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Egorov M.S.,Scientific Research Institute of Optoelectronic Instrumentation | Rezunkov Yu.A.,Scientific Research Institute of Optoelectronic Instrumentation | Nosatenko P.Ya.,Kometa Corporation
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2014

The design principles of a reactive-thrust laser system for minispacecraft are proposed for the first time. Based on these principles, an optical system has been developed for a laser-engine installation, using special optical systems such as optical turrets and optical hinges. A scenario is considered of an orbital maneuver of a minispacecraft with laser reactive thrust for removing objects of space debris from geostationary orbit. It is shown that a laser source with a power of 1 kW is required to remove an object of mass 200 kg from this orbit onto a special space tug. The minispacecraft can be also used for monitoring near-earth space, surveying large space stations, etc. © 2014 Optical Society of America. Source


Makin V.S.,Scientific Research Institute of Optoelectronic Instrumentation | Pestov Yu.I.,Scientific Research Institute of Optoelectronic Instrumentation | Privalov V.E.,Saint Petersburg State Polytechnic University
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2013

When multipulse laser-induced recrystallization of a titanium surface occurs under the action of polarized radiation, grain growth is detected, associated with the polarization direction of the radiation. An explanation of the observed phenomenon is given, based on the effect of electron entrainment by surface plasmon-polaritons excited at the grain boundaries. © 2013 Optical Society of America. Source


Osipov V.M.,Scientific Research Institute of Optoelectronic Instrumentation | Borisova N.F.,Scientific Research Institute of Optoelectronic Instrumentation
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2014

This paper presents an analysis of the contribution of various IR-attenuation mechanisms when the transmittance of oblique atmospheric tracks is being determined. It is shown that, under the conditions of an arid zone, the existing models of aerosol attenuation substantially underestimate its value in the long-wavelength section. Algorithms are developed for rapidly computing the transmittance and the intrinsic thermal radiation of the atmosphere on an oblique track, taking into account the specific meteorological conditions. Agreement with the experimental data is achieved when multimode models of the aerosol distribution in the near-earth layer are used. The transmission-calculation error has been estimated. A comparison of the calculated transmission and emission with the results obtained by means of known calculational methods is presented. A developed software complex is used in creating apparatus for monitoring the optical characteristics of oblique tracks. © 2014 Optical Society of America. Source


Pavlov N.I.,Scientific Research Institute of Optoelectronic Instrumentation | Prilipko A.Y.,Scientific Research Institute of Optoelectronic Instrumentation
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2013

This paper discusses a method of viewing a circular spatial zone by using a scanning thermal direction finder, based on a photodetector array with a high frame frequency and an ITR readout regime. A number of analytical relationships useful for the design of a scanning thermal direction finder are obtained, including the connection of the signal-accumulation time with the frame frequency, the angular frame size in the azimuthal scanning direction, and the radius of the circle of confusion of the detector objective. The proposed method provides high angular resolution, a signal-accumulation time to 2 ms, and increased sensitivity of the apparatus. The maximum information-renewal frequency, determined by the azimuthal-scanning frequency, reaches several hertz. The best conditions for using the proposed method are ensured when one works in the mid-IR region. © 2013 Optical Society of America. Source


Alekseev V.N.,Scientific Research Institute of Optoelectronic Instrumentation | Liber V.I.,Scientific Research Institute of Optoelectronic Instrumentation | Volkov A.S.,OOO Integrated Technologies
Journal of Optical Technology (A Translation of Opticheskii Zhurnal) | Year: 2014

This paper proposes the layout of a cavity with planoconvex mirrors for reducing the angular divergence of radiation due to the formation of a large diameter of the zeroth transverse mode. It is shown that installing the active element close to a flat mirror makes it possible to significantly reduce the length of the laser cavity by more rapidly reducing the Fresnel number for the focused beam. A discussion is presented of the optical layout and the results of a study of the characteristics of a laser system that combines a master oscillator and a two-pass, two-stage amplifier. At a relatively low pulse-repetition rate (100 Hz), about 30% of the pulse energy is lost at the output polarizer of the laser. The pulse-energy losses are eliminated by establishing a ninety-degree rotation of the polarization of the radiation between the amplifier stages. © 2014 Optical Society of America. Source

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