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The Dispersion Analysis And High Birefringence Structure Design Of Photonic Crystal Fibers

Posted on:2008-07-30Degree:MasterType:Thesis
Country:ChinaCandidate:J HeFull Text:PDF
GTID:2178360242472259Subject:Optical Engineering
Abstract/Summary:PDF Full Text Request
Photonic crystal fiber (PCF) is a new type of optical fiber. Because of its special optical properties, PCF has been a focus in optical fiber area in recent years.This paper introduces the research background and current development of PCF, analyzes its structure characteristics, enumerates some different structures of PCF, and simply presents its two kinds of transmission principle and manufacture, as well as its application in various aspects. Based on the previous research, this paper calculates the characteristics of PCF with Finite Element Method, summarizes the theory of Finite Element Method and discusses the process of dealing PCF with vector and scalar. We emphatically analyzed dispersion and birefringence characteristics, and designed PCF with high birefringence.In this paper, we systematically discussed the optical characteristics and model field distribution of PCF, and analyzed some parameters such as effective refractive index of fundamental mode, dispersion, birefringence, polarization and so on. By adjusting the diameter (d) of air hole, the distance A between cladding air holes, and the refractive index (n) of stuffing medium, we can control the dispersion of PCF. We can realize the movement of zero dispersion wavelength from long wave to short wave, or even to visible light area; further more, flatness and level of dispersion can also be controlled. At the same time, by adjusting the refractive index(n) of medium in cladding radial core, diameter (d) of air hole and the distance A between cladding air holes, we can also control birefringence of Photonic Crystal Fiber. It can significantly enhance the birefringence phenomena; even can reach a result with a higher order of magnitude than the normal fiber does. Therefore, the Photonic Crystal Fiber with high birefringence phenomena can be designed. This paper also compares dispersion and birefringence between periodically square round hole of PCF and triangle round hole of PCF. These results provide the theoretical base for the design and production of the Photonic Crystal Fiber.
Keywords/Search Tags:Photonic Crystal Fibers, Finite Element Method, dispersion, birefringence
PDF Full Text Request
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