Vyatcheslav T. Karpukhin

Studies of Cu vapor laser UV sum frequency generation in DKDP

The results of investigation of UV ((lambda) equals 271 nm) Cu vapor laser sum frequency ((lambda) 1 equals 510 nm, (lambda) 2 equals 578 nm) generation in crystal DKDP are presented. For interaction type ooe the mean UV power about 0.2 W and conversion efficiency (eta) is congruent to 2.5 divided by 3% are obtained for laser mean power about 7 W. Beam divergence, yellow and green line pulse amplitudes, and relative delay are of key importance for sum frequency generation. Optimization of standard 20 W mean power Cu vapor laser was necessary for efficient frequency conversion. The possibility of creating 5 divided by 10 W source of UV radiation is shown, using Cu vapor laser sum frequency generation in DKDP.

Cu vapor laser UV frequency conversion in DKDP

The results on investigation of UV ((lambda) equals 271 nm) Cu vapor laser sum frequency ((lambda) 1 equals 510 nm, (lambda) 2 equals 578 nm) generation in crystal DKDP are presented. For interaction type ooe the mean UV power about 0.2 W and conversion efficiency (eta) approximately equals 2.5 + 3% are obtained for laser mean power about 7 W. Beam divergence, yellow and green line pulse amplitudes and relative delay are of key importance for sum frequency generation. Optimization of standard 20 W mean power Cu vapor laser was necessary for efficiency frequency conversion. The possibility is shown to create 5 divided by 10 W source of UV radiation, using Cu vapor laser sum frequency generation in DKDP.

Features of Copper Vapor Laser Emission Excited by Pulse-Periodic HF Discharge

The results of numerical studies of pulsed radiation of the induction copper vapor laser are presented. The laser is excited by trains of high-frequency (10–70 MHz) electric current oscillations. Trains follow one after another with a frequency in 2–17 kHz. The features and variety of obtained laser radiation pulse shapes and their applicability to diagnostic purposes and other practical problems are discussed.

Morphology of Tungsten Nanooxides, Synthesized by Laser Ablation of Metal in Water

Colloidal solution precipitates obtained during laser ablation of tungsten in water and containing nanostructured metal oxides are studied using X-ray diffraction and scanning electron microscopy. The nanostructure composition and morphology are analyzed. It is shown that the material composing nanostructures is X-ray amorphous, i.e., the particle size does not exceed 1–2 nm. The high degree of the structure surface development implies prospects of their use as substrata when analyzing the composition of various materials by surface-enhanced Raman scattering.

Possibility of remote sensing of surface roughness with a projector microscope based on a copper vapor optical quantum generator

Rough surfaces were illuminated by yellow (?=O.5782 ?m) and green (?=O.5106 ?m) light of a copper vapor optical quantum generator, and the light scattered from the surfaces passed through a projector microscope. The microscope included a laser tube of the quantum generator and a Glan prism placed inside an unstable resonator of the quantum generator. Slightly and very rough steel surfaces with small rms slopes of roughness were studied. The original ratio between intensities of the illuminating yellow and green light was transformed by both the rough surface and the projector microscope. Rough surfaces amplified the ratio of intensities of the scattered yellow to green light and the amplification factor depended on the statistics of rough surfaces. The ratio of intensities of the yellow to green light at the output of the projector microscope increased with increasing intensity at the input of the microscope. For the relative intensity greater than 0.4, the projector microscope amplified this ratio and the ratio was attenuated by the microscope for smaller relative intensity. Two methods for measuring surface roughness are proposed.

High-power-range mobile railway CO2 GDL facility for civil engineering

Design of autonomous mobile high power CO2 gas dynamic laser (GDL) using regenerative heat exchangers for heating of laser mixtures optimized in composition was presented. A mobile laser is designed specially to be mounted in standard railway platforms. Various applications of mobile lasers in civil engineering were discussed. Economical aspects of exploitation of mobile CO2 GDL were analyzed.

Three-year experience of an industrial facility using gas dynamic CO2 laser at Cherepovetz Metallurgy Works SeverStahl

The paper present the result of long-term investigations of experimental industrial laser complex designed to study the possibilities of applications of high power gas dynamic CO2 laser in metallurgical technologies for repair and restoration of large scale equipment. Technical and economical aspects of industrial application of such laser systems are discussed.

High-power CO2 gas-dynamic lasers for applications in technology

The performance of high power gas dynamic laser facilities is described. The key features of design of these installations and their applications in technology are discussed. Results of gas dynamic laser test runs are provided. The GDL using heat exchangers for laser gas heating, transportable by automobile and rail road platforms, are described.

Heat treatment of large-scale rolling machine rolls by high-power gas dynamic laser at Cherepovetz Metallurgy Works

The results are presented of measurements of surface hardness and wear resistivity of rolling machine 2000 rolls which were under heat treatment by high power gas dynamic laser at Cherepovetz Metallurgy Work. Surface hardness of rolls increased from 70 HSh to 80 - 85 HSh. Wear resistivity also showed considerable increase as compared with untreated rolls.

Mobile high-power gas-dynamic CO2 laser installation for technological applications

The design of mobile high power gas dynamic CO2 laser complex for technological applications in the field conditions is presented.