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Visar resultat 1 - 5 av 29 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Dopant inclusion and isomorphism of KTP : a nonlinear optical material

    Författare :Stefan Norberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; potassium titanium phosphate; dopant positions; single crystal X-ray diffraction; KSbOGeO4-KSbOSiO4; KTP; KTiOP4; TiP2O7 superstructure;

    Sammanfattning : .... LÄS MER

  3. 2. Fabrication and characterization of periodically poled KTB and RB-doped KTB for applications in the visible and UV

    Författare :Shunhua Wang; Fredrik Laurell; Peter Smith; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nonlinear optics; second-harmonic generation; quasi-phasematching; type-I QPM SHG; type-II QPM SHG; KTP; RKTP; periodic electric-field poling; Physics; Fysik;

    Sammanfattning : This thesis deals with the fabrication and the characterization of periodically-poled crystals for use in lasers to generate visible and UV radiation by second-harmonic generation (SHG) through quasi-phasematching (QPM). Such lasers are of practical importance in many applications like high-density optical storage, biomedical instrumentation, colour printing, and for laser displays. LÄS MER

  4. 3. QPM Devices in KTA and RKTP

    Författare :Andrius Zukauskas; Carlota Canalias; Moti Katz; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; QPM; periodic poling; KTP;

    Sammanfattning : Even though KTiOPO4 (KTP) is considered to be one of the best nonlinear materials for quasi phase matched (QPM) frequency conversion in the visible and the near-infrared spectral regions, its use is often limited by poor material homogeneity, high ionic conductivity, a considerable linear absorption and photochromatic damage. On the other hand, the improved material homogeneity and the lower ionic conductivity of bulk Rb-doped KTP (RKTP) make this material an ideal alternative for fabrication of fine-pitch QPM gratings, while the arsenate isomorph KTiOAsO4 (KTA) promises a better performance in the green spectral region and adds the advantage of a wider transparency window in the infrared. LÄS MER

  5. 4. Spectral control of lasers and optical parametric oscillators with volume Bragg gratings

    Författare :Björn Jacobsson; Fredrik Laurell; Uwe Morgner; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; volume Bragg gratings; single-longitudinal-mode laser; laser tuning; erbium; neodymium; ytterbium; nonlinear optics; optical parametric oscillator; KTP; tunable optical parametric oscillator; narrowband optical parametric oscillator; Physics; Fysik;

    Sammanfattning : I den här avhandlingen visas hur lasrar och optiska parametriska oscillatorer (OPO:er) kan styras spektralt med hjälp av volymbraggitter. Volymbraggitter utgörs av ett periodiskt varierande brytningsindex som skrivits i ett fototermorefraktivt glas. LÄS MER

  7. 5. Diode-pumped Er-Yb lasers for eye-safe applications

    Författare :Gunnar Karlsson; KTH; []
    Nyckelord :mid-infrared lasers; microchip lasers; q-switching. Erbium; ytterbium; laser materials; phospate glasses; spinel; opticao parametric amplification; ktp;

    Sammanfattning : .... LÄS MER