Investigation on 1.07 μm laser emission in Nd3+-doped sodium fluoroborate glasses
来源期刊：JOURNAL OF RARE EARTHS2012年第5期
论文作者：D.Umamaheswari B.C.Jamalaiah T.Sasikala G.V.Lokeswara Reddy L.Rama Moorthy
文章页码：413 - 417
摘 要：Spectroscopic and fluorescence properties of Nd 3+ ions in sodium fluoroborate（SFB） glasses were prepared and characterized through optical absorption,emission and decay measurements.The energy level analysis was carried out using free-ion Hamiltonian model.Experimental oscillator strengths were determined by measuring the area encompassed by the absorption peaks recorded for 1.0 mol.% Nd 3+-doped glasses.The Judd-Ofelt parameters（2,4,6） were used to evaluate the laser characteristic parameters such as radiative transition probability（A R）,radiative decay time（τ R）,fluorescence branching ratio（β R） and stimulated emission cross-section（σ e） for the 4 F 3/2 metastable state.The fluorescence spectra for different concentrations of Nd 3+ ions were recorded by exciting the samples at 514.5 nm Ar + ion laser.
D.Umamaheswari1，B.C.Jamalaiah2，T.Sasikala1，G.V.Lokeswara Reddy1，L.Rama Moorthy1
1. Department of Physics,Sri Venkateswara University,Tirupati,517 502,India2. Department of Physics,Changwon National University,Changwon,641 773,Republic of Korea
摘 要：Spectroscopic and fluorescence properties of Nd 3+ ions in sodium fluoroborate（SFB） glasses were prepared and characterized through optical absorption,emission and decay measurements.The energy level analysis was carried out using free-ion Hamiltonian model.Experimental oscillator strengths were determined by measuring the area encompassed by the absorption peaks recorded for 1.0 mol.% Nd 3+-doped glasses.The Judd-Ofelt parameters（2,4,6） were used to evaluate the laser characteristic parameters such as radiative transition probability（A R）,radiative decay time（τ R）,fluorescence branching ratio（β R） and stimulated emission cross-section（σ e） for the 4 F 3/2 metastable state.The fluorescence spectra for different concentrations of Nd 3+ ions were recorded by exciting the samples at 514.5 nm Ar + ion laser.
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