A highly sensitive temperature sensor of magnetic fluid (ethanol) using a ring-core-based microstructured optical fiber (MOF) with two large elliptical air holes beside the ring core has been suggested by the finite element method. Highly sensitive magnetic fluid ethanol is injected into the ring core to improve its high sensitivity response. The maximum sensitivity response of 25,641.025 nm/RIU and 10 nm/°C are obtained for the broad operating wavelength of 6500–7000 nm where the temperature range is 10–60°C and the applied magnetic field strength range is 50–200 Oe. Various parameters such as high birefringence, coupling length, power spectrum, transmission, and loss spectra were studied and 14 modes were analyzed in our work. The proposed structure can be further modified and applied in various applications, such as magneto-optic modulators, optical fiber gyroscopes, and switches. The reported MOF structure can easily be fabricated owing to its simplified structure and easy filling of functional materials.

通过有限元方法提出了一种高灵敏度的磁性流体（乙醇）温度传感器，该传感器使用基于环芯的微结构光纤（MOF），在环芯旁有两个大的椭圆形气孔。将高度灵敏的磁性液体乙醇注入环形磁芯，以改善其高灵敏性响应。当温度范围为10-60°C，施加的磁场强度范围为50-200 Oe时，在6500-7000 nm的宽工作波长下，可获得的最大灵敏度响应为25,641.025 nm / RIU和10 nm /°C。研究了高双折射，耦合长度，功率谱，透射率和损耗谱等各种参数，并分析了14种模式。所提出的结构可以进一步修改，并应用于各种应用，例如磁光调制器，光纤陀螺仪和开关。所报道的MOF结构由于其简化的结构和易于填充的功能材料而易于制造。