Search for dissertations about: "waveguide"

Showing result 16 - 20 of 236 swedish dissertations containing the word waveguide.

  2. 16. Waveguide holograms for integrated optics : design and application to fiber coupling

    Author : Johan Backlund; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polarization; optical fiber coupling; waveguide holograms; waveguide components; integrated optics; grating couplers;

    Abstract : .... READ MORE

  4. 17. Design, Simulation and Characterization of Some Planar Lightwave Circuits

    Author : Yaocheng Shi; Anand Srinivasan; Sailing He; Daniel Erni; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; planar lightwave circuit; waveguide; coupler; multimode interference; photonic crystal waveguide; de multiplexer; triplexer; polarization beam splitter; dry etching; carrier life time.; Photonics; Fotonik;

    Abstract : Optical devices based on planar lightwave circuit (PLC) technology have the advantages of small size, high reliability, possibility for large scale production, and potential integration with electronics. These devices are widely employed in optical telecommunications, sensing, data storage, imaging, and signal processing. READ MORE

  5. 18. Designs and simulations of silicon-based microphotonic devices

    Author : Daoxin Dai; Sailing He; Siegfried Janz; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; waveguide; silicon-on-insulator SOI ; arrayed waveguide grating AWG ; Elektronik; Electronics; Elektronik;

    Abstract : The characteristics of a silicon-on-insulator (SOI) rib waveguide, including the bending loss of a multimode bent waveguide and the birefringence of a rib waveguide, are analyzed by using a finite-difference method (FDM). Based on a detailed analysis for a multimode bent waveguide, an appropriately designed multimode bent waveguide for reducing effectively the bending loss of the fundamental mode is realized. READ MORE

  6. 19. Topology optimization of antennas and waveguide transitions

    Author : Emadeldeen Hassan; Martin Berggren; Daniel Noreland; Eddie Wadbro; Mats Gustafsson; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; topology optimization; antennas; waveguide transition; finite-difference time-domain; gradient-based optimization; adjoint-field problem; microwave devices.; business data processing; administrativ databehandling;

    Abstract : This thesis introduces a topology optimization approach to design, from scratch, efficient microwave devices, such as antennas and waveguide transitions. The design of these devices is formulated as a general optimization problem that aims to build the whole layout of the device in order to extremize a chosen objective function. READ MORE

  7. 20. Waveguide slot antennas with cylindrical outer structures

    Author : Johan Wettergren; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cylindrical structures; arbitrary cross sections; waveguide slots; two-dimensional solutions; slot admittance; cylindrical antennas; moment method; slot antennas; spectral domain; cylindrical geometries;

    Abstract : .... READ MORE