Transfer and Trapping of Resonance Radiation in a Two-Level System

Optics and Spectroscopy - The population kinetics of a two-level system has been theoretically investigated taking into account the transfer of spontaneous radiation under continuous optical...     

Damage of Dusty Optical Elements in the Field of Continuous-Wave Laser Radiation

The structure and properties of high-pressure phases of iron nitrides Fe₇N₃ in the pressure range of 50–150 GPa have been studied with ab initio calculations within the electron density functional theory. A new phase Amm2-Fe₇N₃, which is the most energetically favorable in the pressure range of 43–128 GPa, has been found using the USPEX (Universal Structure Predictor: Evolutionary Xtallography) algorithms. It has been thermodynamically shown that another high-pressure phase β-Fe₇N₃ is isostructural to a similar phase of iron carbide. The elastic properties have been calculated for all modifications ε-, β-, and Amm2-Fe₇N₃ stable at high pressures.     

Focal spot analysis of optical inhomogeneities appearing in the working medium of an iodine photodissociation laser with flashlamp pumping

We report on the results of experimental studies of optical inhomogeneities appearing in the working medium of an iodine photodissociation laser operating in the inversion accumulation mode and in the free-running mode. The dynamics of evolution of optical inhomogeneities in the free-running mode is studied experimentally.     

Photodetector array for intracavity selection of laser radiation direction

A photodissociation iodine laser with an intracavity spatio-temporal light modulator controlled by an external photodetector array is studied experimentally. The feasibility of lasing in different directions determined by a light signal is demonstrated. The laser radiation energy is 11 J per pulse, and the duration and divergence of the pulse are 180 μs and 1.2 × 10⁻⁴ rad, respectively.