Sökning: "Spectral broadening"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Spectral broadening.

  1. 1. Spectral broadening of 4 mJ femtosecond pulses using a bulk multi-pass cell

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

    Författare :Saga Westerberg; [2023]
    Nyckelord :Lasers; Ultrashort; Nonlinear Optics; femtosecond; Multi-Pass Cell; Spectral broadening; pulse post-compression; Self phase modulation; Physics and Astronomy;

    Sammanfattning : Nonlinear optical effects can be used for spectral broadening, which the basis of the field of post-compression of laser pulses. When the intensity of light becomes high enough the refractive index becomes intensity dependent, and as the intensity often varies both with position and time so does the refractive index. LÄS MER

  3. 2. Modulation of the optical properties of quantum dots by surface acoustic waves

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Tanguy Schetelat; [2023]
    Nyckelord :Nanophotonics; Quantum dots; Surface acoustic waves; Interdigital tansducers; Optomechanical coupling; Nanofotonik; Kvantprickar; Akustika yt-vågor; Interdigital tansducers; Optomekanisk koppling;

    Sammanfattning : Semiconductor quantum dots (QDs) are considered to be a crucial part of future quantum technologies due to their enormous potential as efficient sources of single and indistinguishable photons. Single photons are necessary to transport quantum information over large distances through the existing global fibre optic network. LÄS MER

  4. 3. Prompt emission in Gamma-ray bursts; Photospheric Radiation from Synchrotron-Like spectra

    Kandidat-uppsats, KTH/Fysik

    Författare :Erik Vitols; [2022]
    Nyckelord :Gamma-ray burst; radiation mechanisms: thermal and non-thermal;

    Sammanfattning : Gamma-ray bursts (GRBs) are the most luminous phenomena in the Universe, explosions whoseenergy is generated by supernovae or mergers of dense objects such as neutron stars. The GRBemission is divided into the prompt emission phase characterized by γ-ray radiation and the afterglowof lower energy radiation. LÄS MER

  5. 4. Collisional broadening by hydrogenfor stellar spectroscopy : extension towards high-lying states

    Kandidat-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Adam Hultquist; [2019]
    Nyckelord :Astrophysics; Spectral line broadening; ABO; Collisional broadening;

    Sammanfattning : The object of this thesis is to extend the current tables for two useful quantities when calculatingcollisional broadening, the cross-section of interaction and the velocity parameter.These quantities, which have hitherto been tabulated for lower states, have now been calculatedfor higher lying states and are used in the ABO - model for spectral line broadening. LÄS MER

  7. 5. Spectral line broadening using ABO theory

    L3-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Adam Hultquist; [2019]
    Nyckelord :;

    Sammanfattning : .... LÄS MER