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With the development of modem THz technology [1], which can provide electric fields with GV/m gradients, THz-based control and manipulation of the electron bunches has become possible. THz-driven electron acceleration, compression and streaking have attracted much attention recently [2, 3]. Here, we present a novel THz driven electron streak camera that provides sub-fs temporal resolution using a...
We demonstrate temporal characterization of the front-end for an Yb-based, passively CEP-stable, two-octave-wide, two-channel optical parametric synthesizer driven by slightly sub-picosecond pump pulses from a multi-mJ regenerative amplifier at 1 kHz.
Strong-field, single-cycle THz fields accelerate electrons with peak energies of up to 0.75 keV in a millimeter-sized THz gun with bunch charge of 45 fC. Energy spreads as low as 5.8% were also achieved.
Over the past decades, advances in ultrafast technologies led to the generation of intense ultrashort THz to optical pulses with single-cycle pulse duration. Using such ultrashort pulses for electron acceleration offers advantages in terms of higher thresholds for material breakdown which opens up a promising path towards increased acceleration gradients. In this contribution, we present the first...
We demonstrate the generation of single-cycle 0.1-THz radiation in a lithium niobate crystal using optical rectification and obtain THz output energy of 65 μJ with 31.6 MV/m peak field. This amounts to an optical-to-THz energy conversion efficiency of 0.3% at 85 K, which is in agreement with theory.
We report on a record 2% extracted optical-to-terahertz conversion efficiency in the mm-wavelength range through optical rectification in cryogenically-cooled lithium niobate by exploiting spatial and temporal shaping of the optical pump beam.
The dynamics and stability of Ho:YLF regenerative amplifiers is studied experimentally and numerically, whereas operating conditions are analyzed with respect to energy fluctuations. We propose a low-noise laser design operating at a second stability point.
We demonstrate a front-end of an Yb-based passively CEP-stable, two-octave wide, two-channel optical parametric synthesizer driven by slightly sub-picosecond pump pulses from a multi-mJ regenerative amplifier at 1 kHz.
The phase and stability characterization of white-light supercontinuum generated by sub-picosecond pulses at 1 μm in YAG and sapphire for different pump focusing and duration shows compressible pulses, suitable for applications like waveform synthesis.
High energy picosecond lasers are important as drivers for optical parametric chirped pulse amplifiers (OPCPA), THz generation, micromachining and more. Here, we are using two cryogenically cooled Yb:YAG gain elements in a strictly image relayed multipass architecture to reach our goal of building a 100 W average power laser system delivering 1-joule pulses of 10 picosecond duration to drive high-flux...
High energy lasers are important for many applications ranging from micro-machining to surgery to nonlinear optics. In regenerative amplifiers reaching mJ energies, the intracavity non-linearities become important. To minimize those, high stretching factor and increased spot sizes are needed in the crystal, the latter reducing gain at fixed pump power. To keep up the gain and increase the extractable...
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