To measure the temperature range from room temperature to 1 000℃,a sapphire-ruby fiberbased multi-probe thermometer was proposed.The thermometer system combines fluorescence lifetime with radiationand,which can measure the temperature of 8probes at the same time.A digital iteration algorithm based on area balance was presented to measure the fluorescence lifetime.Compared with the Fast Fourier Transformation algorithm through simulation,the proposed algorithm features robust,high efficiency,strong anti-nois...