Spectroscopic study of Er3+ doped borate glass system for green emission device, NIR laser, and optical amplifier applications

The 10BaO-20ZnO-20LiF-(50-x)B2O3-xEr(2)O(3) (x = 0, 0.1, 0.5, 0.7, and 1.0 mol %) glass system was studied for green emission device, NIR laser, and optical amplifier applications. The impact of Er3+ doping was assessed through structural, optical, and thermal properties. The Er3+ ions behaved as network modifiers and decreased the network rigidity by the transformation of [BO4]->[BO3] and Non-Bridging Oxygens. This was consistent with the decrease in the glass transition temperature. Ten absorption peaks of Er3+ ion equivalent to transitions from 4I15/2 to various excited levels were quantified through their oscillator strengths. Through broadband impedance spectroscopy, the insulating property of the glass system was authenticated by the persistence of dc-conductivity in the order of 10(-10) Scm-1 up to 523 K. With 378 nm excitation, a violet emission (H-2(9/2)-> I-4(15/2)) and two intense green emissions (H-2(11/2)-> I-4(15/2,) S-4(3/2)-> I-4(15/2)) were noticed. The NIR emission (I-4(13/2)-> I-4(15/2)) was observed at 1531 nm with 378 and 980 nm excitations and the corresponding decay curves were recorded. The Inokuti-Hirayama model indicated the increase in the energy transfer and reduction in critical distance amid the Er3+ ions with doping leading to energy migration through cross-relaxations and lifetime quenching. The laser parameters were determined from Fuchtbauer-Ladenburg theory. The color coordinates of the samples were lying in the green region, with purity >89% and CCT >6000 K. The gain coefficient from McCumber theory was positive for a population inversion >50%, with a wide gain between 1460 and 1565 nm, extending the application of the glass system as an optical amplifier in the S + C communication window.

Automated summary

The study investigated the impact of Er3+ doping in a 10BaO-20ZnO-20LiF-(50-x)B2O3-xEr(2)O(3) (x = 0, 0.1, 0.5, 0.7, and 1.0 mol %) glass system for green emission device, NIR laser, and optical amplifier applications. The Er3+ ions acted as network modifiers, decreasing the glass transition temperature. Various emissions were observed, including violet, intense green, and NIR emissions, showing potential applications in optical communication. The study also analyzed energy transfer and laser parameters, as well as the color coordinates and gain coefficient of the samples.