Analysis Of The Functional Devices Based On Liquid Crystal Infiltrated Tellurite Photonic Crystal Fiber

How to achieve large capacity long-distance transmission and high transmission rate of optical communication system has become a focus in the development of optical communication system. It is necessary to update the optical communication technology and research on related optical devices, such as optical switches, optical filters, wave division multiplexing. Photonic crystal fiber has been widely used because of its flexible structure, variable matrix material and its appearance. It has provided a new direction for the development of optical devices.Based on the excellent properties of photonic crystal fiber, by the tunable optical properties of liquid crystal the polarizer using tellurite photonic crystal fiber filled with liquid crystal is designed. The main contents include:First of all, the history of photonic crystal fiber is reviewed, and the transmission characteristics of photonic crystal fiber are introduced, the advantages of tellurite glass and the development status of photonic crystal fiber polarization device are analyzed;Then, the developments of liquid crystal are introduced briefly and the characteristics of the temperature and electric field are also explored. Numerical calculation formula of liquid crystal properties are given systematically. The numerical analysis method of photonic crystal fiber is summarized, and the finite element method is introduced fully in this paper. A tellurite glass photonic crystal fiber filled with liquid crystal is analyzed, and the birefrigence and the dispersion are studied when its structure is changed;Besides, a grapefruit tellurite glass photonic crystal filled with liquid crystal is used to get polarization rotator. Based on the finite element method, the rotation length,mode field distribution, crosstalk, conversion efficiency and characteristics of the fiber are analyzed. The photonic crystal fiber with good polarization rotation characteristic can been achieved by adjusting the structure parameters of the fiber and changing wavelength, temperature;Finally, a polarization splitter based on hexagonal tellurite glass photonic crystal fiber filled with liquid crystal is proposed. The mode field distribution, birefringence,normalized power, extinction ratio of the fiber are simulated by the finite element method.