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Laser transition characteristics of Nd3+-doped fluorophosphate laser glasses |
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| Institution: | 1. Department of Physics, Sri Venkateswara University, Tirupati – 517 502, India;2. Department of Physics, Government Degree College, Wanaparthy – 509 103, India;3. High Power Laser Optics Laboratory, Laser Plasma Division, Centre for Advanced Technology, Indore – 452 013, India;4. Dipartimento Scientifico e Tecnologico, Università di Verona and INSTM, UdR Verona, Ca’Vignal, Strada Le Grazie 15, I-37134 Verona, Italy;1. Department of Physics, Indian Institute of Science, Bangalore, India;2. Department of Material Science and Engineering, Lehigh University, Bethlehem, PA, USA;3. Alfred University, New York State College of Ceramics, Alfred, NY, USA;4. Corning Incorporated, Corning, NY, USA;5. Department of Instrumentation, Indian Institute of Science, Bangalore, India;6. Materials Research Centre, Indian Institute of Science, Bangalore, India |
| Abstract: | Fluorophosphate glasses of composition P2O5–K2O–MgO–Al2O3–AlF3 and P2O5–K2O–MgO–Al2O3–BaF2 were prepared with different Nd3+ ion concentrations. The absorption and emission spectra in the UV–VIS–NIR region were measured for these glasses. Judd–Ofelt analysis has been carried out using the absorption spectra of 1.0 mol% Nd3+-doped glasses to evaluate the radiative properties for some luminescent levels of the Nd3+ ion. The stimulated emission cross-sections of the 4F3/2 → 4I11/2 laser transition for the present glasses are found to be higher than for other Nd3+-doped glasses. Branching ratio calculations also revealed the potentiality of the 4F3/2 → 4I11/2 transition for laser action in these glasses. The observed concentration quenching of the lifetime of the 4F3/2 level is explained as a result of cross-relaxation process between the Nd3+ ions. |
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