title: Diffraction engineering of multimode waveguides using computer-generated planar holograms.
abstract: The self-imaging property in multimode waveguides is related to the waveguide widths and lengths. By engineering the diffraction properties of multimode waveguides, we propose a scheme to design devices with reduced self-imaging lengths at a fixed width. Using computer-generated planar holograms, the coupling coefficients between the guided modes are adjusted to generate the desired diffraction properties. Calculations based on the coupled-mode theory are presented. Devices are designed based on a silicon-on-insulator (SOI) platform. Beam propagation simulations are used to verify the coupled-mode theory analysis.
authors.affiliation: Department of Electro-Optical Engineering, National Cheng Kung University, Tainan, Taiwan. tsengsy@mail.ncku.edu.tw
authors.forename: Shuo-Yen
authors.initials: SY
authors.lastname: Tseng
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D006696:Holography / Q000295:instrumentation / Q000379:methods*; D015233:Models, Statistical; D055096:Optical Devices; D055095:Optics and Photonics; D012031:Refractometry; D012542:Scattering, Radiation; D012984:Software