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.     

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.     

Review of methods of calculating the field in optical cavities and choice of calculation method for free-flow chemical lasers

Optics Division, Lebedev Physics Institute. Translated from Preprint No. 127 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.     

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.     

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.     

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.     

Similarity of light fluxes diffracted in the far field by apertures of complicated shape

Translation of Preprint No. 189, Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1990.     

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.     

System for nanosecond and picosecond laser synchronization using high-voltage semiconductor switches

Results are presented on the development and investigation of a system for the synchronization of the emission of a nanosecond laser, used for plasma heating, with the emission of a diagnostic picosecond laser. The system is based on the use of the fast-semiconductor-switch technology, and ensures a temporal synchronization instability not higher than 100 psec.Laser-Plansma Laboratory and Special Design Office. Lebedev Physics Institutes, Academy of Sciences of the USSR. Translated from Preprint No. 85 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1988.     

Kinetics of formation of the CO2 molecule distributions over the vibrational-rotational levels in the active medium of a waveguide CO2 laser

Translated from Preprint No. 218 of the Lebedev Institute of Physics, Academy of Sciences of the USSR, Moscow, 1989.     

Physical and chemical processes in the electroionization discharge plasma

Published in English as Preprint No. 254 of the Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow, 1987.     

Generation of ultrashort pulses in solid media with a large gain coefficient

Lebedev Physics Institute, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 32, No. 3, pp. 369–379, March, 1989.     

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.     

Dynamical regimes in a laser with two resonant lines of the active medium

P. N. Lebedev Physical Institute, Academy of Sciences of the USSR. Scientific-Research Institute of Mechanics and Physics of Saratov University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 3, pp. 300–311, March, 1988.