Optical properties of the polycrystalline transparent Nd: YAG ceramics prepared by two-step sintering

Optical properties of the polycrystalline transparent Nd: YAG ceramics prepared by two-step sintering- May 2011.

J Li, Q Chen, G Feng, W Wu, D Xiao, and J Zhu- Ceramics International, 2011
Nd-doped YAG ceramics were fabricated by the solid-state reaction and two-step vacuum sintering method. It is found that the samples exhibit pore-free and homogeneous microstructures and their transparency is up to 84.98% at the visible and near-infrared band and 87% in the mid-infrared wave range. The absorption cross section of 0.3% Nd:YAG at 808 nm is 5.47 × 10−20 cm2, while the emission cross section at 1064 nm is 4.66 × 10−19 cm2. The different transmittances of the samples depending on the sintering conditions were also discussed… The fluorescence spectra of the specimens excited by an 808 nm laser diode (LD) were measured by a spectrograph (EPP2000/EPP2000C, StellarNet, USA). All the optical spectrums were measured at room temperature. 3. Results and discussion.