中文摘要：

光纤的 Fabry-Perot 洞长度的一个新解调算法基于阶段，产生搬运人(PGC ) 在这份报纸被建议，它能在高温度的压力传感器中被使用。这个新算法由利用一个光系统基于弧正切功能输出二个直角的信号，它基于地可编程的门数组(FPGA ) 被设计克服原来的 PGC 弧正切函数解调算法的范围限制。模拟和分析也被继续。根据解调的分析，速度和精确，采样点的不同数字的模拟，和测量压力传感器结果，弧正切功能解调方法有好解调结果：单个数据和在 Fabry-Perot 高温度的压力传感器的光纤的 Fabry-Perot 洞长度解调显示出实际可行性的不到 1% 错误的 1 MHz 处理速度。

英文摘要：

A new demodulation algorithm of the fiber-optic Fabry-Perot cavity length based on the phase generated carrier （PGC） is proposed in this paper, which can be applied in the high-temperature pressure sensor. This new algorithm based on arc tangent function outputs two orthogonal signals by utilizing an optical system, which is designed based on the field-programmable gate array （FPGA） to overcome the range limit of the original PGC arc tangent function demodulation algorithm. The simulation and analysis are also carried on. According to the analysis of demodulation speed and precision, the simulation of different numbers of sampling points, and measurement results of the pressure sensor, the arc tangent function demodulation method has good demodulation results： 1 MHz processing speed of single data and less than 1% error showing practical feasibility in the fiber-optic Fabry-Perot cavity length demodulation of the Fabry-Perot high-temperature pressure sensor.