Journal of Russian Laser Research
Journal of Russian Laser Research is based on the best Russian research in the field of lasers. It is based on research selected for its timeliness and importance to this rapidly growing field.
Research carried out under the auspices of the prestigious P. N. Lebedev Physical Institute of the Russian Academy of Sciences will form the core of this journal. Coverage includes carefully selected current research in traditional areas such as laser physics; nonlinear optics; laser-stimulated chemistry; laser applications; laser spectroscopy; laser interactions with matter and plasma; laser pumping; properties of laser beams; and solid-state, gas, liquid, chemical, and semiconductor lasers, as well as in new areas such as quantum optics and quantum information processing.
The foundations of quantum theory in laser physics, including quantum mechanics and its applications in developing quantum technologies oriented on creating quantum computing devices and modern quantum communication facilities, as well as quantum cryptography are in the scope of the Journal of Russian Laser Research.
All articles are peer-reviewed.
More information is available at the editors' website via the following link:
http://sites.lebedev.ru/JRLR/show.php?page_id=0
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Vol 40, No 6 (2019)
- Year: 2019
- Articles: 12
- URL: https://journals.rcsi.science/1071-2836/issue/view/15536
Article
Probability Representation of Photon States and Tomography†
Abstract
We give a review of the tomographic probability representation of quantum mechanics. We present the formalism of quantum states and quantum observables using the formalism of standard probability distributions and classical-like random variables. We study the coherent and number states of photons in the probability representation and obtain the evolution equation and energy spectra in the form of equations for probability distributions.
503-514
Classical Behavior of Nonclassical Quantum States
Abstract
We use a new formulation of nonclassicality in weak measurements based on the probabilistic behavior of “weak quasimoments” to show that nonclassical quantum states in the Glauber–Sudarshan representation can behave classically in weak measurements with post-selection. We directly calculate marginal quasidistributions related to the “weak quasimoments” and show that they are nonnegative.
515-521
New Entropic Inequalities for Qudit (Spin j = 9/2)
Abstract
We consider information characteristics of a single qudit (spin j = 9/2), such as the von Neumann entropy, and define the von Neumann mutual information for this system, which does not contain any subsystems. In addition, we consider the von Neumann information of a qudit toy model as a function of real parameters. The inequalities obtained describe the quantum hidden correlations in the single-qudit system.
522-529
Propagation Characteristics of Higher-Order Mixed-Pattern Solitons in Nonlinear Media
Abstract
In this paper, we study the propagation and evolution of higher-order mixed-pattern solitons in nonlinear media with a strong nonlocality. The propagation analytic formula of higher-order mixed-pattern solitons is derived and discussed in detail. Taking the fourth-order mixed-pattern solitons as an example and based on numerical calculations, we present the variations of second-order moment beam width, the light intensity, and the wavefront curvature. We show that the propagation evolution exhibits unique characteristics depending on different relative factors of higher-order mixed-pattern solitons. The influence of the beam order on the propagation evolution is also discussed.
530-539
Ultrastable Laser System for Spectroscopy of the 1.14 μm Inner-Shell Clock Transition in Tm and Its Absolute Frequency Measurement
Abstract
We characterize a 1.14 μm ultrastable semiconductor laser system for precision spectroscopy of Tm inner-shell clock transition using a frequency comb. We stabilize both the repetition and the carrierenvelope offset frequencies of a commercial Ti : sapphire femtosecond laser to a passive hydrogen maser using a home-built f-2f interferometer. By measuring the absolute frequency of the 1.14 μm laser stabilized to a high-finesse ULE cavity, we determine the zero-expansion temperature point of the cavity and the rate of linear drift of the the cavity resonance frequency due to “aging” of the ULE glass. We achieve less than 10 Hz frequency instability of the laser within 1,000 s after the linear drift compensation. We also measured the absolute frequency of the 1.14 μm transition in Tm to be 262 954 938 269 213(30) Hz.
540-546
On Master Oscillator of Laser-Electron X-Ray Generator
Abstract
We propose a new design for the master oscillator of a medical Thomson laser-electron generator. By means of numerical simulations, we show that negative optoelectronic feedback together with highfrequency modulation (5 GHz used in accelerators) allows one to single out one pulse not longer than 15 ps in the axial interval, as well as to synchronize the pulse with the accelerator system.
