A5034585686- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Laser-Plasma Interactions and Diagnostics
- Advanced Fiber Laser Technologies
- Laser Design and Applications
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Laser-induced spectroscopy and plasma
- Cold Atom Physics and Bose-Einstein Condensates
- Glass properties and applications
- Advanced Frequency and Time Standards
- Photonic Crystal and Fiber Optics
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Photorefractive and Nonlinear Optics
- Nuclear Physics and Applications
- Laser Material Processing Techniques
- Pulsed Power Technology Applications
- Thin-Film Transistor Technologies
- Astronomical and nuclear sciences
- Advanced X-ray Imaging Techniques
- CCD and CMOS Imaging Sensors
- Radiation Detection and Scintillator Technologies
Helmholtz-Zentrum Dresden-Rossendorf
2015-2024
Technische Universität Dresden
2013-2019
GSI Helmholtz Centre for Heavy Ion Research
2017
We report on the first demonstration of a diode-pumped, gas cooled, cryogenic multislab Yb:YAG amplifier. The performance was characterized over temperature range from 88 to 175 K. A maximum small-signal single-pass longitudinal gain 11.0 measured at When amplifying nanosecond pulses, recorded output energies were 10.1 J 1 Hz in four-pass extraction geometry and 6.4 10 three-pass setup, corresponding optical conversion efficiencies 21% 16%, respectively. To our knowledge, this represents...
We report on first commissioning results of the DRACO Petawatt ultra-short pulse laser system implemented at ELBE center for high power radiation sources Helmholtz-Zentrum Dresden-Rossendorf. Key parameters essential efficient and reproducible performance plasma accelerators are presented discussed with demonstration 40 MeV proton acceleration under TNSA conditions as well peaked electron spectra unprecedented bunch charge in 0.5 nC range.
We report on recent experimental results deploying a continuous cryogenic hydrogen jet as debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient acceleration reaching cut-off energies up to 20 MeV with particle numbers exceeding 10
Abstract We report on experimental investigations of proton acceleration from solid foils irradiated with PW-class laser-pulses, where highest cut-off energies were achieved for temporal pulse parameters that varied significantly those an ideally Fourier transform limited (FTL) pulse. Controlled spectral phase modulation the driver laser by means acousto-optic programmable dispersive filter enabled us to manipulate shape last picoseconds around main and study effect thin foil targets. The...
Laser plasma-based particle accelerators attract great interest in fields where conventional reach limits based on size, cost or beam parameters. Despite the fact that cell simulations have predicted several advantageous ion acceleration schemes, laser not yet reached their full potential producing simultaneous high-radiation doses at high energies. The most stringent limitation is lack of a suitable high-repetition rate target also provides degree control plasma conditions required to...
We introduce the directly diode-pumped PEnELOPE laser-system which is designed for a pulse energy of 150 J, repetition rate 1Hz and duration 120 fs. The principle setup amplifier stretcher-compressor system as well pumping, extraction cooling scheme power amplifiers will be reported. In this paper we focus on numerical modeling design studies.
Laser cooling is a powerful technique to reduce the longitudinal momentum spread of stored relativistic ion beams. Based on successful experiments at experimental storage ring GSI in Darmstadt, which we show some important results this paper, present our plans for laser beams future heavy-ion synchrotron SIS100 Facility Antiproton and Ion Research Darmstadt.
Abstract In this paper the development and implementation of a novel amplifier setup as an additional stage for CPA pump laser Petawatt Field Synthesizer, currently developed at Max‐Planck‐Institute Quantum Optics, is presented. This design comprises 20 relay‐imaged passes through active medium which are arranged in rotational symmetry. As gain material, in‐house‐developed Yb:YAG active‐mirror used. With setup, stretched 4 ns seed pulses amplified to output energies exceeding 1 J with...
We present picosecond Yb:YAG and Yb:CaF2 regenerative laser amplifiers with ultra-high repetition rates in the MHz range. A maximum pulse energy of 40 μJ was obtained at 20 kHz while we achieved around 1 MHz. demonstrated a duration 2.1 ps for 4.8 when seeded by mode-locked Yb:KGW fs-oscillator without stretching or phase compensation.
Abstract We report on the development of an ultrafast optical parametric amplifier front-end for Petawatt High Energy Laser heavy Ion eXperiments (PHELIX) and ENergy-Efficient Optical Plasma Experiments (PEnELOPE) facilities. This delivers broadband stable amplification up to 1 mJ per pulse while maintaining a high beam quality. Its implementation at PHELIX allowed one bypass amplifier, which is known be source pre-pulses. With bypass, amplified spontaneous emission contrast $4.9\times...
Yb(3+)-doped gain media offer favorable properties for diode-pumped laser amplifiers high-energy ns-pulses. To reach high optical-to-optical conversion efficiencies at room temperature however, very and often impractical fluences are required both pumping extraction. Low operation offers a solution, but the cryogenic cooling systems add considerable complexity, bulkiness cost. Multi-passing pump extraction beams through medium is an alternative approach to overcome efficiency limitations...
