Energy Parameters and Spectral Characteristics of Lasing of a Liquid Dye Drop Incorporating Nanoparticles

The spectral characteristics and the energy parameters of the fluorescence of a liquid rhodamine-6G dye drop incorporating suspended TiO₂ nanoparticles are presented. It is demonstrated that the lasing threshold for modes of the whispering gallery of liquid dye drops is halved in the presence of nanoparticles.     

Electrical Parameters of a Laser Beam Channel in the Atmosphere. II

Russian Physics Journal - Results of measurements of the conductivity and electric field strength in the laser radiation propagation channel and near it are presented. An experimental setup and...     

Spontaneous soliton formation with a saturated nonlinearity in a weakly nonlinear medium

We have observed the effect of a saturated nonlinearity on the process of spontaneous soliton formation in a weakly nonlinear medium with absorption. The characteristic properties of the problem are investigated on the basis of a model equation designated as a nonlinear Schrodinger equation with small perturbations describing the saturation of the nonlinearity and the absorption. The stability of the process of decay of the initial pulse is demonstrated by computational methods for a few specific cases. An effect described as an oscillation of the amplitude maximum of the formed pulse has been discovered.V. D. Kuznetsov Siberian Physicotechnical Institute, Tomsk University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 73–76, June, 1995.     

The convergence to zero of Gaussian sequences

Conditions for Gaussian sequences to converge to zero with unit probability are examined. A comparison theorem is proved, on the basis of which sufficient conditions are derived for the convergence to zero of Gaussian sequences, including, in particular, the previously known ones.Translated from Matematicheskie Zametki, Vol. 21, No. 4, pp. 531–538, April, 1977.     

Lower-Threshold Ionization in Laser Channel Propagation

Russian Physics Journal - The paper considers the creation of long ionized channels in atmospheric aerosol based on the combustion and detonation processes. The literature review is performed in...     

Electromagnetic Energy Transfer in the Atmosphere Ionized by Laser Radiation

Russian Physics Journal - The physical processes occurring in the atmosphere, when weak ionization channels are formed by laser radiation, are discussed. An electromagnetic energy transmission...     

Femtosecond Laser Filamentation in Liquid Spray

Russian Physics Journal - The paper presents the femtosecond laser filamentation, which splits the liquid spray into two jets. The dependence is suggested for the acoustic signal and the...     

Fluorescence of a Liquid Drop with a Dye Excited by Femtosecond Laser Pulses

Results of investigations into the spectral and power characteristics of two-photon fluorescence of a liquid drop with the Rhodamine 6G dye irradiated by femtosecond laser pulses are presented. It is demonstrated that stimulated emission of two types is realized in drops with the concentrated dye solution, namely, superfluorescence within the drop volume and lasing on whispering gallery modes.__________Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 15–19, April, 2005.     

Effects of Stimulated Radiation in Liquid Particles and Drops with a Dye

Results of our investigations of stimulated radiation in polydisperse aerosols and drops of dye solutions aimed at developing methods of Raman spectroscopy of aerosols and creating efficient laser sources and frequency converters on the basis of liquid microresonators are given in the present paper.