A fluorescence fiber temperature detection system based on the lifting-wavelet

In this paper, a temperature measurement system based on the fluorescence intensity of the ruby crystal is designed. The fluorescence wavelength-division and time-division multiplexing techniques were applied in this paper. It reduce the excitat ion light leakage, improve the signal to noise ratio and sensitivity depends on the monitoring of the fluorescence emission from pink ruby crystal to measurement temperature. The lifting-wavelet transform was used to eliminate the noise in the fluorescence signal. The result s show that t his system has higher precision and resolution by the temperature experiment. The resolution is that the temperature region is 300–450K, the resolution is±0.4°C, the error of the probe is to be ±3 K and the signal to noise is 25 dB.