A5075455704- Digital Holography and Microscopy
- Optical measurement and interference techniques
- Laser-Plasma Interactions and Diagnostics
- Fusion materials and technologies
- Advanced Optical Imaging Technologies
- Plasma Diagnostics and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Nuclear reactor physics and engineering
- Random lasers and scattering media
- Advanced X-ray Imaging Techniques
- Image Processing Techniques and Applications
- Field-Flow Fractionation Techniques
- Magnetic confinement fusion research
- Adaptive optics and wavefront sensing
- Vacuum and Plasma Arcs
- Optical Systems and Laser Technology
- Laser Material Processing Techniques
- Microfluidic and Bio-sensing Technologies
- Anodic Oxide Films and Nanostructures
- Laser-Ablation Synthesis of Nanoparticles
- Spectroscopy and Chemometric Analyses
- Photorefractive and Nonlinear Optics
- Diamond and Carbon-based Materials Research
- Electrowetting and Microfluidic Technologies
- Fluid Dynamics and Heat Transfer
Immanuel Kant Baltic Federal University
2015-2024
Institute for Laser Technology in Medicine and Measurement Technique
2019-2022
University of Stuttgart
2011-2019
Universität Ulm
2019
In the International Thermonuclear Experimental Reactor under construction in southern France, there will be a need for continuous measuring of erosion at wall, after reactor starts operating. A two-wavelength interferometric technique based on digital holography is proposed measurement. This has ability to tackle challenging environmental conditions within by long-distance measurement, where relay optic used imaging investigated surface detector. We show that shape measurements objects...
In this paper, we propose a dual-wavelength digital holographic interferometry method based on compact dual vertical-cavity surface-emitting laser (VCSEL) source. The source simultaneously emits light from two highly stabilized coherent sources with slightly different wavelengths. A and adjustable current enables the application of techniques to measure shape an object height steps few millimeters. wavelength drift over 12 h entire measurement range, which was evaluated using wavemeter,...
In this paper, we demonstrate digital holographic imaging through a 27-m-long fog tube filled with ultrasonically generated fog. Its high sensitivity makes holography powerful technology for scattering media. With our large-scale experiments, investigate the potential of road traffic applications, where autonomous driving vehicles require reliable environmental perception in all weather conditions. We compare single-shot off-axis to conventional (with coherent illumination) and show that...
Testing with a single holographic lens or grating in collimated beam is normally not possible because of the inherent tilt caused wavefront. The between two beams shearing creates large number linear fringes which overshadow information about However, here, we show that can use this to make quantitative measurements was otherwise possible. In novel method, obtain shear relatively simple way, and at same time extract phase using spatial Fourier transform technique. This technique suitable for...
In this article, we describe a system suitable for the evaluation of residual stress in ceramic coating under industrial conditions.Laser ablation is used material removal, and digital holography measures displacements produced by release around processed area.The stresses at different depths below surface are calculated finite element method from displacements, shapes machined surface, parameters.Experimental results presented.
Advances in information technology open up the potential of combining optical systems with net based infrastructures, allowing for remote inspection and virtual metrology. In this paper, we report our recent work on building a laboratory digital holographic We describe architecture techniques involved setting controlling metrology system. Further consideration will be given to integration into an advanced infrastructure experimentation, data storage publication. Some other important issues...
Goals and objectives: to identify niches for studying the Russian antitumor drug “AntionkoRAN-M” (INN Stimothimagen copolymerplasmid) within framework of phase 2 3 clinical studies further use in medical practice. Materials methods: during study, a review recommendations Ministry Health Federation NCCN management number oncological diseases treatment which could potentially be used was carried out. Further analysis identified groups patients that differed from each other available options,...
In this paper, we consider the method for observing and detecting of high-frequency pulsed plasma spark discharge by means stroboscopic digital holographic interferometry to demonstrate feasibility electron concentration assessment in nonthermal plasma. A with a 5 kHz frequency 1250 ns duration has been exited between two electrodes atmospheric pressure. The sequence holograms acquired due proper synchronization pulses, laser radiation, camera's frame grabbing that ensure recording pulses at...
Abstract This article discusses the fabrication and performance of a multi-channel fibre switch, consisting 19 single-mode fibres, with enhanced coupling efficiency due to micro-optics, directly printed via two-photon-polymerization on end-face each fibre. The use high-resolution not only allows enhancement respect device in but likewise offers great freedom arrangement used fibres. letter gives thorough explanation method as well optical simulations for lenses assembly.
The results of a study plasma jet atmospheric-pressure helium driven by capacitive discharge using sine and pulsed modes excitation are presented. homogeneous multi-channel at gas temperature 34 °C flow rate 0.5 L/min was achieved with short pulse excitation. A digital holography method is proposed to estimate basic parameter, i.e., its electron concentration. An automated holographic interferometry set-up for the observation nonthermal in mode developed described. synchronization features...
In the International Thermonuclear Experimental Reactor (ITER) Project, under construction in southern France, there will be a need for continually measuring erosion at wall, after machine starts operating. A multiple wavelength interferometric technique based on digital holography is proposed measurement. This has ability to tackle challenging environmental conditions within reactor by long distance measurement, where relay optic used imaging investigated surface detector. We show that...
A method of dual-wavelength digital holographic interferometry for analyzing and controlling surface shape technical applications, including surfaces exposed to high-temperature plasma in fusion reactors, is presented. The capability applying the both using miniature vertical-emitting diodes (VCSEL) conventional wavelength-tunable lasers shown. research based on interferometry, which phases wave fronts reflected from object detected at different wavelengths are compared provide information...
In this paper we perform results of laser induced apoptosis and necrosis stages study in live rats cancer cells. Induction cell death was carried out at various conditions power time exposure. Stages were controlled by optical microscopy. During process, Raman spectra apoptotic necrotic cells registered Centaur U HR science unit equipped with 532 diode laser. We focused on detection signal intensity level bands position as markers stages. Both single groups investigated using scattering...
Ytterbium nanoparticles have been fabricated by means of metal film fs-laser ablation in heptane with surface active reagent (SAR). The micellar solution the process acquired a brown color. laser was carried out on Theta 25/30 AVESTA (Russia) femtosecond pulsed unit energy 5 and 10 μJ. prepared equal volume 5-times pouring glass surface. Metallic ytterbium thin films were also from Yb powder ton pressure. samples studied Raman spectroscopy method excitation wavelength 473 nm.
Experimental results of remote shape measurements objects located at a distance more than 6 m from the detector with depth accuracies 10 μm are presented. The system is planned for erosion inside ITER Tokamak reactor.