| Summary: | 碩士 === 明新科技大學 === 電子工程研究所 === 102 === Periodic dielectric waveguide (PDWG) is a periodically distributed pillar structure, which has only one row of dielectric rods and can achieve high light transmission. and therefore It occupies small area, and can achieve low-loss energy transfer under arbitrary angles. PDWG is a new concept of photonic control method in recent years.
This study introduces characteristics and analysis methods of PDWGs, which were used to design straight waveguides, bending waveguides, and ring resonators. We explore the effects of various parameters on the transmission efficiency of straight waveguides. Bby changing the angles of the bending waveguides, we discuss its effect on transmission efficiencies. Ring resonator has a filter function. Because there are many different parameters, we need to investigate the effects and characteristics of various structural parameters.
This information is used to design a ring resonator demultiplexer. The coupling efficiency under its communication wavelength is simulated by finite-difference time-domain (FDTD) method. The demultiplexer we designed can split wavelength of 1.31 μm and 1.55 μm. Its distinction ratio is more than 20dB.
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