中文摘要：

基于能够测量 0.03 阶段度的减法，在正弦曲线之间的限制表明的一种阶段移动解调技术在这份报纸被介绍。一个自我获得模块和实际 subtracter 扮演阶段移动解调系统的内核部分。在不同阶段的电的信号被用来验证系统的性能。另外，新设计光来源，激光纤维微分来源(LFDS ) ，能够产生微型阶段被用来进一步验证系统可靠性。在电的信号的 0.99997 的 R 平方和在 LFDS 的 0.99877 的 R 平方被完成，并且 0.03 度测量限制在实验被认识到。而且，阶段移动解调系统被用于荧光阶段认识到基础的基于的氧传感器工作。试验性的结果揭示那一次好重复并且更好，比 0.02% 氧集中测量，精确性被认识到。另外，阶段移动解调系统能对另外的应用程序容易综合。

英文摘要：

A phase shift demodulation technique based on subtraction capable of measuring 0.03 phase degree limit between sinusoidal signals is presented in this paper. A self-gain module and a practical subtracter act the kernel parts of the phase shift demodulation system. Electric signals in different phases are used to verify the performance of the system. In addition, a new designed optical source, laser fiber differential source （LFDS）, capable of generating mini phase is used to further verify the system reliability. R-square of 0.99997 in electric signals and R-square of 0.99877 in LFDS are achieved, and 0.03 degree measurement limit is realized in experiments. Furthermore, the phase shift demodulation system is applied to the fluorescence phase based oxygen sensors to realize the fundamental function. The experimental results reveal that a good repetition and better than 0.02% oxygen concentration measurement accuracy are realized. In addition, the phase shift demodulation system can be easily integrated to other applications.