Works in the NSC KIPT on the creation and application of the CPA laser system
A CPA laser system with an output power of 10¹⁰ W is presented, which at the final stage will be brought to a
 power close to 10 TW. The areas of its application are described, the results of the supercontinuum investigation on
 photonic crystal fibers and other samples are presented...
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| Published in: | Вопросы атомной науки и техники |
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| Date: | 2018 |
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| Language: | English |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2018
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| Cite this: | Works in the NSC KIPT on the creation and application of the CPA laser system / A.V. Vasiliev, A.N. Dovbnya, A.M. Yegorov, V.P. Zaitsev, V.P. Leshchenko, I.N. Onischenko, A.I. Povrozin, G.V. Sotnikov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 289-292. — Бібліогр.: 8 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860173758450368512 |
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| author | Vasiliev, A.V. Dovbnya, A.N. Yegorov, A.M. Zaitsev, V.P. Leshchenko, V.P. Onischenko, I.N. Povrozin, A.I. Sotnikov, G.V. |
| author_facet | Vasiliev, A.V. Dovbnya, A.N. Yegorov, A.M. Zaitsev, V.P. Leshchenko, V.P. Onischenko, I.N. Povrozin, A.I. Sotnikov, G.V. |
| citation_txt | Works in the NSC KIPT on the creation and application of the CPA laser system / A.V. Vasiliev, A.N. Dovbnya, A.M. Yegorov, V.P. Zaitsev, V.P. Leshchenko, I.N. Onischenko, A.I. Povrozin, G.V. Sotnikov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 289-292. — Бібліогр.: 8 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | A CPA laser system with an output power of 10¹⁰ W is presented, which at the final stage will be brought to a
power close to 10 TW. The areas of its application are described, the results of the supercontinuum investigation on
photonic crystal fibers and other samples are presented. A technique and device for manufacturing biconical fibers
for the purpose of obtaining a supercontinuum on them has been developed. Different schemes of accelerators, including those on chips and surface electromagnetic waves, have been proposed.
Представлена СРА-лазерна система з вихідною потужністю 10¹⁰ Вт, яка на завершальному етапі буде доведена до
потужності, близької до 10 ТВт. Описано області її застосування, представлені результати дослідження суперконтинуума на фотонно-кристалічних волокнах і на інших зразках. Розроблено методику та пристрій для виготовлення біконічних волокон з метою отримання на них суперконтинуума. Запропоновано різні варіанти можливого застосування СРА-лазерних систем для дослідження схем перспективних прискорювачів, в тому числі на чіпах і на поверхневих електромагнітних хвилях.
Представлена СРА-лазерная система с выходной мощностью 10¹⁰ Вт, которая на завершающем этапе будет доведена
до мощности, близкой к 10 ТВт. Описаны области ее применения, представлены результаты исследования
суперконтинуума на фотонно-кристаллических волокнах и на других образцах. Разработана методика и устройство для
изготовления биконических волокон с целью получения на них суперконтинуума. Предложены различные варианты
возможного применения СРА-лазерных систем для исследования схем перспективных ускорителей, в том числе на чипах
и на поверхностных электромагнитных волнах.
|
| first_indexed | 2025-12-07T17:59:37Z |
| format | Article |
| fulltext |
ISSN 1562-6016. ВАНТ. 2018. №4(116) 289
WORKS IN THE NSC KIPT ON THE CREATION
AND APPLICATION OF THE CPA LASER SYSTEM
A.V. Vasiliev, A.N. Dovbnya, A.M. Yegorov, V.P. Zaitsev, V.P. Leshchenko, I.N. Onischenko,
A.I. Povrozin, G.V. Sotnikov
National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine
E-mail:pai40@kipt.kharkov.ua
A CPA laser system with an output power of 1010 W is presented, which at the final stage will be brought to a
power close to 10 TW. The areas of its application are described, the results of the supercontinuum investigation on
photonic crystal fibers and other samples are presented. A technique and device for manufacturing biconical fibers
for the purpose of obtaining a supercontinuum on them has been developed. Different schemes of accelerators, in-
cluding those on chips and surface electromagnetic waves, have been proposed.
