Lithium cadmium phosphate glasses doped Sm3+ as a host material for near-IR laser applications

• Published in: Optical materials 2021-01, Vol.111, p.110638, Article 110638
• Main Authors: Abdel Wahab, E.A., El-Maaref, A.A., Shaaban, Kh.S., Börcsök, J., Abdelawwad, M.
• Format: Article
• Language: English
• Subjects: Emission and absorption cross-section; FT-IR spectra; Judd Ofelt; Optical gain; Polarizability and optical basicity; Sm3+ doped LCP glasses
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2020.110638

Sm2O3 doped Lithium Cadmium Phosphate (LCP) glasses are synthesized by a classical melting method, and their molecular structures are investigated by X-ray Diffraction method (XRD). FT-IR spectra, UV–Vis–NIR spectra, and emission spectra of these glasses are collected and analyzed. The emission spectrum of the present glass shows four emission lines at wavelengths of 562 nm, 598 nm, 645 nm, and 706 nm. The dependence of electronic polarizability and optical basicity of the synthesized glasses on the refractive index and bandgap is investigated. Judd-Ofelt theory is used to evaluate oscillator strengths and JO intensity parameters of Sm3+-doped LCP glasses. The emission and absorption cross-sections of the 562 nm line, which is originated from 6P3/2 →6F5/2 transition, are calculated. Other emission spectral lines (598 nm, 645 nm, and 706 nm) couldn't be originated from transitions to the ground level. This is due to the weakness of the absorption transitions in this spectral region, i.e., 550 nm–900 nm. The most probable suggestion that these lines are originated from the transitions 4G9/2 → 6F1/2, 4G9/2 →6F5/2, and 6P3/2 →6F11/2. Emission and absorption cross-sections of some transitions in the Near-infrared spectral region are evaluated. Laser gain of the 1.1 μm and 1.2 μm emission lines are obtained, where a positive gain is observed at population factors (P) ≥0.6. [Display omitted] •Preparation and characterization of LCP glasses doped samarium oxide as laser host material.•Polarizability and optical basicity of LCP glasses doped samarium oxide are estimated.•PL emission measurements and chromaticity coordinates calculations are presented.•Judd-Ofelt calculations of optical parameters, energy levels and transition are obtained.•Laser gain of the 1.1 μm and 1.2 μm emission lines are calculated and it positive gain for (P) ≥0.6.