The Study of Wavelength Division Mutliplexing with Optical Waveguide

• Main Authors: Tian-Ren Chen, 陳天仁
• Other Authors: Yaw-Dong Wu
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/34798908637883668149

碩士 === 國立高雄應用科技大學 === 電子與資訊工程研究所碩士班 === 95 === In this study‚ it discussed the properties of 2D photonic crystal. The central reason is that photonic crystal structures are suitable for a large number of optical application. By using the properties of the defect and plane-wave expansion method and finite-difference time-domain method, we attempt different structure to separate different wavelength in two waveguides. A photonic crystal is a revolutionary class of artificially periodic electromagnetic media‚ in which a fundamentally new electromagnetic phenomenon can be achieved. A photonic bandgap defines that light is forbidden to exist inside the crystal in the range of frequencies. Breaking the crystal periodicity offers new possibilities to engineer the light propagation and allows us to realize high performance ultra-compact optical devices; as an example‚ line defects in a photonic crystal with a photonic bandgap are low loss optical waveguides and they guide electromagnetic waves with a high efficiency. Photonic bandgap structure can be also used to realize optical resonators and filters for wavelength division multiplexing networks. We adopt some properties of photonic crystal to design this structures. For instance, we discussed the design of the defect region in the photonic crystal waveguide and demonstrated the effect of a defect changing. By the different properties to design different device about 1310 nm/ 1550 nm demultiplexer. It is found that the lights of different wavelength enter waveguide of input and the lights will export different waveguide of output.