Near-infrared emission from Pr-doped borophosphate glass for broadband telecommunication

► Broadband near-infrared emission from Pr-doped PBAY glass was investigated. ► Mechanism of Pr3+ luminescence was discussed. ► The infrared emissions were ascribed to the 3P0→1G4, 1G4→3H5, and 1D2→1G4 transitions of Pr3+ ions. ► The στ product of Pr3+ in the PBAY glass was calculated to be 3.44×10−23 cm2 s.