Enhancement of Optical Telecommunication Bands: Pr(3+)-Doped Halide Phosphate Glasses Display Broadband NIR Photoluminescence Emission

In the optical energy gap, visible and near-IR emission of halide phosphate glasses with a composition of 40P(2)O(5)-30ZnO-20LiCl-10BaF(2) in mol% doped with 3.5 × 10(4) ppm Pr(2)O(3), referred to as PZLBPr, were synthesized. The UV-VIS-NIR and spectroscopic properties of these glasses were also predicted. The current glasses had broadband emission photoluminescence covering a wavelength range of 1250 to 1700 nm when excited at 455 nm. These bands for near-infrared emission luminescence relate to the transitions (1)G(4) → (3)H(5), (1)D(2) → (1)G(4), and (3)H(4) → (3)F(3), (3)F(4) in the optical telecommunication window. The significant PL emission wideband was caused by the radiative transition from Pr(3+): (1)D(2) to (1)G(4). At 445 nm excitation, these glasses exhibited emission bands that corresponded to blue/reddish orange spectral ranges in visible ranges. The prepared glass has a high lasing quality factor (Ω(4)/Ω(6) = 0.9), high optical energy (4.72 eV), and quantum efficiency = 87.3% with FWHM = 156 nm of transition emission from the (1)D(2) → (1)G(4) level. As a result, broadband near infrared optical amplifiers can be fabricated from the prepared glasses.