Search for dissertations about: "grating couplers"

Showing result 1 - 5 of 20 swedish dissertations containing the words grating couplers.

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

    Author : Yongbo Tang; Urban Westergren; Dries Van Thourhout; KTH; []
    Keywords : 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;

    Abstract : 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. READ MORE

  2. 2. Multifunctional Waveguide Grating Couplers for Integrated Optics

    Author : Johan Backlund; Chalmers University of Technology; []
    Keywords : ;

    Abstract : This thesis describes a novel waveguide component in integrated optics called a multifunctional grating coupler. It couples light in or out of optical waveguides and provides additional optical functions such as beam splitting, arbitrary focusing, polarization sensing, and wavelength separation (wavelength division demultiplexing). READ MORE

  3. 3. Horizontal Slot Waveguides for Silicon Photonics Back-End Integration

    Author : Maziar A. M. Naiini; Mikael Östling; Jörge Schulze; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon photonics; slot waveguides; grating couplers; CMOS tech- nology; high-k; ALD; germanium photodetectors; graphene photodetectors; pho- tonic integrated circuits;

    Abstract : This thesis presents the development of integrated silicon photonic devices. These devices are compatible with the present and near future CMOS technology. High-khorizontal grating couplers and waveguides are proposed. READ MORE

  4. 4. Grating-Coupled Surface-Emitting Lasers -- Circular and Unstable-Resonator Geometries

    Author : Sigurgeir Kristjánsson; Chalmers University of Technology; []
    Keywords : laser beam focusing; grating coupled surface emitters; simulation; unstable resonator lasers; surface-emitting lasers; integrated optics; gratings; circular gratings; BPM simulations; laser resonators; semiconductor lasers; optical planar waveguide couplers; electron beam lithography;

    Abstract : This thesis deals with research in the field of grating-coupled surface-emitting lasers. The emphasis has been to study the modal behavior of lasers with two different resonator geometries: circular resonators and tapered unstable-resonators. READ MORE

  5. 5. Integrated Nanophotonic Devices in Lithium Niobate

    Author : Mohammad Amin Baghban; Katia Gallo; Fabrice Raineri; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Lithium niobate LN ; LN-on-insulator; photonic integrated circuits; nonlinear optics; electro-optics; waveguides; propagation losses; Bragg gratings; grating couplers; polarization-insensitive; LN for life sciences; Physics; Fysik;

    Abstract : Lithium niobate (LN) is a ferroelectric crystal offering a broad transparency spectrum, together with excellent electro-optic and nonlinear optical properties. Thanks to them, LN is setting the standard for quantum optics and telecommunications in critical applications such as ultrafast modulation and frequency conversion. READ MORE