Sökning: "photon transmission."

Visar resultat 21 - 25 av 40 avhandlingar innehållade orden photon transmission..

  1. 21. Quantum optics and relativistic motion with superconducting circuits

    Författare :Joel Lindkvist; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Superconducting microwave circuits provide a versatile platform for studying quantum optics with artificial atoms, mainly motivated by applications in quantum information. In addition, the circuits are promising for simulation of relativistic phenomena. This thesis is based on theoretical work along both these lines. LÄS MER

  3. 22. High Speed Vertical Cavity Surface Emitting Lasers for Short Reach Communication

    Författare :Petter Westbergh; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high speed modulation; GaAs; Semiconductor laser; InGaAs; vertical cavity surface emitting laser VCSEL ; laser dynamics; fabrication;

    Sammanfattning : The vertical cavity surface emitting laser (VCSEL) is a low cost light source with attractive performance characteristics such as low power consumption, high speed capabilities at low currents, and a circular output beam. These features have made the VCSEL an established component in digital communication networks, particularly in short reach optical data transmission applications where links consisting of GaAs-based 850nm VCSELs and multimode fiber have become the standard solution. LÄS MER

  4. 23. Dosimetric effects of removing the flattening filter in radiotherapy treatment units

    Författare :Mårten Dalaryd; Lund Medicinsk strålningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The aim of this work was to investigate the dosimetric effects of removing the flattening filter from conventional C-arm medical linear accelerators. In conventional linear accelerators used for radiotherapy, a flattening filter is positioned in the beam line to provide a uniform lateral dose profile at a specified depth in water. LÄS MER

  5. 24. Ultralow noise pre-amplified receiver for free-space optical communications

    Författare :Ravikiran Kakarla; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensitivity; noise figure; optical injection locking; Phase sensitive amplifier;

    Sammanfattning : The demand for high data rate in space communication links is increasing due to the growth of space exploration missions inter-satellite, and satellite-to-Earth data transmission. Optical communication systems capable of handling hundreds of Gigabits per second data transmission with a single light carrier and are suitable for such space links. LÄS MER

  7. 25. Strong Interaction Between a Single Artificial Atom and Propagating Microwave Photons

    Författare :Io Chun Hoi; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave devices; Mollow triplet.; qubit; circuit QED; electromagnetically induced transparency; quantum nodes; transmon; quantum channels; superconductivity; anomalous dispersion; quantum information; microwaves; quantum network;

    Sammanfattning : The realization of a quantum network composed of quantum nodes which process quantum fields and quantum channels to transfer quantum information has recently been proposed. In recent years, fundamental experiments produced by superconducting circuits suggest that they are promising candidates for realization of a quantum network. LÄS MER