scholarly journals Характеристики апконверсионной люминесценции порошков CaF-=SUB=-2-=/SUB=- : Er при возбуждении лазерным излучением с длиной волны 1.5 μm

2020 ◽  
Vol 128 (2) ◽  
pp. 204
Author(s):  
А.А. Ляпин ◽  
П.А. Рябочкина ◽  
С.В. Гущин ◽  
М.Н. Жарков ◽  
А.С. Ермаков ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Upconversion Luminescence ◽  
Energy Yield ◽  
Yield Values ◽  
Spectral Ranges

The characteristics of upconversion luminescence of CaF2:Er crystalline powders were investigated upon excitation of Er3+ ions to the 4I13/2 level by laser radiation at 1531.8 nm. The energy yield values of upconversion luminescence were determined for the spectral ranges 380–780 and 380–1100 nm. It was found that upconversion luminescence of CaF2:Er powders with concentrations of 0.5, 2, 4, 6, 8, 10, 11, 13, 15, and 17% of Er3+ ions is characterized by correlated color temperatures of about 5100, 2142, 1726, 1738, 1773, 1757, 1762, 1765, 1735, and 1714 K, respectively.

ACTUAL PROBLEMS OF LASER HYGIENE

2021 ◽  
Author(s):  
Yu.P. Paltsev ◽  
◽  
L.V. Pokhodzey
Keyword(s):  
Laser Radiation ◽  
Russian Federation ◽  
Effective Means ◽  
The European Union ◽  
Laser Safety ◽  
The Usa ◽  
Order Of Magnitude ◽  
The Russian Federation ◽  
Spectral Ranges

Annotation. The widespread introduction of laser products in various fields of science, technology and medicine, as well as the possibility of serious damage to the organ of vision and skin during their operation, put forward new and increasingly complex tasks for laser hygiene. An analysis of the hygienic normative and methodological documents currently in force on the territory of the Russian Federation showed that they cannot fully ensure laser safety. Differences in the approaches to the hygienic standardization of laser radiation (LR), adopted in the Russian Federation and the USA and the European Union, have been established. The LR hygienic standards in GOST R IEC 60825-1-2013 are practically identical to foreign IEC 60825 standards, that is, in most spectral ranges they exceed the MPL by an order of magnitude or more (SanPiN 1.2.3685-21). The necessity of correcting the hygienic standards of LR, harmonizing the classification of lasers according to the degree of hazard, and developing effective means of control and protection was revealed. Draft documents have been developed: "Hygienic standards for laser radiation" and "Sanitary and epidemiological requirements for working conditions during the operation of laser products", the introduction of which into the practice of sanitary and epidemiological supervision will ensure the preservation of the health of workers. Key words: lasers, correction of hygienic standards, classification, methods and means of control and protection, laser safety.

scholarly journals Ап-конверсия инфракрасного излучения в щелочно-земельных фторидах, активированных Er-=SUP=-3+-=/SUP=-

2020 ◽  
Vol 128 (11) ◽  
pp. 1621
Author(s):  
Е.А. Раджабов ◽  
Р.Ю. Шендрик
Keyword(s):  
Luminescence Spectrum ◽  
Upconversion Luminescence ◽  
Laser Diodes ◽  
Energy Yield

Upconversion processes were studied in MeF2-ErF3 crystals (Me - Ca, Sr, Ba) in the range of ErF3 concentrations from 0.01 to 10 mol% when excited in infrared bands of the Er3 + ion by laser diodes of 808, 978, 1542 nm. Upon excitation of 1542 nm, the 4I11/2-4I15/2 band at 990 nm predominates in the luminescence spectrum of MeF2-Er; the fraction of visible bands is less than 0.1. The energy yield of the upconversion luminescence MeF2-10% ErF3 upon excitation of 1542 nm with a density of about 1 W/cm2 is in the range of 14-26%.

Characteristics of Upconversion Luminescence of CaF2:Er Powders Excited by 1.5-µm Laser Radiation

2020 ◽  
Vol 128 (2) ◽  
pp. 200-206
Author(s):  
A. A. Lyapin ◽  
P. A. Ryabochkina ◽  
S. V. Gushchin ◽  
M. N. Zharkov ◽  
A. S. Ermakov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Upconversion Luminescence

PHASE CONJUGATION OF KrF LASER RADIATION

1983 ◽  
Vol 44 (C2) ◽  
pp. C2-19-C2-25
Author(s):  
M. C. Gower ◽  
R. G. Caro
Keyword(s):  
Laser Radiation ◽  
Phase Conjugation ◽  
Krf Laser

HEATING OF CRYSTALLINE AND AMORPHOUS SILICON BY C-SWITCHED LASER RADIATION

1980 ◽  
Vol 41 (C4) ◽  
pp. C4-31-C4-36
Author(s):  
J. R. Meyer ◽  
F. J. Bartoli ◽  
M. R. Kruer
Keyword(s):  
Laser Radiation ◽  
Amorphous Silicon
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