Enhanced emission in the NIR range by Nd3+ doped borosilicate glass for lasing applications

• Published in: Applied physics. B, Lasers and optics Lasers and optics, 2024-09, Vol.130 (9), Article 157
• Main Authors: Tayal, Yasha, Talewar, Rupesh A., Mahamuda, Sk, Maheshwari, Kartika, Kumari, Sheetal, Kumar, Mohit, Pilania, Ravita, Prasad, Aman, Rao, A. S.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Band theory; Borosilicate glass; Dipole interactions; Emission analysis; Emission spectra; Engineering; Excitation spectra; Fiber lasers; Lasers; Lasing; Optical Devices; Optics; Parameters; Photonics; Physical Chemistry; Physics; Physics and Astronomy; Quantum efficiency; Quantum Optics; Stimulated emission; Thermogravimetric analysis
• ISSN: 0946-2171; 1432-0649
• DOI: 10.1007/s00340-024-08294-x

Borosilicate glasses were prepared via melt quench technique with different concentration of Nd 3+ ions. X-ray diffraction (XRD) was performed for the prepared glass to study the amorphous structure. The glass stability was studied by Thermo-gravimetric Analysis (TGA). Spectroscopic analysis of the prepared glasses was done through absorption, excitation, emission and decay measurements. Absorption spectra was used to evaluate the J-O parameters. Radiative parameters are evaluated with the help of application of J-O theory. Emission spectra show three prominent bands in NIR region arising from 4 F 3/2  →  4 I 9/2 , 4 I 11/2 and 4 I 13/2 centered around 910, 1068 and 1339 nm accordingly, with the most intense being the one at 1068 nm. Stimulated emission cross section, branching ratio and quantum efficiency for 4 F 3/2  →  4 I 11/2 transition is very high and is suitable for lasing applications. Dipole–dipole interaction is observed among activator ions on the basis of Dexter theory. The optimized Nd 3+ doped glass (NBS10) possess maximum value for all radiative parameters and hence can be best suited for applications in the area of lasers and fiber amplifiers.