Investigation of bending multimode interference demultiplexer with coherently-coupled effect

• Main Authors: Cyun-Jing Lin, 林群璟
• Other Authors: Wei-Yu Lee
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/35398044424280531411

碩士 === 中華技術學院 === 機電光工程研究所碩士班 === 97 === The optical waveguide integrated optical components with curved forms are part of the waveguide at present. Therefore the components design of the bending form of waveguide is particularly important. The bending waveguide is designed to focus on wide-angle and low-loss. The angle of bending for the traditional design of bending waveguide has to be restricted to less than 2 °. There will be a serious loss of radiation modes if angle is too large. This paper is interpreting to use coherently-coupled transfer mode to improve the above-mentioned defects. This paper is interpreting to use Beam Propagation Method (BPM) to simulate analysis and design and to use Coherently-Coupled Transfer mode and Multi-Mode interference structure to design bending-type demultiplexer components. When the input light, respectively, for the 1.55μm and 1.31μm wavelength and the bend angle of 5 °, the efficiency of transmission of those two wavelengths is more than 94%.