中文摘要：

设计了一个完整的光纤气体测量系统，提高了检测SO2浓度精确度和读取时间。光路检测系统和分配系统相结合，用于实现在气体传感系统中光谱吸收检测技术和荧光检测技术的有效集成，从而可以扩大本仪器的应用领域和测量范围。光源调制锁定检测技术和双光路差检测技术也被结合在该系统中。在测量吸收光信号和荧光信号中，使用高精度空心光子带隙光纤传感探头，实现了较高的精度和灵敏度。实验数据和测量的结果表明，该系统具有较高的分辨率，大约为2ppm，并且误差小于0．109。

英文摘要：

A full optical fiber gas measuring system which could make high accuracy and read time detect on the concentration of SO2 was designed. The light path detecting system and distribution system were combined to realize the efficient integration of spectrum absorption detecting technology and fluorescence detecting technology in this gas sensing system, which could expand the application domain and measuring extent of this instrument. The light-source modulation locking detecting technology and double light-path difference detecting technology were also combined in this system. The high accuracy hollow photon band gap optical fiber sensing probe was adopted to realize the high accuracy and sensitivity measuring on absorption light signal and fluorescence signal. Experiment data and measuring results show that this system has high resolution of about 2 ppm and error less than 0.109.