Efficient 2 µm emission in Nd3+/Ho3+ co-doped silicate-germanate glass pumped by common 808 nm LD

Nd3+/Ho3+ co-doped silicate-germanate glass has been synthesized by high temperature melt-quenching method. Near infrared emission centered at 2 µm has been successfully obtained by incorporating Nd3+ and Ho3+ in present glass. The Judd-Ofelt intensity parameters Ωt (t=2, 4, 6), and radiative properties of Ho3+ were calculated and discussed by using the Judd-Ofelt theory. The energy transfer processes and luminescence properties of Nd3+/Ho3+ co-doped glasses were analyzed pumped by a conventional 808 nm laser diode. Desirable spectroscopic characteristics indicates that Nd3+/Ho3+ co-doped silicate-germanate glass might be a good alternative matrix for 2 µm band mid-infrared laser.