Published in Physics of Wave Phenomena
AbstractIt is experimentally found that at the tuning of the laser diode lasing wavelength in a spectrally selective external resonator to the shortwave region of the spectrum a range of wavelengths is manifested for which lasing depends on the previous state of the system, namely, at the shortwave boundary of the lasing spectrum there is a region ...
Published in Physics of Wave Phenomena
AbstractA microscopic-size droplet levitates steadily in a vapor–air flow rising upward over a locally heated thin water layer. A Fourier analysis of the droplet position during a high-speed video recording revealed small-amplitude high-frequency droplet oscillations. This study focuses on overcoming the noise hindering extraction of oscillatory mo...
Published in Physics of Wave Phenomena
AbstractA complex study of the structure and rock composition of an exploited oil and gas field on the Yamal Peninsula (Russia) has been performed. The experimental equipment, based on an original deep ground-penetrating radar (GPR) GROT 12, included also a seismic sensing complex. GPR transects and hodograph images have been obtained. The GPR data...
Published in Physics of Wave Phenomena
AbstractThe published data on the structural and dynamic features of water in nanosized water pool of reverse microemulsions of surface-active substances (SASs) in organic solvents and nondetergent drops of the same size are reviewed. The influence of water pool sizes and the sign of SAS charge is considered. The emphasis is on the well-studied mic...
Published in Physics of Wave Phenomena
AbstractInterferometric processing of hydroacoustic information using a vertical linear array is described. A relationship is found between the spectral density of the two-dimensional Fourier transform of the interference pattern formed by a moving broadband noise source and the number of the array elements. The array gain and the noise immunity of...
Published in Physics of Wave Phenomena
AbstractKinetics of continual thermal emission spectra of Er2O3 polycrystals is experimentally studied at laser-thermal excitation by single submicrosecond CO2 laser pulses at λ = 10.6 µm. The nature and kinetics of Er2O3 and other oxides are explained by the conversion of the thermal energy of the crystal lattice into continual Plank’s radiation. ...
Published in Physics of Wave Phenomena
AbstractWe investigate the complex nonlinear dynamics of quantum well InGaN blue laser diodes that operate at 446-nm wavelength. For this purpose, we use the rate equation model of the multi-quantum well (MQW) semiconductor LD that considers two separate quantum wells with different carrier densities and includes self-, symmetric, and asymmetric cr...
Published in Physics of Wave Phenomena
AbstractPulsed vacuum ultraviolet (VUV) radiation (80–180 nm) emitted by laser plasma produced on a metal target is used in mass spectrometry to ionize volatile organic compounds at atmospheric pressure. The parameters of light emitted by the laser plasma generated by a pulsed Nd:YAG laser radiation at a wavelength of 1064 nm, power density of abou...
Published in Physics of Wave Phenomena
AbstractThe frequency-space amplitude and phase structure of the hydroacoustic source pressure fields in shallow water is analyzed. It is shown that the motion of a source or a receiver with a moderate velocity or the longitudinal arrangement of an extended multielement array results in formation of lines with a constant phase of the sound pressure...
Published in Physics of Wave Phenomena
AbstractWe have studied the influence of detuning of quasimonochromatic seeding vacuum ultraviolet (VUV)/X-ray radiation from the frequency of the inverted transition of the hydrogen-like active medium of the plasma-based X-ray laser dressed by an intense infrared (IR) laser field on the formation of a subfemtosecond pulse train. For the active med...
