Preparation and laser performance of Nd-doped yttrium lanthanum oxide transparent ceramic

摘要

1,5 at.% Nd:Y_(1.8)La_0.2)O_3 transparent ceramic was fabricated by a solid-state reaction method and sintered at 1650-1700 °C for 40-50 h under H2 atmosphere. The spectroscopic properties were investigated at room temperature. The transparent ceramic has excellent spectroscopic properties, with the absorption cross section of 1.50 x 10~(20)cm~2 and broad full width at half maximum (FWHM) of about 8 nm at LD wavelength 806 nm, the emission cross section of 2.03 x 10~(20) cm~2 at 1079 nm, and the decay lifetime of 200 μs. Laser performance was carried out using an uncoated Nd:Y_(1.8)La_0.2)O_3 ceramic plate under laser diode end-pumping without any water cooling device. The room temperature thermal conductivity of this ceramic is 6.20 W/mK. For Nd:Y_(1.8)La_0.2)O_3 ceramic laser, a maximum output power of 62 mW was obtained at 1079 nm under a 808 nm diode pump.