A5024095829- Optical Coatings and Gratings
- Advanced Fiber Laser Technologies
- Surface Roughness and Optical Measurements
- Laser-Matter Interactions and Applications
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Spectroscopy Techniques in Biomedical and Chemical Research
- Solid State Laser Technologies
- Advanced optical system design
- Spectroscopy and Laser Applications
- Laser Material Processing Techniques
- Advanced Measurement and Metrology Techniques
- Photonic Crystals and Applications
- Photonic Crystal and Fiber Optics
- Advanced Surface Polishing Techniques
- Spectroscopy and Quantum Chemical Studies
- Spectroscopy and Chemometric Analyses
- Photorefractive and Nonlinear Optics
- Optical Polarization and Ellipsometry
- Advanced Fiber Optic Sensors
- Laser-induced spectroscopy and plasma
- Laser-Plasma Interactions and Diagnostics
- Mass Spectrometry Techniques and Applications
- Quantum optics and atomic interactions
- Laser Design and Applications
Max Planck Institute of Quantum Optics
2016-2025
Ludwig-Maximilians-Universität München
2013-2025
Joint Attosecond Science Laboratory
2025
Carl Zeiss (Germany)
2022
Lomonosov Moscow State University
2007-2016
Moscow State University
2006-2016
Institute of Mathematical Problems of Biology
2003-2016
Max Planck Society
2012-2016
Computing Center
1997-2008
Laser Zentrum Hannover
2007
The authors' experience with the application of needle optimization technique to design optical coating is summarized. A physical interpretation provided, and its main features are identified. Guidelines on various types problems given.
Thin films of Ge, ZnS, YbF3, and LaF3 produced using e-beam evaporation on ZnSe Ge substrates were characterized in the range 0.4-12 µm. It was found that Sellmeier model provides best fit for refractive indices substrate, films; Cauchy YbF3 film. Optical constants substrate film as well extinction coefficients LaF3, are presented frame a non-parametric model. For coefficient exponential is applicable. Stresses estimated equal to (-50)MPa, (-400)MPa, 140 MPa, 380 respectively. The surface...
One-micrometer wavelength ultrafast laser emission is transformed to a powerful tool for ultrabroadband mid-infrared spectroscopy.
Health state transitions are reflected in characteristic changes the molecular composition of biofluids. Detecting these parallel, across a broad spectrum species, could contribute to detection abnormal physiologies. Fingerprinting biofluids by infrared vibrational spectroscopy offers that capacity. Whether its potential for health monitoring can indeed be exploited critically depends on how stable fingerprints (IMFs) individuals prove over time. Here we report proof-of-concept study...
Design approaches for optical thin films that recognize the key role of a design's total thickness are presented. These based primarily on needle optimization technique but also utilize other procedures. Using described design approaches, an coating engineer can obtain set theoretical designs with different combinations principal metrics (merit function value, number layers, and thickness); this extends opportunities choosing most practical manufacturable design. We show some problems have...
We report the feasibility of precision broadband dispersion control with multilayer mirrors produced in a single coating run. Inherent fluctuations group-delay (GDD) are suppressed by using at two different angles incidence. With specialized version needle optimization algorithm, we have designed structure to yield complementary pair resultant GDD substantially free from spectral oscillations characteristic chirped multilayers. Since employed incidence deposition run, their overall is more...
We present an efficient method for compressing sub-picosecond pulses at 200 W average power with 2 mJ pulse energy in a multipass cell filled different gases. demonstrate spectral broadening by more than factor of five using neon, argon, and nitrogen as nonlinear media. The 210 fs input are compressed down to 37 35 GW peak beam quality 1.3×1.5 throughput >93%. This concept represents excellent alternative hollow-core fiber-based compression schemes optical parametric amplifiers (OPAs).
Waveform-stabilized laser pulses have revolutionized the exploration of electronic structure and dynamics matter by serving as technological basis for frequency-comb attosecond spectroscopy. Their primary sources, mode-locked titanium-doped sapphire lasers erbium/ytterbium-doped fibre lasers, deliver with several nanojoules energy, which is insufficient many important applications. Here we present waveform-stabilized light source that scalable to microjoule energy levels at full (megahertz)...
