The Impact of Temperature on the Transmission Characteristics of Photonic Crystal Fiber Filled Magnetic Fluid

In this paper, according to the refractive index of magnetic fluid variation relationship with temperature, the transmission characteristics of photonic crystal fiber (PCF) filled with the magnetic fluid (MF) were simulated and analyzed using the full-vector finite element method. The major researches were numerical simulation about the temperature affects on the mode field, transmission mode, the effective refractive index and loss of different air hole diameter PCF filled with MF under different wavelengths. The results show that the wavelength, the air hole diameter and the temperature have impacts on the transmission characteristics of the PCF filled with MF. And the longer the wavelength, the larger the diameter of the air hole, the transmission characteristic of the PCF is more significantly affected by temperature. When the temperature change from 20 to 80°C under the input wavelength at 1550nm, the PCF with the air hole diameter of d = 4.5μm, hole spacing Λ=5.6μm maintain the single-mode transmission, the effective refractive index decreases from 1.442451 to 1.441154, the effective mode area reduces from 32.333087μm2 to 28.276072μm2, and the confine loss increases from 37.553468dB/m to 38.103598dB/m (corresponding to the temperature of 25°C), and then decrease linearly to 27.501534dB/m.These characteristics provide the theoretical basis for the temperature controlling light field, and provide new methods, new ideas for temperature measurement and the reference for the design and applications of temperature modulation device based on PCF.