Search for dissertations about: "grating couplers"

Showing result 11 - 15 of 24 swedish dissertations containing the words grating couplers.

  2. 11. Design, Fabrication, and Characterization of Nano-Photonic Components Based on Silicon and Plasmonic Material

    Author : Liu Liu; Lars Thylén; Roe Baets; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nano-photonics; finite-difference time-domain method; finite-difference mode solver; amorphous silicon; silicon nanowire; arrayed waveguide grating; photonic crystal; Photonics; Fotonik;

    Abstract : Size reduction is a key issue in the development of contemporary integrated photonics. This thesis is mainly devoted to study some integrated photonic components in sub-wavelength or nanometric scales, both theoretically and experimentally. READ MORE

  4. 12. Technology for photonic components in silica/silicon material structure

    Author : Lech Wosinski; KTH; []
    Keywords : silica-on-silicon technology; PECVD; plasma deposition; photonic integrated circuits; planar waveguide devices; UV Bragg gratings; photosensitivity; arrayed waveguide gratings; multimode interference couplers; add-drop multiplexers;

    Abstract : The main objectives of this thesis were to develop a lowtemperature PECVD process suitable for optoelectronicintegration, and to optimize silica glass composition forUV-induced modifications of a refractive index in PECVDfabricated planar devices. The most important achievement isthe successful development of a low temperature silicadeposition, which for the first time makes it is possible tofabricate good quality low loss integrated components whilekeeping the temperature below 250oC during the entirefabrication process. READ MORE

  5. 13. 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. 14. Fabrication and Characterization of Integration Compatible Semiconductor Lasers

    Author : Mats Hagberg; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis deals with the fabrication and characterization of integration compatible semiconductor lasers. An extensive investigation of electron-beam lithography (EBL) and chemically assisted ion beam etching (CAIBE) for the fabrication of vertical ultra- high quality facets in GaAs, as well as a systematic characterization of grating coupled surface emitting lasers is presented. READ MORE

  7. 15. Waveguide structures for efficient nonlinear optical conversion and distributed-feedback laser resonators

    Author : Cristine C. Kores; Fredrik Laurell; Azzedine Boudrioua; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optics and Photonics; Optik och fotonik;

    Abstract : Integrated optical devices enable the development of miniaturized componentswith increased functionality, mechanical stability, robustness and reducedcost. Integrated devices that generate, manipulate and detect light enable opticalsystems that could not be implemented otherwise, at the vanguard ofboth technology and fundamental research. READ MORE