PACS: 41.75.Jv
Approximately, since 2000, high-power femtosec-
ond laser systems that exceed the TW level have re-
ceived the widest distribution in solving both research
and applied problems. These laser systems have already
been given a well-known name − CPA (ie the abbrevia-
tion "chirp pulse amplification") of laser systems in ac-
cordance with the CPA method, which underlies their
creation.
There is no point in enumerating all fields of sci-
ence, including the fundamental, and techniques in
which laser-based systems are used [1]. It will be advis-
able to point out the unique features that determine this
diversity. Let's note two principal aspects. First, these
are primarily applications associated with the use of Fs
pulses in the study of superfast processes, for which
they are practically a delta function. It is also important
to note the possibility of obtaining a relative frequency
stability, up to 10-18, which is closely related to this fea-
ture of the laser, for the generation of a supercontinuum
of longitudinal oscillation types [2]. And second, the
applications associated with the use of ultrahigh-
intensity pulses, for example, in areas close to our NSC,
such as particle acceleration for basic research, research
in the field of thermonuclear fusion and plasma genera-
tion, generation of x-rays and attosecond pulses, etc.
In the NSC KIPT an intermediate laser stage with an
output power of 1010 W in pulse was created at the in-
termediate stage of the work. It operates at a wavelength
of 0.8 μm and generates 30 fs pulses.
In order to understand the merits and features of a
laser installation − very briefly − the principle of its
operation. Fig. 1 shows the functional scheme of the
CPA laser system. As you can see, it consists of four
main blocks. The Masteroscillator is a 30 fs Ti-Sa laser.
Fig. 1. Functional scheme of CPA laser system
Further, these 30 fs impulses are not simply ampli-
fied, as in the traditional schemes, but are expanded in
the Stratcher. Then, the extended pulses are amplified in
the two amplification amplifier amplifiers stages: in the
weak optical amplifier (Amp. 1) and the power amplifi-
er (Amp. 2). And in the Compressor, their compression
occurs. So, the output pulse of 3 W from 105 W in-
creased 107 times to 1012 W at the compressor output.
Fig. 2 shows a general view of the CPA laser instal-
lation and further in Fig. 3 its fragment − the master
oscillator [3]. Here is a plant with dimensions of
300×130×40 cm.
Fig. 2. A general view of the CPA laser installation
At the final stage, we are planning to create a com-
pact version of a CPA laser system with dimensions of
140×60×60 cm and a pulse duration of less than 20 fs,
and the pulse power will be brought to a level close to
10 TW.
Fig. 3. The setting generator CPA laser installation
Next we will touch on the application of CPA laser
systems within the NSC KIPT. These applications fol-
low from the structure of the construction of the CPA
system:
ISSN 1562-6016. ВАНТ. 2018. №4(116) 290
- applications related to the use of the CPA master
generator of a laser system generating pulses of less
than 20 fs;
- applications related to the use of anCPA laser sys-
tem with an output power level of 1010 W to about
1 TW;
- applications related to the use of CPA laser system
with a level of output power from several TW and
above.
For practical implementation of the master oscilla-
tor, we carried out a sufficiently large volume of re-
search aimed at improving the quality of its output char-
acteristics, such as: pulse duration and emission spec-
trum, relative frequency stability. In the laser system
originally designed by the CPA, the pulse duration was
30 fs. Fig. 4 shows the autocorrelation functions ob-
tained by the correlator we have created, with the help
of which, according to the formula τp = Nλ / 1.55 c,
where N is the number of interference bands at the half
level; λ is the wavelength of the radiation; 1.55 − coeffi-
cient for the shape of the pulse sech2; c − is the speed of
light, durations of 30 fs and 17 fs of pulses were deter-
mined. Fig. 5 shows their spectra measured by the SP-1
spectrometer from Thorlabs.
Fig. 4. Correlation functions of 30 fs Ti-Sa laser (left)
and 17 fs Ti-Sa laser (right)
Fig. 5. 1 − emission spectrum of 30 fs Ti-Sa laser,
spectral width 22.6 nm; 2 − radiation spectrum
of 17 fs Ti-Sa laser, spectral width 58.4 nm
Calculations show that in this case for the shape of
the pulse sech2 the width of the emission spectrum
should correspond to a value of approximately 45 nm.
