Spectral Analysis of Nd3+ Doped Lead Borosilicate Glasses for Efficient Broadband Laser Amplification

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M. Reddi Babu, N. Madhusudhana Rao, A. Mohan Babu, (2017). Spectral Analysis of Nd3+ Doped Lead Borosilicate Glasses for Efficient Broadband Laser Amplification. Mechanics, Materials Science & Engineering, Vol 9. doi:10.2412/mmse.59.84.971

Authors: M. Reddi Babu, N. Madhusudhana Rao, A. Mohan Babu

ABSTRACT. In this investigation, Nd3+ doped lead borosilicate glasses (LBS) were prepared with chemical composition of (30-x) PbO – 40 H3BO3 –10 SiO2 – 10 Al2O3 – 10 LiF – x Nd2O3 (where x varies from 0.0, 0.1, 0.5, 1.0 and 2.0 mol%) by conventional melt-quenching method. The spectroscopic analysis can be done using absorption, emission and decay measurements. The oscillator strengths (fexp and fcal) and the evaluated Judd-Ofelt (JO) intensity parameters (Ωλ, λ = 2, 4 and 6) determined from the absorption spectrum. From the emission spectra, three NIR bands observed at 903, 1060 and 1334 nm corresponding to the 4F3/24I9/2, 4F3/24I11/2 and 4F3/24I13/2 transitions, respectively for which the effective bandwidths (ΔλP), radiative transition probabilities (AR) branching ratios (βR) and stimulated emission cross-sections (σse) are also evaluated. The intensities of emission bands increased with the increase of Nd3+ ions concentration upto 1.0 mol% and then decreased at higher concentrations due to the concentration quenching. From the analysis of emission properties, it is concluded that the Nd3+ doped LBS glasses could be useful for various photonic applications in different fields.

Keywords: Lead borosilicate glasses, JO analysis, Intensity parameters, Emission analysis, Concentration quenching.

DOI 10.2412/mmse.59.84.971

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