A5112582329- Photochemistry and Electron Transfer Studies
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Laser Design and Applications
- Particle physics theoretical and experimental studies
- Advanced Fiber Laser Technologies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Solid State Laser Technologies
- Free Radicals and Antioxidants
- Semiconductor Lasers and Optical Devices
- Nonlinear Optical Materials Studies
- Material Properties and Applications
- Quantum Information and Cryptography
- Ferroelectric and Piezoelectric Materials
- Photonic and Optical Devices
- Inorganic and Organometallic Chemistry
- Organic Chemistry Cycloaddition Reactions
- Synthetic Organic Chemistry Methods
- Photopolymerization techniques and applications
- Glass properties and applications
- Black Holes and Theoretical Physics
- Photochromic and Fluorescence Chemistry
- Microwave Dielectric Ceramics Synthesis
- Dye analysis and toxicity
Novosibirsk State University
2007-2024
Budker Institute of Nuclear Physics
2007-2024
MIREA - Russian Technological University
2024
Moscow Polytechnic University
2017-2023
Siberian Branch of the Russian Academy of Sciences
2007-2018
Bauman Moscow State Technical University
2016
Moscow State Industrial University
2015
Russian Academy of Sciences
2011-2014
National Research Tomsk State University
2004
Optolink (Russia)
2000-2003
The proof of the multi-Regge form multiple production amplitudes in next-to-leading logarithmic approximation is presented for Yang-Mills theories with fermions and scalars any representations color group Yukawa-type interaction. Explicit expressions Reggeized gauge boson trajectory, Reggeon vertices, impact factors are given. Fulfillment bootstrap conditions proved.
Using the path-integral technique we examine mutual information for communication channel modeled by nonlinear Schr\"odinger equation with additive Gaussian noise. The is one of fundamental models in physics, and it has a broad range applications, including fiber optical communications---the backbone internet. At large signal-to-noise ratio present through path-integral, which convenient perturbative expansion nonlinearity. In limit small noise nonlinearity derive analytically first nonzero...
We consider a model nondispersive nonlinear optical fiber channel with an additive Gaussian noise. Using Feynman path-integral technique, we find the optimal input signal distribution maximizing channel's per-sample mutual information at large signal-to-noise ratio in intermediate power range. The allows us to improve previously known estimates for capacity. calculate output entropy, conditional and Gaussian, half-Gaussian, modified distributions. demonstrate that range capacity (the...
A method for measuring the average longitudinal polarization of electron beam at an electron-positron collider operating near $J/ψ$ resonance is proposed. The utilizes differential cross-section $J/ψ\to [Λ\to pπ^-][\barΛ\to\bar{p}π^+]$ decay. It can be used to measure electrons with statistical precision better than $10^{-3}$ a Super Charm-Tau factory luminosity $10^{35}~\mathrm{cm}{}^{-2}\mathrm{s}{}^{-1}$. discussed in context weak mixing angle measurement same experiment.
Photophysical processes proceeding in polyatomic organic molecules (pyran derivatives and cyanines) excited by high-power laser radiation at 532 nm are studied. Some properties of their changes depending on the structure, solvent, excitation conditions determined. The effect limitation exciting is found. maximum (Kmax = 15.0 initial transmission equal to 70%) was observed for cyanine derivative comparable this fullerenes C60, which widely used as limiters.
This paper reports on the laser emission properties of Pyrromethene 580, 597, 650 and Rhodamine 11B in novel matrix polymer-filled microporous glass (PFMPG). host material combines advantages an organic environment for dye with superior thermooptical mechanical inorganic glass. Laser efficiency was measured as a function pump flux different concentrations, resonator feedback, locations sample. Service life, defined number pulses output to drop 70% point, recorded at 5 Hz higher...
We consider the optical fiber channel modeled by nonlinear Schrödinger equation with zero dispersion and additive Gaussian noise. Using Feynman path-integral approach for model, we find corrections to conditional probability density function, output signal distribution, entropies, capacity at large signal-to-noise ratio. demonstrate that correction is positive power. Therefore, this increases earlier calculated a nondispersive in intermediate power region.
The conversion efficiency and service life of the laser elements based on a polymer-filled microporous glass (PFMPG) composite doped with organic dyes are studied. It is shown that both achieve values obtained for same in bulk polymer elements. Good lasing characteristics studied advantageously combined high mechanical strength damage resistance excellent thermooptical properties PFMPG composite.
The lasing properties and photostability of eighteen aminocoumarins in polymethyl methacrylate, methyl ethanol excited by an excimer XeCl laser are studied. It is shown that coumarins with a fluorinated group substituents the third position molecule can be promising active media for lasers on polymer matrices doped dyes.
The nonlinear transmission of high-power 532-nm and 308-nm laser pulses duration 7–13 ns by solutions porphyrins phthalocyanines their metal complexes (13 compounds) is studied. limitation optical radiation at wavelengths 532 308 nm studied depending on the intensity, solvent type, concentration solutions. effective cross sections for absorption excited molecules are estimated. induced short-lived in visible spectral region range hundreds nanoseconds. mechanisms discussed.
Using the path-integral technique we calculate mutual information for fiber optical channel modelled by nonlinear Schrödinger equation with additive Gaussian noise. At large signal-to-noise ratio (SNR) present through which is convenient perturbative expansion both in nonlinearity and dispersion. In leading order 1/SNR demonstrate that determined averaged logarithm of normalization factor Λ conditional probability density function P[Y|X]. limit small noise derive analytically first nonzero...
In our previous paper [Terekhov et al., Phys. Rev. E 95, 062133 (2017)2470-004510.1103/PhysRevE.95.062133] we considered the optical channel modeled by nonlinear Schrödinger equation with zero dispersion and additive Gaussian noise. We found per-sample capacity for this model. present extend model introducing initial signal dependence on time output detection procedure. The proposed is a closer approximation of realistic communications link than where there no time. For correlators both...
Two-photon fluorescence was observed for 18 organic dyes in a polymethyl methacrylate (PMMA) matrix excited by femtosecond Ti:sapphire laser. The product of the cross section two-photon absorption quantum yield (two-photon section) is estimated comparing it with Rhodamine 6G ethanol. Using this parameter, are selected that exhibit most intense PMMA and their concentrations optimised. Coumarin rhodamine polymer matrices proposed using as visualisers radiation laser detectors self-triggering systems.
We consider a model nondispersive nonlinear optical fiber channel with additive Gaussian noise at large SNR (signal-to-noise ratio) in the intermediate power region. Using Feynman path-integral technique we find optimal input signal distribution maximizing channel's per-sample mutual information. The finding of allows us to improve previously known estimates for capacity. show that regime information is greater than and half-Gaussian distributions.
We consider a model nondispersive nonlinear optical fiber channel with additive white Gaussian noise at large $\mathrm{SNR}$ (signal-to-noise ratio) in the intermediate power region. Using Feynman path-integral technique we for first time find optimal input signal distribution maximizing channel's per-sample mutual information. The finding of allows us to improve previously known estimates capacity. output entropy, conditional and information are calculated Gaussian, half-Gaussian modified...
Lasing properties and photostability of 4,4'-CO2C4H9-bis-substituted para-terphenyl azacoumarin (AC1F), emitting under excimer XeCl laser pumping in the blue-green spectral region, pyrromethene 580 phenalemine 512, Cu red were studied PMMA matrix ethanol solutions.