547-553
Stimulated Raman Scattering in Photonic Crystals Infiltrated with Raman-Active Liquids
Abstract
Under ruby-laser excitation, we register stimulated Raman scattering (SRS) in different liquids, which are active in Raman scattering (water, ethanol, acetone) and are infiltrated into pores of synthetic opal matrices. We show that the SRS conversion efficiency is essentially higher than that for corresponding bulk materials. We demonstrate the possibility to use such a method for the determination and spectral analysis of small amounts of substances. In the samples under study, we observe the fine structure of the first SRS component coinciding in frequency with the spectral shift of stimulated low-frequency Raman scattering of light in an opal matrix caused by the transmission of vibrations from silica globules forming the opal matrix.
554-558
Elemental Image Generation Algorithm Using Reverse Iteration Along Optical Path
Abstract
We propose a fast elemental image generation algorithm for integral imaging display based on depth information and a two-dimensional scene image. Existing elemental image generation algorithms establish many-to-one mappings from the scene to the elemental image, thereby including redundant calculations. The improved algorithm entails establishing a single mapping from elemental image to the scene. Each pixel in the elemental image matches a unique scene pixel by inverse iteration along the optical path. This establishes a high precision matching and eliminates hole caused by depth discontinuities. In this paper, we obtain a unique mapping solution by inverse iteration along the optical path using a one-pixel step. The time complexity of this algorithm is mainly driven by the pixel sum of the elemental image array. We generate the elemental image seven times faster than the original algorithm. The larger total quantity of the scene pixels further demonstrates the advantages of our algorithm. The experiments show that the update rate can reach more than 30 fps according to the VCD standard (352×240 resolution) using four parallel calculation threads with a four-core Intel® Core(TM) i7-7500U 2.70 GHz CPU despite various delay factors. The results verify the correctness of the theoretical analysis.
559-570
Raman Spectroscopy Investigation of Polytetrafluoroethylene in Different Zones of Impact of Continuous CO2 Laser Radiation
Abstract
The surface of polytetrafluoroethylene (PTFE) irradiated with an IR laser was investigated by Raman spectroscopy. The degree of change in the surface depends on the fluence of the radiation and on the impact zones around the center spot of the laser beam. New absorption bands detected in the spectrum of the irradiated polymer indicate the formation of CF3 groups as a result of the destruction of the polymer chain. Polymer chain carbonization is also observed under laser irradiation. The process of structural changes in laser irradiated PTFE is refined on the basis of obtained microphotographs of the supramolecular structure. Density functional theory calculations are used to help in interpreting the Raman spectra.
571-580
Ultraviolet Laser Patterning of Fluorine-Doped Tin Oxide with Different Radiation Directions
Abstract
Selective laser patterning of thin films in a multilayered structure is an emerging technology for fabricating optoelectronics and microelectronics devices. As the application of ultraviolet (UV) lasers is more and more popular in electronics manufacturing, in this study, we compare UV laser patterning of fluorine-doped tin oxide (FTO) films from the front and back sides. We summarize a formula for calculating the focus offset in back-side ablation (BSA) and analyze systematically the relationships between the laser ablation crater size, the damage on glass substrate, and the laser ablation parameters. In addition, the laser ablation process and mechanisms of the BSA and the front-side ablation (FSA) are also elaborated in this paper.
581-589
Stimulated Raman Scattering in Microcrystalline Powder of Barium Nitrate
Abstract
For the first time, stimulated Raman scattering is detected in microcrystalline powder of barium nitrate under excitation by ultrashort (60 ps) pulses of a YAG:Nd3+ laser operated at a wavelength of 532 nm. First and second Stokes components with a frequency shift of 1047 cm−1 are observed in the stimulated Raman scattering spectrum of the powder. Spectra observed in the microcrystalline powder were juxtaposed with the corresponding spectra of spontaneous and stimulated Raman scattering in a Ba(NO3)2 single crystal. The studies performed open the possibility for creating lasers based on stimulated Raman scattering in microcrystalline powders of inorganic compounds with various molecular groups.
590-592
Correction
593-593