radiative characteristics
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2024.114950

A series of glass compositions (60-x) B2O3–10TeO2–15BaCO3–15MgF2–xEr2O3 with diverse quantities of erbium ions (Er3+) was synthesized using the melt quenching method and the samples were subjected to thorough characterization to explore their optical and structural properties. In order to ascertain the amorphous nature of the glass and acquire a deeper understanding of its chemical bonding, conventional methods of characterization, such as X-ray diffraction and Fourier transform infrared spectroscopy, were utilized. The Judd-Ofelt intensity parameters were computed using the absorption spectra of glasses doped with Er3+, providing vital information about the local environment and coordination of Er3+ ions in the glass matrix. The glasses underwent the collection of near -infrared (NIR) emission spectra. Following this, an analysis was carried out to look into and understand the spectral properties, emission cross-section, and gain coefficient parameters of the glasses. The spectra obtained discernible characteristics, notably a significant near-infrared (NIR) band associated with the transition between the 4I13/2 and 4I15/2 states. This band was seen to have a central wavelength of 1530 nm. This emission band spanned the wavelengths commonly used in optical communication systems (S + C) -bands, making these glasses suitable candidates for applications such as wavelength division multiplexing (WDM). These results suggest that the boro-tellurite glass may have potential use in photonic devices designed for near-infrared applications, including optical communication systems.
•Erbium doped boro-tellurite glasses were prepared by melt quench technique.•J-O parameters were evaluated and the Ω2 values are found to increases from 6.6678 to 7.9266 × 10−21 cm2 with increment of Er3+ ions concentration from 0.1 to 2.0 mol% and it followed the trend of Ω2> Ω6> Ω4.•The gain cross-section spectrum was obtained for all the glass samples and it has been observed that the highest attainable value is achieved at γ = 1 for all samples, with the highest gain-cross section of 2.571 × 10−20 cm2 for BTBMER20 glass samples.•The effective bandwidth Δλeff of 77.56 nm, gain bandwidth of 114.73 × 10−27 cm3, and optical gain of 57.12 × 10−24 cm2s were obtained for BTBMEr20 glass sample.•BTBMEr20 glass holds promise as a possible candidate for optical amplification processes at 1.53 μm.