Sökning: "Grating"

Visar resultat 1 - 5 av 109 avhandlingar innehållade ordet Grating.

  1. 1. High efficiency grating-coupled surface-emitting semiconductor lasers

    Författare :Niklas Eriksson; Chalmers University of Technology; []
    Nyckelord :diffraction grating; chemically assisted ion beam etching; blazed grating; integrated optics; multilayer substrate reflector; semiconductor laser; grating-coupled surface-emitting laser; electron-beam lithography; waveguide grating coupler; nenofabrication;

    Sammanfattning : .... LÄS MER

  2. 2. Electromagnetic simulation and design of etched diffraction grating demultiplexers

    Författare :Jun Song; Sailing He; Dries Van Thourhout; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; etched diffraction grating; wavelength division multiplexing; passive devices; diffraction grating; planar waveguide devices; DWDM; optical communication.; Photonics; Fotonik;

    Sammanfattning : Among various planar lightwave circuits for multiplexing/demultiplexing in an optical communication system, etched diffraction gratings (EDGs) have shown great potential due to their compactness and high spectral finesse. Conventional numerical methods for grating simulation cannot be used to simulate an EDG demultiplexer of large size (in terms of the wavelength). LÄS MER

  3. 3. Study on electroabsorption modulators and grating couplers for optical interconnects

    Författare :Yongbo Tang; Urban Westergren; Dries Van Thourhout; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photonic integrated circuit; optical interconnect; transmission line; traveling-wave; electro-absorption modulator; hybrid silicon evanescent platform; grating coupler; vertical coupling scheme; optical antenna; lag effect; polarization beam splitter; Photonics; Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Decades of efforts have pushed the replacement of electrical interconnects by optical links to the interconnects between computers, racks and circuit boards. It may be expected that optical solutions will further be used for inter-chip and intra-chip interconnects with potential benefits in bandwidth, capacity, delay, power consumption and crosstalk. LÄS MER

  4. 4. Photonic devices with MQW active material and waveguide gratings : modelling and characterisation

    Författare :Nadeem Akram; Lars Thylén; Hartmut Hillmer; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Method of Lines; Grating; ARROW Waveguide; Semiconductor laser; quantum well; Photonics; Fotonik;

    Sammanfattning : The research work presented in this thesis deals with modelling, design and characterisation of passive and active optical waveguide devices. The rst part of the thesis is related to algorithm development and numerical modelling of planar optical waveguides and gratings using the Method of Lines (MoL). LÄS MER

  5. 5. Focusing circular grating-coupled surface-emitting lasers

    Författare :Sigurgeir Kristjánsson; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; integrated optics; semiconductor lasers; grating coupled surface emitters; laser resonators; circular gratings;

    Sammanfattning : .... LÄS MER