A Novel Highly Birefringent PCF Based On Lattice Structure Of Elliptic Layer

Since the 1990 s, photonic crystal fiber(PCF) has aroused great attention in the crystal fiber transmission field. Photonic crystal fiber is a new type of transmission fiber, has various of advantages above the traditional optical fiber. It has characteristics of high birefringence, low confinement loss, controllable chromatic dispersion and high nonlinearity. This paper proposes a novel photonic crystal fiber based on a elliptical cladding structure. In this paper, we study the fiber birefringence and the confinement loss. Based on filling different thermal material into the air holes in cladding, we study the effect of temperature-varying changes on the characteristic parameters. We use the new PCF filling with ethanol to manufacture temperature sensors. In this paper, we study as follows.(1) In the first chapter, we introduced the producing and development of photonic crystal fiber. We discuss the classification of photonic crystal fiber, and the production process. We did research on the various parameters in photonic crystal fibers, such as the effective refractive index, birefringence, confinement loss, dispersion characteristics. Finally we introdce the application of photonic crystal fiber in sensors field.(2) In the second chapter, we introduced various theoretical analysis method of photonic crystal fiber; introduction the use of COMSOL and Matlab software, which used in analyzing the properties of the new photonic crystal fiber.(3) In the third chapter, we proposed a new type of photonic crystal fiber based on elliptical cladding and used the multipole method to analysis the characters in the fiber. Through changing different parameters such as ellipticity and quantity of cladding, we research the fiber birefringence, confinement loss and mode field characteristics.(4) In the last two chapters, through filling thermal fluid into the air holes in the photonic crystal fiber, we study how changing temperature effect the character of PCF; We discuss birefringence and confinement loss in photonic crystal fiber while changing the temperature of filling ethanol. We analysis using the inner cladding filled how affect structural changes; Finally, we briefly discussed the transmission characteristics of Sagnac temperature interferometer. based on the photonic crystal structure.