Sökning: "parametric interaction"

Visar resultat 1 - 5 av 82 avhandlingar innehållade orden parametric interaction.

  1. 1. Spectral Management in Quasi-Phase-Matched Parametric Devices

    Författare :Mikael Tiihonen; Fredrik Laurell; Jean-Jaques Zondy; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optical parametric devices; nonlinear optics; ultraviolet generation; mid-infrared generation; optical parametric oscillator; optical parametric generator; optical parametric amplifier; Optical physics; Optisk fysik;

    Sammanfattning : Nonlinear optical interaction in quasi-phase-matched structures opens up unique possibilities to build compact and efficient parametric devices such as optical parametric oscillators, generators, and amplifiers with tailored spectral properties. The focus of this thesis is on novel parametric interactions with periodically-poled KTiOPO4 (PPKTP) as the parametric gain medium. LÄS MER

  3. 2. Using direct manipulation for real-time structural design exploration

    Författare :Daniel Åkesson; Byggnadsmekanik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Interactive structural analysis; Very direct manipulation; Interactive structural form finding;

    Sammanfattning : Before a new structure can be built, it must be designed. This design phase is a very important step in the building process. The total cost of the structure and its structural performance are largely dependent on the structural design process. The impact of decisions on the design process is initially high and declines as the design matures. LÄS MER

  4. 3. Parametric interactions with signals and the vacuum

    Författare :Michael Roger Andre Simoen; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vacuum; circuit-QED; interferometer; SQUID; dynamical Casimir effect; multimode resonator; pumpistor; mode conversion; superconducting circuits; parametric amplification;

    Sammanfattning : In this thesis I present different experiments on superconducting circuits exploring parametric interactions with external signals and the vacuum in the microwave regime. These parametric processes are the result of the periodic modulation of a property of a system which results in different interactions. LÄS MER

  5. 4. Nanosecond optical parametric oscillators and amplifiers based on periodically poled KTiOPO4

    Författare :Jonas Hellström; KTH; []
    Nyckelord :optical parametric oscillators; optica parametric amplifiers; quasi-phasematching; KTiOPO4; nonlinear optics; frequency conversion; periodic electric field poling; ferroelectrics; high-order second harmonic generation; electro-optic effect;

    Sammanfattning : Optical parametric oscillators (OPOs) and optical parametricamplifiers (OPAs) constitute a class of optical frequencyconverting devices that have many possible applications, e.g.in range finding, molecular spectroscopy and medicine. LÄS MER

  7. 5. Children in the Radiology Department : a study of anxiety, pain, distress and verbal interaction

    Författare :Berit Björkman; Karin Enskär; Kerstin Öhrling; Jönköping University; []
    Nyckelord :Children; radiography; experiences; anxiety; pain; distress; verbal interaction; examination;

    Sammanfattning : This dissertation focuses on children’s experiences of going through an acute radiographic examination due to a suspected fracture. The findings from interviews with children aged 3-15 years showed anxiety, pain and distress to be a concern in conjunction with an examination (Paper I). LÄS MER