Sökning: "Second Harmonic Generation"

Visar resultat 1 - 5 av 22 uppsatser innehållade orden Second Harmonic Generation.

  1. 1. Quantum Optical Description of High-order Harmonic Generation

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Isabel Moreno; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : High-order Harmonic Generation (HHG) is a highly non-linear process in which an atom interacts with a strong laser field. The laser field lowers the atomic potential barrier allowing bound electrons to escape into the continuum through tunnel ionization, propagate, and, with some probability, recombine with the parent ion. LÄS MER

  3. 2. Digitally Controlled Oscillator Topologies for mm-Wave Pulsed Coherent Radar

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Klas Junskog; [2023]
    Nyckelord :oscillators; mm-wave; radar; Technology and Engineering;

    Sammanfattning : The advancement of future generations of wireless communication and radar sensing warrants the need for mm-wave digitally controlled oscillators (DCOs) with high-frequency trade-offs in consideration. The purpose of this project is to investigate DCO topologies inspired from scientific literature. LÄS MER

  4. 3. Frekvensdubbling i kvasifasmatchad Rb-dopad KTiOPO4 med temperaturgradient för 1030nm laser

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Tim Sandgren; Karl Svahn; [2023]
    Nyckelord :KTP; Quasi-phased matched; Rb-doped; pulsed wave; CW;

    Sammanfattning : Denna avhandling går ut på att undersöka verkningsgradens temperaturberoende för SHG (second harmonic generation) från 1030nm till 515nm, i en kvasifasmatchad KTP-kristall, för både pulsad och CW (continuous wave)-laser. Detta undersöktes då det har tidigare noteras att verkningsgraden hos en KTP-kristall avtar när effekten på lasern ökar. LÄS MER

  5. 4. III-V semiconductor waveguides for application in nonlinear optics.

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Andreas Charalampous; [2022]
    Nyckelord :InGaP; optical waveguides; integrated optics; quantum nonlinear optics; SHG; SPDC; InGaP; optiska vågledare; integrerad optik; icke-linjär kvantoptik; SHG; SPDC;

    Sammanfattning : This thesis presents studies on III-V semiconductor waveguides with particular emphasis on second-order optical nonlinearity. The nonlinear processes that were investigated in this thesis are the Second Harmonic Generation (SHG) and the Spontaneous Parametric Down-Conversion (SPDC). LÄS MER

  7. 5. Semi-Classical Calculations of Multiple Trajectories in High-Harmonic Generation

    Kandidat-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Tom Causer; [2021]
    Nyckelord :hhg; high harmonic generation; trajectories; xuv; semi-classical; multiple; third trajectory; further; matlab; hhg approximation; simulation; far-field; near-field; fourier transform; Physics and Astronomy;

    Sammanfattning : The purpose of this thesis is to investigate the High-Harmonic Generation (HHG) process by simulating electron trajectories, and their resulting Extreme Ultra Violet (XUV) output. The HHG process is one in which a focused beam of infrared (IR) light can rival (in terms of intensity) the potentials of atoms, which makes tunnelling likely -- this sets off a chain of events resulting in an XUV pulse. LÄS MER