【摘要】 采用紫外光固化技术将聚合物双微椭球固着在光纤锥上制备光纤温度和磁场传感结构。聚合物双微椭球由磁性和非磁性微椭球构成。光纤锥的长度为0.8 mm,2个聚合物微椭球在长轴和短轴方向的长度分别为0.4 mm和0.2 mm,2个聚合物微椭球间多模光纤长为0.2 mm。入射光分别在光纤锥和聚合物微椭球中向前传输，并在光纤锥的另一侧叠加形成干涉谱。利用波长解调技术研究该结构的传感特性。实验结果表明：磁场强度范围为5～35 mT时，该结构干涉谱中两干涉峰的磁场灵敏度分别为0.077 27、0.067 45 nm·mT^-1；温度在30～60℃范围时，两干涉峰的温度灵敏度分别为0.228 73、0.161 62 nm·℃^-1，利用传感矩阵方法实现温度和磁场的同时传感探测。更多还原

【Abstract】 In this paper,a fiber temperature and magnetic field sensing structure was prepared by integrating two polymer micro-ellipsoids on the fiber taper.Fiber taper was prepared by the method of melting pull,and the length of fiber taper is 0.8 mm.The two polymer micro-ellipsoids,which consist of magnetic micro-ellipsoid and non-magnetic microellipsoid,were integrated with fiber taper using ultraviolet curing technique.The lengths of two polymer micro-ellipsoids in the long axis and short axis are 0.4 mm and 0.2 mm,respectively.The length of exposed fiber taper between magnetic and non-magnetic micro-ellipsoids is 0.2 mm.There are multiple interference peaks in the transmission spectrum with different responses to the temperature and magnetic field.Peak A and peak B were measured in details.The magnetic field sensitivities of peak A and peak B are 0.077 27 nm·mT^-1and 0.067 45 nm·mT^-1in the range of 5～35 mT;and the temperature sensitivities of the peak A and peak B are 0.228 73 nm·℃^-1and 0.161 62 nm·℃^-1between 30℃and60℃respectively,The simultaneous measurement of temperature and magnetic field can be achieved by using the method of the sensitivity matrix.Due to the low cost,easy fabrication and high sensitivity,the sensor will have an important application prospects in biochemical,industrial and other fields.更多还原