In solid-state laser systems with nanosecond repetition rates and high energy, amplified spontaneous emission (ASE) and parasitic oscillation (PO) produced by the gain material can significantly impact the laser output. A well-designed cladding composite structure is an effective solution to absorb ASE and suppress PO. In this work, 5 at.% Sm:LuAG transparent ceramics, a promising cladding material for suppressors of PO at 1064 nm of Nd:LuAG lasers, have been prepared by solid-state reactive sintering at 1825 °C followed by hot isostatic pressing (HIP) post-treatment at 1750 °C. The influences of TEOS (tetraethyl orthosilicate) content on microstructure evolution, in-line transmittance of... More >