Analogy between mechanics and optics

Division of Theoretical Physics, Lebedev Physics Institute. Translated from Preprint 114, Lebedev Physics Institute, Moscow, 1990.     

Correlated states of a quantum oscillator and of a quantum chain of oscillators with a δ bump in frequency

Quantum Radiophysics Division, Lebedev Physics Institute. Translated from Preprint No. 139 of the Lebedev Physics Institute, Russian Academy of Sciences, Moscow, 1991.     

USE of negative feedback to suppress injection-laser power fluctuation

P. N. Lebedev Physics Institute. Translated from Preprint No. 215 of the Lebedev Institute of Physics, Academy of Sciences of the USSR, Moscow, 1989.     

Theoretical and numerical analysis of stresses in a laser hardening model

Kuibyshev Branch of the Lebedev Physics Institute. Translated from Preprint No. 167 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1990.     

Coupling an injection laser to a single-mode optical fiberguide with the aid of a microlens in a matching-module system

Optoelectronics Laboratory, Lebedev Physics Institute. Translated from Preprint No. 192 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Analysis of low-frequency fluctuation of the radiation power of injection lasers

Quantum Radiophysics Division, Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Preprint No. 106 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Squeezed states of electromagnetic field

Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow. Translated from Preprint No. 232 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

Methods of estimating the angular and energy characteristics of generated laser emission

The physical models used to estimate the angular and energy characteristics of laser emission generated in the kinetic and coherent regime of emission interaction with an active medium are critically analyzed and systematized.Quantum Radiophysics and Optics Division, Lebedev Physics Institute. Translated from Preprint No. 176 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Spatiotemporal characteristics of laser emission. III. Propagation of electromagnetic radiation beam in laser installations with allowance for large-angle diffraction and spatial self-focusing

In parts 1 and 2, the electrodynamic theory developed for the laser as a nonstationary nonlinear oscillating system with spatially distributed parameters was applied to specific laser types. The subject of part 3 is designated in the title.Division of Quantum Radiophysics, Lebedev Physics Institute. Translated from Preprint No. 86 of the Lebedev Physics Institute, Moscow, 1990.     

Selective laser spectroscopy of molecules in matrices. Experiments with porphyrins

A review is presented of experiments on selective laser excitation of luminescence and hole burning in the absorption spectra of porphyrins in amorphous matrices at liquid helium temperatures.Division of Quantum Radiophysics, Lebedev Physics Institute, Academy ofSciences of the USSR, Moscow. Translated from Preprint No. 165 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

Stability and bistability of stationary states in four-wave interaction in a photorefractive medium

The stability of stationary states is investigated analytically and numerically for various four-wave mixing schemes in a photorefractive medium with nonlocal nonlinear response when recorded with a translucent grating. Bistability is indicated for a number of four-wave-mixing schemes and the conditions for its existence are indicated.Quantum-Radiophysics Division, Plasma-Phenomena-Theory Sector, Lebedev Physics Institute. Translated from Preprint No. 138 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Amplification in a semibounded free-electron laser

A self-consistent analytic expression for the complex gain of a free-electron laser is obtained on the basis of the single-particle equations with realistic boundary conditions. The results are presented in the form of amplitude-frequency and phase-frequency characteristics of a free-electron laser.New-Accelerator Problems Laboratory, Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Preprint No. 240 of the Lebedev Physics Institute, Academy of Sciences of the USSR, 1988.     

Impurity micropotentials in commercial silicon crystals

The use of very cold neutrons, of laser mass spectrometry, and of secondary-ion mass spectrometry has revealed the presence of microprecipitates in commercial Si crystals grown by the Czochralski method and by float zoning.Neutron-Physics Laboratory, Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Preprint No. 149 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

Coherent effects in two-level amplifying and SRS-active media

Some results are reported on coherent propagation of optical pulses. In particular, a solution is presented of the Maxwell-Bloch equations for the case of amplification of high-power pulses with varying carrier frequency but with constant number of photons in the pulse.Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow. Translated from Preprint No. 211 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

Coherent interaction of an electromagnetic field with a medium of two-level particles and with a superconducting current in a Josephson structure

The propagation of electromagnetic pulses in Josephson structures is investigated theoretically. An analogy with interaction of light pulses with a twolevel medium is traced. Under certain conditions the propagation of electromagnetic radiation in a two-level medium and in a Josephson structure is described by the same wave equation.Lebedev Physics Institute, Academy of Sciences of the USSR, Moscwow. Translated from Preprint No. 233 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1938.     

Contribution to the theory of optical constants in the vacuum ultraviolet and soft x-ray bands

A consistent exposition is presented of the theory of the dynamic response of an atom in the Thomas—Fermi model. The approach proposed is based on a system of Vlasov equations with a self-consistent field. These equations, supplemented by appropriate boundary conditions, describe the dynamic polarizability and photoabsorption of complex many-electron atoms.Theoretical Radiophysics Sector, Lebedev Physics Institute. Translated from Preprint No. 139 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1989.     

Holographic registration of a one-dimensional optical signal using a nonstationary reference wave,and its analysis

We consider a method of holographic registration of laser emission modulated by interaction with an object or a medium whose optical properties vary with time and along one of the coordinates. A reference wave whose frequency varies linearly along a coordinate and with time in the registration plane is used. The method makes feasible the implementation of two-exposure holographic interferometry. Information on the temporal, spectral, and phase characteristics as functions of the coordinate can be obtained during the reconstruction stage.Physics and Spectroscopy Division, Lebedev Physics Institute. Translated from Preprint 131, Lebedev Physics Institute of the USSR Academy of Sciences, Moscow, 1989.     

Generalized coherent states of multimode light,and biphotons

Generalized coherent states of a multimode field are analyzed within the framework of the dynamic-symmetry approach and with allowance for polarization. A new class of unpolarized two-photon states is defined. The uncertainty relations and statistical and other properties of optical fields in these states are calculated and analyzed. The relations between the considered states and squeezed states of light are discussed.Optics Laboratory, Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Preprint No. 254 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow. 1988.     

Phase problem in optics

The problem of reconstructing a coherent monochromatic field from its energy characteristics is considered. A comparative analysis is made of one- and two-dimensional phase problems. It is shown that a substantial role is played in the two-dimensional case by the vortical properties of the optical-energy flux vector. The results of computer and physical experiments are reported.Optics and Spectroscopy Division, Lebedev Physics Institute. Translated from Preprint No. 93 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1990.     

Pulse-periodic-pumped small CO lasers

Optics Division, Lebedev Institute. Translated from Preprint No. 61, Physics Institute, Russian Academy of Sciences, Moscow, 1991.