A5003236815- Solid State Laser Technologies
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Semiconductor Lasers and Optical Devices
- Laser-Plasma Interactions and Diagnostics
- Photorefractive and Nonlinear Optics
- Advanced Fiber Laser Technologies
- Glass properties and applications
- Photonic Crystal and Fiber Optics
- Optical properties and cooling technologies in crystalline materials
- Laser Material Processing Techniques
- Spectroscopy and Laser Applications
- Optical Systems and Laser Technology
- European and Russian Geopolitical Military Strategies
- Laser-induced spectroscopy and plasma
- X-ray Spectroscopy and Fluorescence Analysis
- Adaptive optics and wavefront sensing
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- European Union Policy and Governance
- Advanced optical system design
Czech Academy of Sciences, Institute of Physics
2011-2024
Czech Technical University in Prague
2013-2017
An overview of the latest developments kilowatt-level diode pumped solid state lasers for advanced applications at HiLASE Centre is presented. subcontracted and in-house-developed laser beamlines The aim development to build kW-class delivering picosecond pulses between 1- 100-kHz repetition rates high-energy nanosecond 10 Hz. are based on Yb:YAG thin-disk amplifiers chirped pulse amplification. current status beamlines’ performance reported. advantages zero-phonon line pulsed pumping...
Abstract An overview of the Czech national R&D project HiLASE (High average power pulsed laser) is presented. The focuses on development advanced high repetition rate, diode pumped solid state laser (DPSSL) systems with energies in range from mJ to 100 J and rates 10 Hz kHz. Some applications these lasers research hi-tech industry are also
The development of kW-class diode-pumped picosecond laser sources emitting at various wavelengths started the HiLASE Center four years ago. A 500-W Perla C thin-disk with a diffraction limited beam and repetition rate 50–100 kHz, frequency conversion to mid-infrared (mid-IR), second fifth harmonic frequencies was demonstrated. We present an updated review on progress in compact femtosecond high average power radiation covering ultraviolet (UV) mid-IR spectral range Center. also report...
Detailed modeling results of 100 J class laser systems with respect to the output energy, beam propagation, nonlinear phase accumulation, wavefront aberrations, and adaptive optics performance obtained in MIRÓ MATLAB codes are presented here. The system is based on a cryogenically cooled Yb 3+ ∶YAG multislab amplifier two identical heads operates at 10 Hz repetition rate an average power above 1 kW.
We report numerical and experimental results obtained with an optical setup that simulates the heating cooling processes expected in a multi-slab high-average-power laser head. have tested performance of adaptive optics system consisting photo-controlled deformable mirror (PCDM) Shack-Hartmann wavefront sensor for effective correction generated aberrations. The is characterized different layouts actuator array configurations mechanisms. are benchmarked using PCDM, which allowed us to...
Precise values of absorption, emission and gain cross-sections Yb:YAG, Yb:LuAG, Yb:CaF<sub>2</sub> Yb:FP15-glass at cryogenic temperatures are presented. To obtain the two theoretical approaches were used. The first is McCumber or reciprocity method (RM) which based on absorption spectra. second Fuchtbauer-Ladenburg (FL) using fluorescence From results one can expect significant impact laser performance these materials especially in case high energy class diode pumped solid state lasers.
We present the design parameters of a diode-pumped 100J-class multi-slab Yb:YAG laser at 10 Hz scalable to kJ regime. Results detailed energetics and thermo-optical modeling confirm viability cryogenic helium-gas cooling approach drastically reduce thermally-induced distortions in slabs. In addition, comparison spectral measurements from laser-diode stacks crystals validates feasibility highly efficient solid-state lasers temperatures.
High average power picosecond Yb:YAG thin-disk lasers are being developed at Hilase. A compact 1 mJ/100 kHz and 4 zero-phonon-line-pumped regenerative amplifiers PERLA C with a CVBG compressor provide <2 ps long pulses in nearly diffraction-limited beam. The output was successfully converted to 2nd 4th harmonic frequency high conversion efficiency. energy, QCW-pumped beamline B is operated 45mJ/1kHz fundamental spatial mode pulse length < 2ps. Its second stage amplifier assembled 1.8 J...
We introduce the Czech national R&D project HiLASE which focuses on strategic development of advanced high-repetition rate, diode pumped solid state laser (DPSSL) systems that may find use in research, high-tech industry and future European large-scale facilities such as HiPER ELI. Within we explore two major concepts: thin-disk cryogenically cooled multislab amplifiers capable delivering average output powers above 1 kW level picosecond-to-nanosecond pulsed regime. In particular, have...
