Dissertation > Excellent graduate degree dissertation topics show

Research on Transmission Characteristics of Dielectrically Chiral Photonic Crystal Fiber with Bandgap

Author: SuQiYao
Tutor: LiJunQing
School: Harbin Institute of Technology
Course: Optics
Keywords: Photonic crystal fiber Photonic bandgap Dielectric chirality Plane wave expansion method Finite-difference Frequency-domain method
CLC: O436
Type: Master's thesis
Year: 2010
Downloads: 45
Quote: 0
Read: Download Dissertation


Due to the promising application in optical communication, photonic crystal fiber (PCF) with some unique properties arouses more and more attentions recently. In fact, most of existing PCF are fabricated by achiral material while chiral PCF do not received adequate emphasis. In this thesis, a concept of dielectrically chiral PCF with bandgap is proposed. By using numerical simulations, the effects of chirality are investigated on the photonic bandgap and guidance characteristics.In this thesis, two current algorithms, namely the plane wave expansion (PWE) method and the Finite-difference Frequency-domain (FDFD) method, are improved and applied to photonic structure with dielectric chirality. Through two typical examples, namely the chiral fiber and index-guided PCF, two above methods are proved. The improved FDFD method may be utilized to study a regular chiral waveguide with arbitrary structure. The improved PWE method has two forms: the conventional chiral PWE method and the chiral PWE method for waveguide, the former is suitable for the PCF with bandgap structure, while, by incorporating the supercell approximation, the latter can be used to study simple chiral PCF.By using the chiral PWE method, the effects of chirality are investigated on the mode distribution, polarization distribution, bandgap width and effective indices in the cladding. Based on two structures with triangular lattices and honeycomb lattices, the eigenmodes are calculated for specific wave vector directions, the circularly polarized modes are found, and the phenomenon of suppression of bandgap width arising from chirality is analyzed.Based on the chiral FDFD method, the hollow PCF with triangular lattices and the PCF with honeycomb lattices of bandgap type are simulated. The polarization characteristics, effective indices and confinement loss are discussed. A mechanism of bandgap guidance in chiral PCF is validated. In the two types of PCF mentioned above, guided modes with quite pure circular polarization are revealed. Based on the difference in loss and indices for right-/left-handed circularly polarized modes, a possibility of selective transmission is discussed for a given circular polarization.

Related Dissertations

  1. Study on the Influence of Various Defects on the Characteristics of Infrared Photonic Crystal Fiber,TN253
  2. Study on a New Two-dimensional Photonic Crystal Ring Resonator and Its Application,O734
  3. Studies on Controlled Air Hole Collapse in Photonic Crystal Fiber,TN253
  4. Micro-Cavity Design and Characteristics Research of Photonic Crystal Based on Tunable Refractive Index,O734
  5. Characteristics of Complete Bandgap of Two Dimensional Annular Photonic Crystal,O734
  6. The Design of the Mircostrip Antenna Based on the Photonic Band Gap Structure and the Dual-band Mircostrip Antenna,TN822
  7. Study on Characteristics of Photonic Crystal Fibers and Its Application in Optical Filter,TN929.11
  8. Research on Sensing Properties of Photonic Crystal Fiber Grating,TN253
  9. Large-Ratio Stretcher for Ultra-Short Pulses Using Photonic Crystal Fiber,TN253
  10. Theoretical Analysis and Investigation of the Photonic Crystal Fiber for Fiber Optic Gyroscope Application,TN253
  11. Research on Nonlinear Property of Erbium Doped PCF and Germanium Doped PCF,TN253
  12. Research on Dispersion of Photonic Crystal Fiber,TN253
  13. Research on Propagation Characteristics of Index-guiding Terahertz Photonic Crystal Fibers by the Finite Element Method,TN252
  14. The Study on Theory and Experiment of Photonic Crystal Fiber and PCF’s Endface,TN253
  15. The Theoretical and Experimental Study of Supercontinuous Spectrum in Photonic Crystal Fibers,TN253
  16. Study on Dispersion Compensation Property in Photonic Crystal Fibers,TN253
  17. Experimental Study on Photonic Crystal Fiber Source of Quantum Correlated Photon Pairs in Telecom Band,O431.2
  18. Study on the Nonlinear Parametric Process in Photonic Crystal Fiber,TN253
  19. The Application and Preparation Craft of the Photonic Crystal Fiber(PCF),TN253
  20. Numerical and Experimental Study on Coherent Combining of Double Cladding Multi-Core Photonic Crystal Fiber,TN253
  21. Research on Sensoring Mechanism of Liquid-crystal Photonic Crystal Fiber,TN253

CLC: > Mathematical sciences and chemical > Physics > Optics > Physical optics ( wave optics )
© 2012 www.DissertationTopic.Net  Mobile