Abstract

Different concentration of (0.1, 0.2, 0.3, 0.4, 0.5, 1.0 & 1.5) mol% of europium doped lead borate lithium glasses were prepared by melt quenching method. The properties of thermal, photoluminescence & structural were analyzed using DTA, FTIR and emission spectra. Emission spectra was used to evaluate the Judd-Ofelt (JO) parameters. Radiative parameters like stimulated emission cross-sections (σe), effective band width (∆λeff), transition probabilities (A), optical gain bandwidths (σe x ∆λeff), radiative lifetime (τrad) and optical gain (σe x τrad) values were evaluated for the transition 5D0→7Fj (j=1, 2, 3 and 4) of Eu3+ ions. The outcome of transition 5D0→7F4 at its highest value of branching ratios and stimulated emission cross-section are evaluated with the literature. Hence we can could the prepared host glass doped with Eu3+ ions are good fibre amplifiers and it can be used as a red laser.

Highlights

  • Glasses doped with RE ions are of larger interest due to their use in infrared-to-visible up-converters, solidstate lasers, bulk lasers, waveguide lasers, planar waveguides, temperature sensors, flat panel displays, field emission displays, optical fiber amplifiers, high-density memory devices, high-density frequency domain optical data storage, color display devices and electroluminescent devices [1,2,3]

  • NA (Numerical aperture) values of the prepared glass samples are between 0.3-0.4, if the NA values are between 0.130.5 such glasses are recommended as primary raw material for creation of optical fibres

  • The radiative parameters were determined from JO theories like stimulated emission cross-sections, radiative lifetime, total transition probabilities, and effective bandwidth using the equations specified in reference [25, 26] and these values are tabulated in table 4

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Summary

Introduction

Glasses doped with RE ions are of larger interest due to their use in infrared-to-visible up-converters, solidstate lasers, bulk lasers, waveguide lasers, planar waveguides, temperature sensors, flat panel displays, field emission displays, optical fiber amplifiers, high-density memory devices, high-density frequency domain optical data storage, color display devices and electroluminescent devices [1,2,3]. Among all RE ions, europium is a unique component because of the divalent or trivalent valence state. Photonic applications are used Eu3+ ion due to its property of red light emission, which was observed during the transition 5D0 -----7F2 state and it is very sensitivity to minute changes when surrounded by chemicals. The emission from non-degenerate 5D0 to 7Fj (j = 0–6) levels gives site symmetry around active ions and number of sites available for active ions [4,5,6,7]

Experimental studies
Optical studies
Thermal analysis
FTIR analysis
Fluorescence studies
Judd-Ofelt analysis
Decay analysis
Conclusion

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