We present calculation of aberration compensation in high average power multi-slab laser by a deformable mirror. The calculations were compared with simple experiment. For the we have developed code that works square-shaped piston driven push/pull mirror continuous facesheet and allows optimization parameters actuator array geometry. corrected calculated output wavefront Hilase 10 J system MIRÓ using several geometries. numerical results benchmarked on an experimental model chamber membrane
In this work, we present a comparative study of high power diode stacks produced by world's leading manufacturers such as DILAS, Jenoptik, and Quantel. The diode-laser are characterized central wavelength around 939 nm, duty cycle 1 %, maximum repetition rate 10 Hz. characterization includes peak power, electrical-to-optical efficiency, full width at half (FWHM) function current cooling temperature. A cross-check measurements performed HiLASE-IoP Ferdinand-Braun-Institut (FBH) shows very...
We present a comparison of two conceptual layouts 100 J class laser systems for HiLASE and ELI Beamlines projects with respect to the output energy, beam propagation system performance obtained from MIRO code. Both are based on cryogenically cooled Yb:YAG multi-slabs amplifiers technology operate at 10 Hz repetition rate average power above 1 kW. First concept consists separate preamplifier amplifiers, while second main amplifier identical heads delivering J.
We present a comparison of two alternative laser layouts for HiLASE and ELI Beamlines projects. The cryogenically cooled is 100 J class with 2 ns pulse length operates at 10 Hz repetition rate. beam intended industrial applications in HiLASE, OPCPA pumping can serve as test bed large scale high rate fusion lasers. First layout utilizes classical scheme preamplifier main amplifier, while the second single amplifier heads. based on results obtained from homemade MATLAB code evaluation...
We report a high power Yb:YAG thin disk laser with cylindrical vector polarization incorporating an intracavity S-waveplate. By adjusting the angle of S-waveplate in resonator, we could select state output, radial or azimuthal polarization, resonator. The yielded ⪆10 W both polarized output for incident pump 131 continuous-wave mode operation, corresponding to slope efficiency ⪆18%. Output characteristics will be discussed detail.
We report an extremely compact LD stack pumped thin-disk laser module. The non-suitable pump spot shape which is obtained ordinal fiber coupled pumping was compensated by optimizing optical elements geometry and configuration.
We are developing one joule energy and picosecond pulse duration laser system at the repetition rate of 120 Hz based on Yb-doped solid-state materials. The amplified output from thin disk regenerative amplifier is by a cryogenically conduction cooled single slab amplifier. In this work, we also present new measurement method gain distribution insensitive to mode matching. One advantages fact that it provides real dimensions distribution. Knowledge about allows find optimum spatial matching...
An overview of Czech national R&D project HiLASE (High average power pulsed LASEr) is presented. The aims at development DPSSL for hi-tech industrial applications. will be a user oriented facility with several laser systems output parameters ranging from few picosecond pulses energy 5 mJ to 0.5 J and repetition rate 1-100 kHz (based on thin disk technology) 100 in nanosecond 10 Hz multi-slab technology).
Abstract We present results on development and experimental implementation of a 1-kHz, coherent extreme ultraviolet (XUV) radia- tion source based high-order harmonic generation the femtosecond, near-infrared laser pulses produced by titanium-doped sapphire system (35 fs, 1.2 mJ, 810 nm) at Institute Physics AS CR / PALS Centre. The comprises low-density static gas cell filled with conversion medium, typically argon. comprehensive optimization XUV has been performed respect to major...
We investigated wavefront aberrations in a cryogenically cooled Yb:YAG slab with sensor using probe beam technique under non-lasing condition. To analyze the pump-induced phase created crystal, measured wavefronts were fitted orthonormal Zernike polynomials. The crystal of 2 mm thickness, 10 diameter, and 3 at.% doping concentration was mounted copper holder closed-loop pulse tube cryostat cooling capacity 12 W at 100 K. gain medium single-end pumped by fiber-coupled laser diode pumping...
We are developing joule level picosecond pulse duration laser system operating at repetition rate of 120 Hz. The consists a seed mode-locked fiber and two cryogenically cooled amplifier stages: single slab regenerative multi-pass amplifier. have found the displacement probe beam caused by mechanical vibrations cryostat is less than 0.7 mrad. also improved our in-situ gain measurement decreasing spectral line narrow band source down to 50 pm. that emission bandwidth Yb:YGAG 160 K around 7 nm.
A prototype solid state picosecond laser is reported for single shot laser-Compton bio-imaging applications. The target specification 1J, 1ps at 120Hz with good beam quality precise pointing to 10 m focused 43MeV electron 1nC charge. 0.1J stretched pulse obtained from a thin disc Yb:YAG laser, and amplified through cryogenically cooled Slab module in multipass configuration. Temperature dependent gain characteristics analysed concluded as the designed optimization sufficient long time...