For experiments in plasma, nuclear, and high-energy physics, there is a strong demand for laser pulses exhibiting relativistic intensity, few-cycle pulse duration, very high contrast.Here we present picosecond-pumped optical parametric chirped amplification (OPCPA) system delivering at 10 Hz repetition rate with the following key parameters: compressed duration of less than 7 fs (close to Fourier limit), contrast better 11 starting from 1 ps before main pulse, peak intensity 6.9 × 19 W∕cm 2...
Mathematical and computational evidence that strongly suggests optimal solutions exist to single-band, normal-incidence antireflection coating problems is presented. It shown efficient synthesis refinement techniques can quickly accurately find such solutions. Several visible infrared examples are presented support this claim. Graphs show the expected performance for different representative substrates, refractive-index ratios, wavelength ranges, overall optical thickness combinations given....
Several modern optical coating designs tools are discussed in the frame of a new design paradigm proposing search not for formally optimal solution with lowest possible merit function value but most practical that takes into account additional feasibility demands. Considered include stochastic optimization procedure upper and lower constraints layer thicknesses. This allows one to obtain multiple solutions problem, which presents opportunities choosing practically design. Two special...
We developed a high repetition rate optical parametric chirped-pulse amplification (OPCPA) laser system based on fiber-laser-seeded Innoslab to generate few-cycle pulses around 2 µm with passively stable carrier-envelope phase (CEP) by difference frequency generation (DFG).Incorporating piezo mirror before the DFG stage permits rapid CEP control.The OPCPA is seeded supercontinuum generated in bulk material picosecond pulses.Few-cycle durations of 17 fs and energies over 100 μJ were produced...
Electro-optic sampling of infrared electric fields has set sensitivity and dynamic-range records in broadband molecular vibrational spectroscopy. Yet, these works, the 1-second-scale single-trace acquisition time leads to intra-scan noise accumulation restricts throughput measurements multiple samples dynamic processes. We present a dual-laser-oscillator approach capturing 2800 mid-infrared waveforms per second by scanning relative delay between sampled waveform gate pulses using modulated...
We present a theoretical approach enabling one to perform preproduction investigation of the effect accumulation thickness errors in course optical coating production using broadband monitoring. On basis this we investigate and compare that may be associated with such factors as random systematic measurement data, instabilities deposition rates, inaccuracies on-line algorithms predicting termination instants for layer depositions.
Wavelength dependencies of refractive indices thin film materials differ for various deposition conditions, and it is practically impossible to attribute a single index wavelength dependence any typical material. Besides objective reasons, differences in the optical parameters films may also be connected with nonadequate choices models algorithms used processing measurement data. The main goal this paper present reliable most widely slightly absorbing oxide materials. These can by other...
The production of polarizers for high-intensity applications based on a ZrO2/SiO2 pair thin film materials is discussed. A special approach to accurate determination ZrO2 refractive index and the application direct broadband optical monitoring enable obtaining good manufacturing results.
It is well known that the spectral transmittance and reflectance of a thin film can be influenced by even small inhomogeneities or variations in its complex refractive-index profile. Formulas are derived describe theoretical variation characteristics for changes refractive index extinction coefficient homogeneous film. These formulas, accurate to first order change index, compared with exact calculations number different types inhomogeneities. shown specific qualitative features profile...
Computational manufacturing of optical coatings is a research area that can be placed between theoretical designing and practical in the same way computational physics experimental physics. Investigations this have been performed for more than 30 years under name computer simulation monitoring processes. Our goal to attract attention increasing importance at current state art design manufacture demonstrate possible applications tool.
A new model for the determination of group delay (GD) and GD dispersion dispersive mirrors is presented. The algorithm based on this enables one to process interferometric data provided by a white-light interferometer obtain wavelength dependence over broad spectral range.