Broadband 2.84 μm luminescence properties and Judd-Ofelt analysis in Dy3+ doped ZrF4-BaF2-LaF3-AlF3-YF3 glass

2.84 μm luminescence with a bandwidth of 213 nm is obtained in Dy3+ doped (ZrF4-BaF2-LaF3-AlF3-YF3) ZBLAY glass. Three intensity parameters and radiative properties have been determined from the absorption spectrum based on the Judd-Ofelt theory. The 2.84 μm emission characteristics and energy transfer mechanism upon excitation of a conventional 808 nm laser diode are investigated. The prepared Dy3+ doped ZBLAY glass possessing high predicted spontaneous transition probability (45.92 s-1) along with large calculated emission cross section (1.17x10-20 cm2) has potential applications in 2.8 μm laser. - Highlights: → Broadband 2.84 μm emission obtained in Dy3+ doped ZBLAY glass. → Radiative properties determined using the Judd-Ofelt theory. → Energy transfer analyzed when pumped by conventional 808 nm LD. → Present glass possesses high emission cross section and transition probability. → Dy3+ doped ZBLAY glass is a good candidate for efficient 2.8 μm laser.