【摘要】 针对基于布里渊散射原理的分布式传感光纤的标定问题,本文研发了一套分布式传感光纤标定系统。利用BOTDR测量仪器,可以标定分布式传感光纤的应变系数和温度系数,并获得=900μm的尼龙紧套单模传感光纤的温度系数和应变系数:分别为2.99 MHz/℃和0.05MHz/με;同时获得BOTDR实测值与真实应变的关系曲线,其相关系数大于0.995。该结果证明,普通通讯用紧套单模光纤可以用作分布式传感光纤,文中的标定方法及标定结果可为分布式传感光纤研究提供重要的研究手段及研究依据。更多还原

【Abstract】 A novel calibration system was developed to calibrate the temperature coefficient and strain coefficient of distributed optical fiber sensor based on Brillouin Optical-Time Domain Reflectometer(BOTDR).A certain type of SM Nylon optical fiber with a diameter of 900μm was tested,the temperature coefficient of(2.99)MHz/℃ and the strain coefficient of 0.05MHz/με were obtained respectively.The correlation curve of the measurement results from BOTDR and the theoretical results was also obtained with a correlation coefficient greater than 0.995.The test results conclude that the tested optical fiber can be used as distributed sensor.The suggested calibration method and the calibration result are useful for the further study of distributed optical fiber sensor.更多还原