New low-toxicity inorganic Nd3+-activated liquid medium for lasers

A low-toxicity PBr₃–AlBr₃–SbBr₃ neodymium-activated liquid medium with an absolute quantum efficiency of 83 % and an excited-state lifetime of 230 μsec was developed. The energy characteristics were determined of lasers using this medium in sealed quartz cells with an internal diameter of 18 mm and 100 mm long. The thermo-optic constant of the medium was measured and interferograms of thermal stresses in the cell after a pump pulse were obtained.