| Summary: | 碩士 === 國立高雄應用科技大學 === 電子工程系 === 97 === In this study, we discussed the properties of microring coupled resonator optical waveguides. We analyze the microring coupled resonator optical waveguides. Microring coupled resonator optical waveguides mean that the optical wave in the straight waveguide will be partially coupled into the circular waveguide. By using the properties of the microring coupled resonator optical waveguide, plane-wave expansion method and finite-difference time-domain method, the new all-optical delay line device, logic gate device and beam splitter device are proposed.
Firstly, we demonstrate a new all optical delay line structure by using the special arrangement of microring resonator waveguides to change wave propagation direction. We clearly obtained that the novel structure’s delay time is 2.91 ps, its power transmission is 97% and its operating wavelength is at 1.55 μm Second, we demonstrate new all optical logic gate structures including Not, Or, And, Nor and Nand gate by using symmetrical microring coupled resonator waveguides to control interference between straight waveguides and microring coupled resonator optical waveguides. Finally, we demonstrate a new all optical beam splitter structure by using special waveguides width to split TE and TM mode.
The numerical results show that the proposed structures really could function as an all-optical delay light device, logic gate devices, and an all-optical beam splitter device. These would be potential key component in the applications of ultra-high-speed and ultra-high-capacity optical communications and optical data processing systems.
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