Consequently, the spectrum shown in Fig. 5, having a
width of 58.4 nm, indicates that the pulse at the output
of the Ti-Sa laser undergoes dispersion expansion when
a glass substrate of the output mirror of the M1 laser
passes through a 6 mm (see Fig. 1). In accordance with
formula (1) for the theoretical limit, the pulse duration τ
and sech2 type should be equal to about 12 fs:
τp = 0.315 λ2/c Δλ,
where λ is the wavelength of the laser radiation, Δλ is
the width of the laser emission spectrum, and c is the
speed of light.
Pulses with a duration of 12 fs of the output of the
master oscillator can be obtained with a prism external
compressor.
In the conditions of our laboratory, taking measures on
passive frequency stabilization made it possible to obtain a
relative stability of 100 Hz/80 THz = 1.25×10-12 Hz.
Which is an order of magnitude greater than the stability
that metrologists sought at the dawn of laser technology.
To expand the scope of the master oscillator, a num-
ber of experiments were carried out using nonlinear
fibers. This made it possible to obtain ultra-wide output
spectra. The experiments were carried out on two types of
photonic crystal fibers (PCF): Thorlabs for λ = 1060 nm,
fiber length 60 cm and Newport for λ = 800 nm, fiber
length 20 cm.
In Fig. 7 shows the results of measurements of the
emission spectra at the output of photonic crystal fibers
for λ = 1060 nm, 60 cm and for λ = 800 nm, 20 cm, de-
pending on the wavelength and power of the laser pump
radiation.
a) The output spectrum
of the Ti-Sa laser
b) The spectrum at the fiber
output for λ = 1040 nm
c) = 800 nm,
P = 275 mW
d) = 800 nm,
P = 530 mW
Fig. 6. Measured emission spectra at the output
of photonic crystal fibers
From Fig. 6, the spectrum at the output of the fiber is
shown to be up to 500 nm, which indicates the promise
of using PCF for expanding the emission spectrum of
the master oscillator.
However, obtaining the same wide spectra is possi-
ble with the help of biconical fibers [4], which have the
advantage over PCF, namely − small dimensions of the
equipment, easy manufacturing, no critical focus, no
rigid requirements for the adjusted devices.
The attractiveness of this method predetermined its
practical application in the conditions of the NSC KIPT.
The diameter of the waist for a biconical fiber for a
wavelength of 800 nm should not exceed 2.5 μm. Bi-
conical fibers are obtained by drawing from a conven-
tional single-mode optical fiber SMF-28.
Fig. 7 schematically shows the image of a biconical
fiber.
The fiber structure includes a constriction about
2.5 μm in diameter, connected by conical junctions with
120 μm fiber parts.
ISSN 1562-6016. ВАНТ. 2018. №4(116) 291
Fig. 7. Schematic representation of a biconical fiber
Thus, using this technique, based on the published da-
ta [4], it is possible to obtain a broadening of the spec-
trum to a width equal to two optical octaves (Fig. 8).
Fig. 8. The radiation spectrum at the output
of a biconical fiber
The device for drawing biconical fibers provides the
production of fibers with a total length of up to 20 cm.
Fig. 9 shows a general view of the device for drawing
biconical fibers created at the NSC KIPT.
Fig. 9. General view of the device
for drawing biconical fibers
Fig. 10. A photo of a protective casing
of a biconical fiber
To protect the fiber from dust, mechanical damage
and other undesirable effects affecting them, a protec-
tive casing design was developed and manufactured, the
photo of which is presented in Fig. 10.
It was of interest to find out the possibility of obtain-
ing supercontinuum on other, more compact samples.
As samples, quartz and window glass plates having the
same thickness of 2 mm were tested and the breakdown
in air was investigated. Fig. 11 shows the spectra of
supercontinuums for various samples.
