Search for dissertations about: "infrared communications"

Found 4 swedish dissertations containing the words infrared communications.

  2. 1. Signaling for Optical Intensity Channels

    Author : Johnny Karout; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lattice codes; mutual information; intensity modulation; noncoherent communications; Direct detection; sphere packing.; infrared communications; free-space optical communications; fiber-optical communications;

    Abstract : With the growing popularity of social media services, e-commerce, and many other internet-based services, we are witnessing a rapid growth in the deployment of data centers and cloud computing platforms. As a result, the telecommunications industry has to continue providing additional network capacity to meet the increasing demand for bandwidth. READ MORE

  4. 2. Modulation Optimization for Noncoherent Optical Systems

    Author : Johnny Karout; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Direct detection; noncoherent communications; lattice codes; mutual information; fiber-optical communications; intensity modula- tion; sphere packing.; infrared communications; free-space optical communications;

    Abstract : There has been a significant improvement in high-speed electronics and optical components over the past few years, and this is one of the key enabling factors for high data rate transmission. Moreover, multi- level modulation formats, which encode information onto the carrier’s amplitude and phase, are necessary to increase the spectral efficiency of communication systems. READ MORE

  5. 3. Colors of Life and Optoelectronics: Zinc Porphyrins for Light-Emitting Electrochemical Cells and Organic Photodetectors

    Author : Mariza Mone; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; near-infrared; porphyrins; light emitting electrochemical cell; photomultiplication; optoelectronics; aggregation;

    Abstract : The field of organic optoelectronics constitutes an interdisciplinary field that covers chemistry, physics, materials science and biology. The technological promises of the organic materials over their inorganic counterparts include a lower production cost and the feasibility to be processed through solution-based techniques on large-area and/or flexible substrates. READ MORE

  6. 4. NbTiN for improved superconducting detectors

    Author : Julien Zichi; Val Zwiller; Gregory Gol'tsman; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; superconducting nanowire sngle photon detector; SNSPD; niobium titanium nitride; NbTiN; reactive co-sputtering; quantum communications; quantum sensing; Fysik; Physics;

    Abstract : The physics of single photons is fascinating, by manipulating them we can observe and probe quantum effects. Doing so requires the fabrication and utilization of single photon sources, of which many types have been developed including quantum dots, trapped atoms and ions, and color centers. READ MORE