Design and characteristic of coupling-type hetero-structure photonic crystal waveguide power splitter

• Main Author: 陳鴻祺
• Other Authors: 李柏璁
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/25644861436846029535

碩士 === 國立交通大學 === 光電工程系所 === 94 === In this thesis, the goal is to design a short length and high power transmission photonic crystal power splitter. At first, the simulation is performed by using two-dimensional plane-wave-expansion (PWE) method to calculate the band diagram and the defect mode. According to the simulations, we can find the optimized structure, and the fabrication of the structure is introduced. Then, the coupling mechanism is used to calculate the coupling length. And the coupling-type hetero-structure photonic crystal waveguide power splitter is good choice to get high power transmission and short coupling length. Finally, we use finite-difference time-domain (FDTD) method to simulate the wave propagation in the photonic crystal waveguide power splitter. Hence the power transmission versus wavelength is obtained, and we can find the maximum power transmission and the corresponding wavelength in this structure. We measured the single-line defect photonic crystal waveguide with r/a ratio 0.3. Initial measurement results are obtained, and we can find some agreement between the measured data and the simulation result.