<span style="font-size:12.0pt;line-height: 115%;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Optical studies and laser parameters of various Pr³⁺ doped glass systems</span>

Abstract

Absorption and fluorescence spectra have been studied in the range (400-2400 nm) and (400-800 nm) respectively of twelve glass specimens of Pr³⁺ doped (doping concentration 0.1 and 0.2 mol%) borophosphate, zinc chloride borophosphate, aluminoborophosphate, chlorophosphate, phosphate and borate glass systems. The specimens of glass systems have been prepared by melt quenching technique. Judd-Ofelt parameters (Ω_λ) evaluated using the observed spectral intensities have been used to calculate various laser parameters, viz .. spontaneous emission probability (<i>A</i>)<i>, </i>radiative life time (τ), fluorescence branching ratio (β) and stimulated emission cross-section (σ_p) for the three different laser transitions ³P₀ → ³H₄(485 nm), ³P₀ → ³H₆ (599 nm) and ³P₀ → ³F₂ (641 nm). A comparative study of laser parameters for the various types of glasses shows that aluminoborophosphate (ALBP) glasses are better for the laser transition ³P₀ → ³H₄ whereas for the laser transitions ³P₀ → ³H₆

and ³P₀ → ³F₂, borophosphate (BP) and zinc chloride borophosphate (CLBP) glasses respectively are much better than the other glasses studied. σ_p values for CLBP glasses for the laser transition ³P₀ → ³F₂ show a considerable increase (by a factor of ~2.5) over the σ_p values for the same transition in phosphate and chlorophosphate glasses.