Sökning: "Gas Amplification"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Gas Amplification.

  1. 1. Simulation of Quantum Cascade Lasers

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Författare :Zakaria Mohamed; [2023]
    Nyckelord :Quantum Cascade Lasers; Simulations; Numerical Methods; Computational Models; Heterostructures; Physics and Astronomy;

    Sammanfattning : This thesis aimed to contribute to the improvement of Quantum Cascade Lasers (QCLs) by focusing on the effective determination of quantum levels in these devices. The current method relies on an outdated Fortran code, which poses challenges when integrating into optimization schemes. LÄS MER

  3. 2. Gas in Scattering Media Absorption Spectroscopy in Large Geometries: Towards Monitoring Oxygen in Adult Lungs

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

    Författare :Anna Brandt; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : GAs in Scattering Media Absorption Spectroscopy (GASMAS) is a technique to study free gas inside strongly scattering bulk-materials. GASMAS is successful in safely measuring oxygen in lungs of neonates, with low-power tuneable diode-laser spectroscopy at 760 nm. LÄS MER

  4. 3. None are so deaf as those who would not hear : identifying where, who, and how the coal industry influences Australian federal energy policies

    Master-uppsats, Lunds universitet/LUCSUS

    Författare :Martin Fox; [2020]
    Nyckelord :Sustainability Science; Sustainable Transitions; Fossil-fuel Hegemony; Decarbonisation; Australian Federal Government; Environmental Governance; Ecological Resilience; Social Sciences;

    Sammanfattning : The widespread consequences of climate change are becoming more and more evident around the world and are raising crucial awareness to world leaders that a sustainable transition is direly needed to mitigate against disastrous climatic events. In Australia, in early 2020, these events took the form of some of the most devastating and largest forest fires the country has ever seen. LÄS MER

  5. 4. Dispersion management and characterization of ultrashort laser pulses for the optimization of parametric processes

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

    Författare :Axel Elfving; [2019]
    Nyckelord :frequency resolved optical gating; optical parametric amplification; difference frequency generation; nonlinear optics; laser pulse compression; lasers; optics; Technology and Engineering; Physics and Astronomy;

    Sammanfattning : This thesis set out to continue the development of a short-wave infrared (SWIR) optical parametric amplifier (OPA). The system is based on a Yb-ber chirped pulse amplification (CPA) laser delivering 400 fs long pulses, centered around 1030 nm, at 200 kHz repetition rate and 40 W average power. LÄS MER

  7. 5. Temporal Characterization and Intensity Contrast Improvement of Few-cycle Laser Pulses

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Xiaoying Zhang; [2019]
    Nyckelord :;

    Sammanfattning : Due to the unique combination of properties of high intensity and few optical cycle pulse duration, the ultrashort laser pulses have widespread applications in pump-probe spectroscopy and laser-plasma interaction. Correspondingly, it is critical to precisely measure the electric field in the temporal or spectral domain. LÄS MER