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Optical properties of alkali and alkaline-earth lead borate glasses doped with Nd3+ Ions

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Abstract

Spectroscopic and physical properties of Nd3+-doped alkali lead borate glasses of type 20R 2O · 30PbO · 49.5B2O3 · 0.5Nd2O3 (R = Li and K) and alkaline-earth lead borate glasses 20RO · 30PbO · 49.5B2O3 · 0.5Nd2O3 (R = Ca, Ba, and Pb) have been investigated. Optical absorption spectra have been used to determine the Slater-Condon (F2, F4, and F6), spin orbit ξ4f, and Racah parameters (E1, E2, and E3). The oscillator strengths and the intensity parameters Ω2, Ω4, and Ω6 have been determined by the Judd-Ofelt theory, which, in turn, provide the radiative transition probability (A), total transition probability (A T ), radiative lifetime (τ R ), and branching ratio (β R , %) for the fluorescent levels. The lasing efficiency of the prepared glasses has been characterized by the spectroscopic quality factor (Ω4/Ω6), the value of which is in the range 0.2–1.5, typical of Nd3+ in different laser hosts. A red shift of the peak wavelength is observed upon addition of alkali or alkaline-earth oxides to the lead borate glass. A higher value of the W2 parameter for potassium-doped glass indicates a higher covalency for this glass matrix. The relative intensity of the peaks 4I9/2 → 4F7/2, 4S3/2 has also been studied.

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Authors and Affiliations

  1. Department of Physics, Guru Nanak Dev University, Amritsar, Punjab, 143005, India

    S. Mohan, K. S. Thind, D. Singh & L. Gerward

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  1. S. Mohan
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  2. K. S. Thind
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  3. D. Singh
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Mohan, S., Thind, K.S., Singh, D. et al. Optical properties of alkali and alkaline-earth lead borate glasses doped with Nd3+ Ions. Glass Phys Chem 34, 265–273 (2008). https://doi.org/10.1134/S1087659608030061

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