530 610 690 770 850 930 1010
150
420
690
960
1230
1500
530 610 690 770 850 930 1010
150
240
330
420
510
600
Window Glass Air
530 610 690 770 850 930 1010
150
320
490
660
830
1000
530 610 690 770 850 930 1010
150
720
1290
1860
2430
3000
Quartz Newport Fiber
Fig. 11. Spectra of supercontinuums for various samples
The acquisition of such ultra-wideband spectra finds
its application in metrology, space navigation, relativ-
istic gravimetry [5].The next direction of applications is
related to the CPA-installation, which provides an out-
put power level from 1010 W to 1 TW. The level of in-
put power of 1010 W, received to date at NSC KIPT, we
plan to use to accelerate electrons using the latest tech-
nology associated with the use of chips [6]. Quartz chips
have extremely small dimensions on the order of
25×150 μm with grooves applied on the surface, ap-
proximately 1400 per mm. Dimensions of accelerators
based on them significantly decrease and can have di-
mensions from mm and more, depending on the re-
quired acceleration rates. Acceleration experiments on
chips, described in the literature [6], indicate the possi-
bility of obtaining an acceleration rate of 850 MeV/m.
To this end, afs Ti-Sa laser with a pulse energy of
150 μJ, i.e., with the energy achievable at a laser facility
created by the NSC KIPT, was used.
Fig. 12 shows the proposed scheme of a desktop ac-
celerator based on the use of an accelerating structure
on two chips. It will use the system created in the NSC
KIPT CPA, which even with one amplifier gives an
output energy of up to 1000 μJ. To generate electrons, a
new method based on a tungsten nanotape [6] will be
used, which will ensure compact longitudinal (several
mm) and transverse (tens of nm) beam dimensions.
Fig. 12. Accelerator circuit on chips
The third direction of applications is associated with
the application of the laser-based CPA system, provid-
ing an output power level of up to 10 TW and above.
When receiving a system of pulses with a power of
1 TW and higher at the output of the CPA, this system
can be used to implement the method proposed and de-
veloped in the late 80 s of the last century in the KIPT
by N.A. Khizhnyak and S.V. Zhilkov [7]. The essence
ISSN 1562-6016. ВАНТ. 2018. №4(116) 292
of the method is the acceleration of charged particles by
surface electromagnetic waves excited above the dielec-
tric surface by a powerful laser beam, which is guided
from the inside of the dielectric to the boundary of its
separation from the external medium at an angle ex-
ceeding the limiting angle of total internal reflection
(Fig. 13).
Fig. 13. Scheme of acceleration of an electron beam
by surface electromagnetic waves
Such an accelerating structure for the performed cal-
culations provides a rate of acceleration up to 1 GeV/m.
If we apply a scheme similar to Fig. 13, it is possible to
achieve large values of the rate of acceleration. Another
planned application of the TW CPA system is the accel-
eration of electrons in the laser plasma [8], followed by
acceleration on the chips (Fig. 14).
Fig. 14. Scheme of electron acceleration in a laser
plasma with subsequent acceleration on chips
The universality of the laser system developed at our
institute CPA provides the possibility of constructing
various configurations of accelerator systems. One of
the proposed schemes for electron acceleration in a laser
plasma with subsequent acceleration on chips is shown
in Fig. 14. At the first stage, relativistic electrons are
obtained, and at the second stage, their further accelera-
tion. The plasma is formed by an Nd-YAG laser, which
is used to pump the first CPA amplifier of the laser sys-
tem, part of the pump radiation, less than 50 mJ, is di-
rected to the target. Nylon can be used as a target mate-
rial. As an accelerator, a focused beam of a CPA system
is used, with parameters such as a wavelength of
800 nm, a pulse duration of 30 fs, and an energy in the
pulse of 210 mJ. That is, it is possible to obtain an out-
put power of up to 7 TW. Part of the radiation is divert-
ed directly to the chip-accelerator, thereby completing
the integrated system of the desktop accelerator.
Thus, possible directions of application of various
components of the laser system are shown. Possible
methods for obtaining a supercontinuumare described,
and a ready-made device for obtaining biconical fibers
is presented. Also, possible schemes for the use of the
CPA of a laser system for accelerating electrons are
indicated.
Work was partially supported by the Ukrainian
budget program "Support for the most important direc-
tions of scientific researches" (КПКВК 6541230).
REFERENCE
1. A.I. Povrozin, I.N. Onischenko, A.M. Egorov,
V.P. Zaitsev, A.V. Vasiliev, V.P. Leschenko,
P.I. Nejmakov. Femtosecond laser − wide possibili-
ties of application // Metrology and Technology.
2014, p. 8-11.
2. PG. Kryukov. Lasers of ultrashort pulses // Quantum
Electronics. 2001, v. 31, № 95.
