Search for dissertations about: "mid-infrared generation"

Showing result 6 - 10 of 17 swedish dissertations containing the words mid-infrared generation.

  2. 6. Toward Creating a Coherent, Next-Generation Light Source with special emphasis on nonlinear harmonic generation in single-pass, high-gain free-electron lasers

    Author : Sandra G. Biedron; Lunds universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Visible and Ultraviolet Sources; Intense Particle Beams and Radiation Sources; Frequency Conversion; Free-Electron Lasers; Harmonic Generation; Physics; Fysik;

    Abstract : There is a strong desire for short wavelength (~1 Å), short pulsewidth (.... READ MORE

  4. 7. The cosmic origin of fluorine and sulphur: Infrared spectroscopic studies of red giants

    Author : Henrik Jönsson; Astronomi - Genomgår omorganisation; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemical evolution; near-infrared and mid-infrared spectroscopy; stellar abundances;

    Abstract : Disregarding the small primordial traces of the lightest elements, all metals have been formed in stellar processes, which means that the relative amount of metals in the Universe increases for every stellar generation. This build-up of elements is called chemical evolution and might be used both to constrain stellar models as well as understanding the formation and evolution of stellar populations. READ MORE

  5. 8. Optical Parametric Devices in Periodically Poled LiTaO3

    Author : Martin Levenius; Katia Gallo; Valdas Pasiskevicius; Giuseppe Leo; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nonlinear optics; parametric processes; frequency downconver-sion; quasi-phase matching; LiTaO3; broadband downconversion; quadratic cascading; nonlinear photonic crystals; twin-beam generation;

    Abstract : Optical parametric frequency conversion based on quasi phase matching (QPM) in nonlinear optical crystals is a powerful technique for generating coherent radiation in wavelength ranges spanning from the mid-infrared (mid-IR) to the blue, displaying low thermal load and high efficiency.This thesis shows how QPM in one- (1D) or two-dimensional (2D) lattices can be employed to engineer novel devices for parametric downconversion in the IR, af-fording freedom in designing both spectral and angular properties of the parametric output. READ MORE

  6. 9. Diode laser spectroscopy in extended wavelength ranges

    Author : Ulf Gustafsson; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diode-laser spectroscopy; frequency-modulation spectroscopy; frequency conversion; fluorescence spectroscopy; scattering; diffraction; Fysicumarkivet A:2000:Gustafsson; Atomic and molecular physics; Atom- och molekylärfysik; absorption spectroscopy;

    Abstract : Diode laser spectroscopy performed in the ultraviolet, visible and infrared spectral regions is presented. The accessible wavelength range for visible and near-infrared diode lasers is extended by the use of sum- and difference-frequency generation. READ MORE

  7. 10. Highly efficient optical parametric oscillators in the mid-IR

    Author : Nicky Thilmann; Valdas Pasiskevicius; Fredrik Laurell; Klaus Boller; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : This thesis shows how sources of coherent radiation in the mid-infrared (mid-IR) region can be enhanced. To achieve this, optical parametric oscillators (OPOs) employing improved novel materials, new optical elements, and novel cavity designs have been implemented. READ MORE