基于全光纤马赫-曾德尔干涉仪的压力和温度传感实验

Testing of Pressure and Temperature Sensor Based on All Fiber Mach-Zehnder Interferometer

对基于马赫-曾德尔干涉技术的光纤压力和温度传感特性的进行了研究。利用自制的全光纤干涉仪,对不同温度条件下的压力变化和不同压力下的温度变化引起的光功率的变化进行了测量和分析,给出该系统在无压力时温度测量范围是39~46℃;1N压力下,温度在40~45℃变化时,温度线性灵敏度为-4 078.7nW/℃,线性相关系数为0.976 6。45℃时,光功率随压力变化灵敏度为-1.162 1μW/N,线性相关系数0.989 3。结果表明系统在40~45℃和0~1N范围内,具有较好的温度和压力检测特性。

Fiber optic pressure and temperature sensing system are investigated based on Mach-Zehnder interferometer technology.Using all-fiber interferometer system,the variation of the optical power with pressure changing under various temperature conditions and temperature changing under the condition of pressure is measured and analyzed.The results show that the system's temperature measurement range is 39~46 ℃in the absence of pressure and the system's temperature sensitivity is 4 078.7nW/℃ when the temperature changes from 40 to 45℃ under 1Npressure.It has high temperature sensitivity and good linear relationship when it is 45℃,the sensitivity of optical power changing with pressure is 1.162 1μW/N,the linear correlation coefficient is 0.989 3.Thus,it has better testing results of pressure and temperature in the range of 40~45 ℃ and 0~1Nindividually.