Spectroscopic properties of Nd 3+ , Yb 3+ -doped and Nd 3+ –Yb 3+ -codoped high silica glass

The Nd 3+ , Yb 3+ -doped and Nd 3+ –Yb 3+ -codoped high silica glasses (HSGs) were fabricated by sintering porous glasses impregnated with Nd 3+ and Yb 3+ ions solutions. The Judd–Ofelt theory was used to study the spectroscopic properties of Nd 3+ -doped HSGs. Large parameter Ω 2 of Nd 3+ -doped HSGs suggests a lower centrosymmetric coordination environment around the Nd 3+ in HSG. The spontaneous emission probability and emission cross-section (σ em ) of Yb 3+ -doped HSGs are obtained. A broad emission band from 950 to 1,100 nm was detected when the Nd 3+ –Yb 3+ -codoped HSG was excited by 808 nm LD. The energy transfer process from Nd 3+ to Yb 3+ in HSG was described in this paper.