Search for dissertations about: "yb doped"

Showing result 1 - 5 of 15 swedish dissertations containing the words yb doped.

  2. 1. Power Scaling of Highly Compact Single-Frequency Yb-Doped Fiber Amplifiers

    Author : Enkeleda Balliu; Hans-Erik Nilsson; Magnus Engholm; Pavel Peterka; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; single-frequency; fiber amplifier; Yb-doped fibers; stimulated Brillouin scattering; compact lasers; thermal load; SHG; MOPA;

    Abstract : Both scientific interests and industrial applications have stimulated the advance of single-frequency laser technology. The high spatial and temporal coherence of this technology has facilitated many applications such as gravitational wave detection, high-precision fiber sensors, high-resolution spectroscopy, holography, and nonlinear optical conversion. READ MORE

  4. 2. Novel materials for Yb and Er-Yb doped microchip lasers

    Author : Jonas Hellström; Fredrik Laurell; Lars Sjöqvist; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mid-IR lasers; laser materials; Optical physics; Optisk fysik;

    Abstract : The objective of this thesis has been to investigate novel host material configurations for high-power end-pumped Er-Yb co-doped, or Yb doped microchip lasers and try to increase their performance. In Er-Yb co-doped systems, the main limitation is the thermal shortcomings of the phosphate glass host material. READ MORE

  5. 3. Radiation induced losses in Ytterbium doped laser materials

    Author : Sara Rydberg; Magnus Engholm; Hans-Erik Nilsson; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : In this work, two types of ytterbium (Yb) doped laser materials are studied, crys-talline Yb:YAG and amorphous Yb/Al silica in both preform and fiber. Yb is suitableas a laser ion because of its simple energy level structure and low quantum defect. READ MORE

  6. 4. Diode-pumped rare-earth-doped quasi-three-level lasers

    Author : Stefan Bjurshagen; Fredrik Laurell; Markus Pollnau; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optics; laser optics; Physics; Fysik;

    Abstract : Many rare-earth-doped materials are suitable for laser operation and this thesis focuses on diode-pumped solid-state lasers employing crystals doped with the trivalent rare-earth ions neodymium (Nd3+), ytterbium (Yb3+) and erbium (Er3+). Especially, the quasi-three-level transitions in Nd and Yb have been studied as well as the eye-safe three-level transition around 1. READ MORE

  7. 5. Acceptor-Doped BaZrO3 Perovskite: Synthesis, Structure and Proton Conductivity

    Author : Istaq Ahmed; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Impedance spectroscopy; Perovskite; Neutron diffraction; Rietveld refinement; BaZrO3.; Proton conductor;

    Abstract : Acceptor-doped perovskite oxides exhibit significant proton conductivity in hydrogen containing atmospheres. Therefore, they have potential for use as separator materials for various electrochemical devices including gas sensors, electrolysers and fuel cells. READ MORE