Laminar-Structured YAG/Nd:YAG/YAG Transparent Ceramics for Solid-State Lasers
Abstract:A laminar-structured YAG/1.0 at.% Nd:YAG/YAG transparent ceramic was fabricated by a solid-state reaction method and vacuum sintering using high-purity α-Al2O3, Y2O3, and Nd2O3 as raw materials with tetraethoxysilane as a sintering aid. The microstructure, the optical property, and the laser performance of the ceramic composite prepared were investigated in this paper. It is found that the sample exhibits a pore-free structure and the average grain size is about 15 m. There is no secondary phase both at the grain boundary and at the grain matrix. The optical transmittance of the sample (5.0 mm thick) is 80.2% at 1064 nm. The lasing sample is 16.2 mm × 5.0 mm in size, mirror polished on both sides and without a coating. A laser diode (808 nm) was used as a pump source with a maximum output of about 1000 mW, and the end-pumped laser experiment was demonstrated. With 658 mW of maximum absorbed pump power, a laser output of 8 mW has been obtained with a slope efficiency of 4.0%.
Document Type: Research Article
Affiliations: Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Publication date: July 1, 2008