Title page for etd-0626110-233520


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URN etd-0626110-233520
Author Chih-fu Chang
Author's Email Address No Public.
Statistics This thesis had been viewed 5563 times. Download 1165 times.
Department Electrical Engineering
Year 2009
Semester 2
Degree Ph.D.
Type of Document
Language English
Title The Study and Analysis of Multi-channel Multiplexing System in Photonic Crystal Structures
Date of Defense 2010-06-22
Page Count 131
Keyword
  • Wavelength-Division-Multiplexing
  • Time-Division-Multiplexing
  • Ring Resonator
  • Photonic crystals
  • Abstract Photonic crystals (PCs) are nano-structured materials in which a periodic variation of the dielectric constant of the material results in a photonic band gap. By introducing defects into PCs, it is possible to build waveguides that can channel light along certain paths. It is also possible to construct micro-cavities that can localize photons in extremely small volumes. In this dissertation, to begin with, we computed the photonic crystals dispersion relations and found the photonic band gap (PBG) by the plane wave expansion method (PWE) in the frequency domain. Then, the finite difference time domain method (FDTD) along with the perfectly matched layer boundary conditions was adopted to solve Maxwell’s equations, equivalent to simulate the movement behavior of the Photonic crystals. By properly varying the size of the defect on the PCs, it could really drop the particular wavelengths and guide them to output channels by PCs waveguides. We proposed the structures that would function as Wavelength-Division-Multiplexer (WDM). Secondly, coupled cavity waveguide of PC was used to control group velocity that achieved the slow light property. By calculating dispersion curve with PWE, we obtained group velocity characteristics in PCs waveguide. Meanwhile, we designed a novel Time-Division-Multiplexer (TDM) system by controlling the group velocity characteristics. Finally, we designed cascade ring resonators and expected to obtain an extendable delay line. Conventional delay line devices are propagating in a long waveguide to obtain the delay line property. An excellent delay line and ultra-small size properties are expected in the proposed structure. Because nano-technology has been making great progress steadily, it surely can be used to demonstrate a practical breakthrough in which the devices based on the PC integrated circuits are realized. These devices will be a potential key component in the applications of ultra-high-speed and ultra-high-capacity optical communications and optical data processing systems.
    Advisory Committee
  • none - chair
  • none - co-chair
  • none - co-chair
  • Yaw-Dong Wu - advisor
  • Chih-Wen Kuo - advisor
  • Mao-Hsiung Chen - advisor
  • Files
  • etd-0626110-233520.pdf
  • indicate accessible in a year
    Date of Submission 2010-06-26

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