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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 pressure and temperature sensing characteristics based on Mach-Zehnder interferometry have been investigated. The self-made all-fiber interferometer was used to measure and analyze the optical power changes caused by the pressure changes under different temperature conditions and the temperature changes under different pressures. The temperature measurement range of the system under no pressure is 39-46 ℃; when the temperature is changed from 40 ℃ to 45 ℃ under the pressure of 1N, the linear sensitivity is -4.078.7nW / ℃ and the linear correlation coefficient is 0.976 6.45 ℃, the sensitivity of optical power to pressure is -1.162 1μW / N, Linear correlation coefficient 0.989 3. The results show that the system has good temperature and pressure detection characteristics in the range of 40 ~ 45 ℃ and 0 ~ 1N.