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This thesis discusses the power scaling of ultrashort pulses in enhancement cavities, utilized in particular for frequency conversion processes, such as Thomson scattering and high-harmonic generation. Using custom optics for ultrashort-pulse enhancement cavities, it demonstrates for the first time that at the envisaged power levels, the mitigation of thermal effects becomes indispensable even in cavities comprising solely reflective optics. It also studies cavities with large beams, albeit with low misalignment sensitivity, as a way to circumvent intensity-induced mirror damage. Average powers of several hundred kilowatts are demonstrated, which benefit hard x-ray sources based on Thomson scattering. Furthermore, pulses as short as 30 fs were obtained at more than 10 kW of average power and employed for high-harmonic generation with photon energies exceeding 100 eV at 250 MHz repetition rate, paving the way for frequency comb spectroscopy in this spectral region.
Physics. --- Quantum optics. --- Optics, Lasers, Photonics, Optical Devices. --- Classical Electrodynamics. --- Quantum Optics. --- Laser pulses, Ultrashort. --- Laser pulses, Picosecond --- Light pulses, Picosecond --- Light pulses, Ultrashort --- Picosecond laser pulses --- Picosecond light pulses --- Ultrashort laser pulses --- Ultrashort light pulses --- Laser beams --- Pulse techniques (Electronics) --- Picosecond pulses --- Lasers. --- Photonics. --- Optics. --- Electrodynamics. --- Optics --- Photons --- Quantum theory --- Dynamics --- Physics --- Light --- New optics --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Light sources --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators
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This book reports on the development of a pioneering light source architecture of the so-called Petawatt Field Synthesizer (PFS) system, which is based on short-pulse pumped, optical parametric chirped pulse amplification (OPCPA), driven by a homemade, 1-ps diode-pumped Yb:YAG. At a few-cycle pulse duration of the amplified pulses, this architecture yields record levels of peak power and temporal contrast, the latter boasting a 100-times faster rise time from the noise level to peak intensity of the pulse compared to conventional laser systems. This allows investigation of the true laser–solid interaction without premature plasma expansion and without lossy pulse cleaning by e.g. plasma mirrors. The book describes several concepts for the generation of broadband, high-energy and high-contrast seed pulses, as well as the OPCPA development, few-cycle pulse compression and contrast characterization in a concise and insightful manner. The theory chapter serves as an excellent and accessible primer on OPCPA and other nonlinear interactions, while the experimental parts provide an excellent description of the challenges of developing such a novel architecture and some of the innovative solutions to overcome them.
Physics. --- Quantum optics. --- Microwaves. --- Optical engineering. --- Optics, Lasers, Photonics, Optical Devices. --- Quantum Optics. --- Microwaves, RF and Optical Engineering. --- Laser pulses, Ultrashort. --- Mechanical engineering --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Optics --- Photons --- Quantum theory --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Dynamics --- Laser pulses, Picosecond --- Light pulses, Picosecond --- Light pulses, Ultrashort --- Picosecond laser pulses --- Picosecond light pulses --- Ultrashort laser pulses --- Ultrashort light pulses --- Laser beams --- Pulse techniques (Electronics) --- Picosecond pulses --- Lasers. --- Photonics. --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Light sources --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators --- New optics
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