Kinetics of the active medium of a He—Sr<sup>+</sup>recombination laser: 1. Spatiotemporal characteristics

Chebotarev, Gennady D; Latush, E. L.; Prutsakov, Oleg O.; Fesenko, Anastasia A.

doi:10.1070/qe2008v038n04abeh013697

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…We note that lasing on lines of the buffer gas at sufficiently high pressure in the He-Ne-Sr laser can be excited only in the presence of the Sr atoms delivered from the hot walls of the gas-discharge tube (GDT). This conclusion was made by Chebotarev et al [4] who demonstrated that under conditions of discharge excitation close to those of [1][2][3], the presence of the Sr atoms with the concentration ~4·10 14 cm -3 prevents contraction of the pulse-periodic discharge inevitable for sufficiently high pressure in the hot GDT.…”

Section: Introductionmentioning

confidence: 66%

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

2011

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Results of spectroscopic investigations into plasma of a pulse-periodic strontium vapor laser operating in the superradiance mode on the infrared transition at λ = 6.45 μm are presented. The method of determining the electron temperature and concentration as well as the gas temperature -T e , n е , and T g -based on measuring the absolute intensities of some SrI and SrII and buffer gas (helium or neon) spectral lines is used. Time dependences of the line intensities during a current pulse (τ = 150 ns) and near afterglow (up to 3 μs) are obtained under conditions of non-equilibrium plasma ionization and recombination. The optical system collects radiation from the entire length of the plasma column by means of separating radial volume zones, including the central zone and the zone closer to the walls, with the monochromator slit. The results obtained allow us not only to calculate T e , n е , and T g values, but also to trace the spatiotemporal plasma evolution.

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Section: Introductionmentioning

confidence: 66%

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

2011

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“…But their use is difficult because of the high price and service costs, which is not acceptable for regular medical practice. A new alternative to the free electron lasers are strontium vapour lasers (atom and ion transfers) with generation at several wavelengths in the infrared spectrum: 2.06, 2.20, 2.69, 2.92, 3.01, 3.07, and 6.45 m µ [6,7]. These lasers have acceptable price, compact size, easy operation, and lower service costs than the free electron lasers.…”

Section: Description Of Strontium Bromide Laser and Experimental Datamentioning

confidence: 99%

Prediction of strontium bromide laser efficiency using cluster and decision tree analysis

Iliev

Gocheva-Ilieva

Kulin

2018

EPJ Web of Conferences

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Abstract. Subject of investigation is a new high-powered strontium bromide (SrBr 2 ) vapor laser emitting in multiline region of wavelengths. The laser is an alternative to the atom strontium lasers and electron free lasers, especially at the line 6.45 m µ which line is used in surgery for medical processing of biological tissues and bones with minimal damage. In this paper the experimental data from measurements of operational and output characteristics of the laser are statistically processed by means of cluster analysis and tree-based regression techniques. The aim is to extract the more important relationships and dependences from the available data which influence the increase of the overall laser efficiency. There are constructed and analyzed a set of cluster models. It is shown by using different cluster methods that the seven investigated operational characteristics (laser tube diameter, length, supplied electrical power, and others) and laser efficiency are combined in 2 clusters. By the built regression tree models using Classification and Regression Trees (CART) technique there are obtained dependences to predict the values of efficiency, and especially the maximum efficiency with over 95% accuracy.

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“…The first 3 rows, numbered V1, V2, and V3 show the examples of real experiment data and the corresponding predictions with the help of equation (2). The following 7 rows numbered 1-7 present predictions for new variants of cases of laser sources, obtained by the procedure, described in the beginning of this section.…”

Section: Predicting Laser Output Powermentioning

confidence: 99%

“…Column 9 shows three actual measured power outputs. Column 10 presents the calculated values for given cases obtained using modelling equations of type (2). Column 11 presents the relative error for the predicted laser output power with respect to the experiment.…”

Section: Predicting Laser Output Powermentioning

confidence: 99%

Multivariate Statistical Analysis in Planning Experiments for a New Strontium Bromide Vapour Laser

Iliev¹,

Gocheva-Ilieva²,

Temelkov³

et al. 2012

IJOE

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The subject of investigation is a SrBr 2 laser generating at a wavelength λ = 6.45 µm. This type of laser generation is finding ever wider application in medicine when working with soft and bone tissue providing rapid subsequent recovery. Of all laser sources generating at this wavelength, the new SrBr 2 laser is gaining ever more ground due to its advantages and is therefore of commercial interest. With the goal of developing new, higher-powered SrBr 2 lasers, in this paper, the so-called phenomenological modeling has been used for the first time for this type of laser. An estimation of the degree of influence of 7 independent input laser quantities on laser output power has been performed using factor and regression analysis. A methodology has been developed with the help of which a series of new SrBr 2 lasers with higher output power than existing ones has been predicted. Problems related to the planning of the experiment have been partially solved -carrying out of filtering and extremal experiment.

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Kinetics of the active medium of a He—Sr⁺recombination laser: 1. Spatiotemporal characteristics

Cited by 7 publications

References 16 publications

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

Prediction of strontium bromide laser efficiency using cluster and decision tree analysis

Multivariate Statistical Analysis in Planning Experiments for a New Strontium Bromide Vapour Laser

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Kinetics of the active medium of a He—Sr+recombination laser: 1. Spatiotemporal characteristics

Cited by 7 publications

References 16 publications

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

Spatiotemporal spectroscopic diagnostics of a pulse-periodic strontium vapor laser

Prediction of strontium bromide laser efficiency using cluster and decision tree analysis

Multivariate Statistical Analysis in Planning Experiments for a New Strontium Bromide Vapour Laser

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Product

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Kinetics of the active medium of a He—Sr⁺recombination laser: 1. Spatiotemporal characteristics