We report the first short-pulse amplification results to several hundred millijoule energies in ceramic Yb:LuAG. have demonstrated ns-pulse output from a diode-pumped Yb:LuAG amplifier at maximum energy of 580 mJ and peak optical-to-optical efficiency 28% 550 mJ. In cavity dumped operation nanosecond oscillator we obtained 1 up 100 Hz repetition rate. A gain bandwidth 5.4 nm was achieved room temperature by measuring small-signal single-pass gain. Furthermore, compared our with Yb:YAG within...
We show how optical free-electron lasers and enhanced incoherent Thomson scattering radiation sources can be realized with Traveling-Wave Thomson-Scattering (TWTS) today. Emphasis is put on the realization of (OFELs) existing state-of-the-art technology for laser systems electron accelerators. The conceptual design setups preparation pulses suitable TWTS OFELs presented. further provide expressions to estimate acceptable alignment tolerances components OFEL operation. Examples radiating at...
We investigated the lasing performance of a multislab Yb:QX and Yb:YAG laser amplifiers using facet-cooled design. Di-deuterium oxide (D2O) was used as coolant flowing between active slabs with pump light passing through very low absorbing heavy-water films. A square profile at maximum intensity 40 kW/cm2 drove amplifier peak fluence 5.5 J/cm2 pulse duration 6 ns. demonstrated energy 1 J for each gain medium well repetition rate 10 Hz glass, thus showing feasibility scalability directly...
We report on a compact diode-pumped, chirped pulse regenerative amplifier system with duration of 162 fs and an output energy 1 mJ before as well 910 µ J after compression optimized for the probing ultrafast relativistic laser-plasma processes. A volume Bragg grating (CVBG) acts combined stretcher/compressor representing robust solution CPA laser in millijoule range. Yb 3+ :CaF 2 is used gain medium to support large bandwidth 16 nm (FWHM) when spectral shaping applied. Chirped mirrors...
We report on the energetic and beam quality performance of second to last main amplifier section HEPA I PE n ELOPE laser project. A polarization coupled double-12-pass scheme verify full amplification capacity two amplifiers II was used. The small signal gain for a narrow-band continuous wave 900 527 broadband nanosecond pulse, demonstrating 12.6 J output pulse energy. Those pulses, being spectrally wide enough support equivalent 150 fs long ultrashort are shown with an excellent spatial...
Abstract Due to the non-linear nature of relativistic laser induced plasma processes, development laser-plasma accelerators requires precise numerical modeling. Especially high intensity laser-solid interactions are sensitive temporal rising edge and predictive capability simulations suffers from incomplete information on state at onset interaction. Experimental diagnostics utilizing ultra-fast optical backlighters can help ease this challenge by providing temporally resolved inside into...
For laser performance simulations, optical properties of applied active materials have to be exactly known. Here we report on temperature dependent emission and absorption cross section measurements for Yb:YAG, Yb:CaF<sub>2</sub> Yb:FP15-glass. The the samples was aligned in steps 20 K between 100 room with a liquid nitrogen driven cryostat. Absorption spectra were obtained fiber coupled white light source fluorescence by excitation 10W diode at 970 nm. All spectral performed scanning...
We present a novel approach for the amplification of high peak power femtosecond laser pulses at repetition rate. This is based on an all-diode pumped burst mode scheme. In this scheme, pulse bursts with total duration between 1 and 2 ms are be generated amplified. They contain 50 to 2000 individual equally spaced in time. The have initial 350 fs stretched ps prior amplification. amplifier stage Yb3+:CaF2 cooled 100 K. amplifier, output energy excess 600 mJ per rate 10 Hz demonstrated. For...
Fabrication, spectroscopic properties, and laser performance of a Yb:SiO(2) multicomponent glass have been investigated in this paper. The system composed SiO(2), Al(2)O(3), La(2)O(3) excels terms high thermal stress resistance compared to other glasses. experiments were conducted with 3.4 mm thick 0.9 mol. % Y(2)O(3) doped sample. A maximum slope efficiency 51%, optical 42%, tuning range from 1010-1090 nm was realized. Due the promising properties straightforward fabrication technique it...
Probing the rapid dynamics of plasma evolution in laser-driven interactions provides deeper understanding experiments context ion acceleration and facilitates interplay with complementing numerical investigations. Besides microscopic scales involved, strong (self-)emission, predominantly around harmonics driver laser, often complicates data analysis. We present concept implementation a stand-alone probe laser system that is temporally synchronized to providing probing wavelengths beyond...
Abstract A diode‐pumped Yb:YAG MOPA‐System for the unprecedented generation of transform limited pulses with variable pulse duration in range between 10 ps and 100 is presented. First applications relying on unique parameters as modulation free spectrum, tunability coherence length, namely direct laser interference patterning (DLIP) cooling stored relativistic ion beams are highlighted. Pulses generated by a mode‐locked fs‐oscillator while spectral bandwidth narrowed subsequent regenerative...
In this work, we present a comprehensive method to measure the gas parameters, such as effective Townsend coefficient and electron drift velocity in homogeneous high electric fields (up 100 kV/cm) at atmospheric pressure room temperature. A pulsed laser facility with micro-meter spatial accuracy picosecond pulse duration is used ignite primary ionizations specific positions gap of Resistive Plate Chamber (RPC) detector prototype. The parameters are determined solely by RPC signals. main...