V. M. Kiselev

Repetitively pulsed iodine laser with passive Q-switch and controlled spectrum radiation

Repetitively pulsed iodine laser with Q-switch and controlled by magnetic field spectrum of radiation is studied. The application of the laser in the location system with an optical preamplifier is analyzed.

Singlet-oxygen generator on base of solid-state fullerene-containing structures for fullerene-oxygen-iodine laser design: physical principles

The singlet oxygen generator development is the basic problem of fullerene oxygen iodine laser design. Physival principles of singlet oxygen generator on the base of solid-state fullerene-containing structures were investigated. The solid-state singlet oxygen generator is a surface of membranous structures with embedded fullerenes (fullerites) of fullerene-like nanostructures - astralenes. Singlet oxygen is generated by interaction of molecular oxygen, sorbed by the surface and fullerene-like nanostructures, photoexcited by optical pump. The singlet oxygen entrance in gas phase occurs as a desorption wave, caused by surface heating by optical pump. The effectiveness of molecular oxygen sorption by fullerene C60 and astralen depending on temperature, the extent of nanostructures heating, oxygen pressure and morphology of coating was studies.

Fullurene-oxygen-iodine laser (FOIL): physical principles

The paper considers the physical principles of developing the fullerene - oxygen - iodine laser (FOIL) with optical (sunlight in particular) pumping. Kinetic scheme of such a laser is considered. It is shown that the utmost efficiency of FOIL may exceed 40% of the energy, absorbed by fullerenes. Presented are the experimental results of singlet oxygen generation in liquid media (solutions and suspensions) and in solid-state structures, containing either fullerenes or fullerene-like nanopartickles (FNP). In experiment was shown the possibility of the singlet oxygen transfer to the gaseous phase by means of organizing of the solution (suspension) the boiling as well as of the gasodynamic wave of desorption from the solid-state structures, containing fullerenes or FNP. We present the preliminary experimental results of pulsed generation in optically pumped FOIL with the use of primary photodissociation of iodide for preparation of the atomic iodine in the generation zone. In the experiments on FOIL generation was implemented the principle of spectral separation of optical pumping.

Fullerene-oxygen-iodine laser (FOIL): physical principles

The paper considers the physical principles of developing the fullerene —oxygen — iodine laser (FOIL) with optical (sunlight in particular) pumping. Kinetic scheme of such a laser is considered. It is shown that the utmost efficiency of FOIL may exceed 40% of the energy, absorbed by fullerenes. Presented are the experimental results of singlet oxygen generation in liquid media (solutions and suspensions) and in solid-state structures, containing either fullerenes or fullerene-like nanopartickles (FNP). In experiment was shown the possibility of the singlet oxygen transfer to the gaseous phase by means of organizing of the solution (suspension) the boiling as well as of the gasodynamic wave of desorption from the solid-state structures, containing fullerenes or FNP. We present the preliminary experimental results of pulsed generation in optically pumped FOIL with the use of primary photodissociation of iodide for preparation of the atomic iodine in the generation zone. In the experiments on FOIL generation was implemented the principle of spectral separation of optical pumping.

Optimization of atmospheric compensation in high-rate coherent adaptive optics systems

Application of high spatial frequency filtration gives the opportunity to increase the efficiency of radiation delivery by coherent adaptive systems and to decrease a number of actual terms in spectral expansion. Modern high-rate technique of wavefront sensing and correction makes it possible to combine the advantages of phase conjugation and multidither modes for middle ranges at horizontal paths.

Enhancement of relaxation oscillations with intracavity absorption cell

Application of an intracavity absorption cell gives the opportunity to increase essentially the output power sensitivity to modulation of losses at the frequency of relaxation oscillations up to theoretically infinite value.

Crystalline passive shutter for iodine lasers

Results of the investigations of the new passive shutter on the base of yttrium-aluminum garnet activated by vanadium ions (V3+) are presented. Wide absorption band (1.2 - 1.4 (mu) ) with maximum on the wavelength 1.34 (mu) corresponds to the electron-vibration transition 3A2 - 3T2 of ions V3+.

Relaxation oscillations and frequency stabilization of a CO2 laser

Approximations for frequency and amplitude of relaxation oscillations are considered both in a common case and for CO2 laser. Different schemes of frequency stabilization system constructions are analyzed for the laser on base of CO2 active medium.