3. Th. Udem, J. Reichert, R. Holzwarth, and T.W. Hansch.
Accurate measurement of the large optical frequency
differences with a mode-locked laser / Optics Let-
ters. 1999, v. 24, № 13, p. 881.
4. T.A. Birks, W.J. Wadsworth, and P.St.J. Russell.
Supercontinuum generation in tapered fibers // Op-
tics Letters. 2000, v. 25, № 19, p. 1415.
5. E.V. Baklanov, P.V. Pokasov. Optical frequency
standards and femtosecond lasers // Quantum Elec-
tronics. 2003, 31, № 5, p. 383.
6. J. Breuer. Dielectric laser acceleration of non-
relativistic electrons at a photonic structure. Mun-
chen, 2013, p. 106.
7. I.V. Borovsky, S.V. Zhilkov. N.A. Khizhnyak,
V.G. Papkovich. On accelebration by surface elec-
tromagnetic waves over a dielectric comb// Prob-
lems of Atomic Science and Technology. Series
“Tech. Phys. Exper.” 1987, № 3(35), p. 68-69.
8. N.C. Pathak. Laser Pulse Propagation in Plasmas
and its implication on frequency up-shift and elec-
tron acceleration / Pisa / 2011, p. 134.
Article received 09.02.2018
РАБОТЫ В ННЦ ХФТИ ПО СОЗДАНИЮ И ПРИМЕНЕНИЮ СРА-ЛАЗЕРНОЙ СИСТЕМЫ
А.В. Васильев, А.Н. Довбня, А.М. Егоров, В.П. Зайцев, В.П. Лещенко, И.Н. Онищенко, А.И. Поврозин, Г.В. Сотников
Представлена СРА-лазерная система с выходной мощностью 1010 Вт, которая на завершающем этапе будет доведена
до мощности, близкой к 10 ТВт. Описаны области ее применения, представлены результаты исследования
суперконтинуума на фотонно-кристаллических волокнах и на других образцах. Разработана методика и устройство для
изготовления биконических волокон с целью получения на них суперконтинуума. Предложены различные варианты
возможного применения СРА-лазерных систем для исследования схем перспективных ускорителей, в том числе на чипах
и на поверхностных электромагнитных волнах.
РОБОТИ В ННЦ ХФТІ ПО СТВОРЕННЮ І ЗАСТОСУВАННЮ СРА-ЛАЗЕРНОЇ СИСТЕМИ
А.В. Васильєв, А.Н. Довбня, А.М. Єгоров, В.П. Зайцев, В.П. Лещенко, І.М. Онищенко, А.І. Поврозін, Г.В. Сотников
Представлена СРА-лазерна система з вихідною потужністю 1010 Вт, яка на завершальному етапі буде доведена до
потужності, близької до 10 ТВт. Описано області її застосування, представлені результати дослідження суперконтинуу-
ма на фотонно-кристалічних волокнах і на інших зразках. Розроблено методику та пристрій для виготовлення біконіч-
них волокон з метою отримання на них суперконтинуума. Запропоновано різні варіанти можливого застосування СРА-
ISSN 1562-6016. ВАНТ. 2018. №4(116) 293
лазерних систем для дослідження схем перспективних прискорювачів, в тому числі на чіпах і на поверхневих електро-
магнітних хвилях.
|
| id | nasplib_isofts_kiev_ua-123456789-147667 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T17:59:37Z |
| publishDate | 2018 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Vasiliev, A.V. Dovbnya, A.N. Yegorov, A.M. Zaitsev, V.P. Leshchenko, V.P. Onischenko, I.N. Povrozin, A.I. Sotnikov, G.V. 2019-02-15T17:28:24Z 2019-02-15T17:28:24Z 2018 Works in the NSC KIPT on the creation and application of the CPA laser system / A.V. Vasiliev, A.N. Dovbnya, A.M. Yegorov, V.P. Zaitsev, V.P. Leshchenko, I.N. Onischenko, A.I. Povrozin, G.V. Sotnikov // Вопросы атомной науки и техники. — 2018. — № 4. — С. 289-292. — Бібліогр.: 8 назв. — англ. 1562-6016 PACS: 41.75.Jv https://nasplib.isofts.kiev.ua/handle/123456789/147667 A CPA laser system with an output power of 10¹⁰ W is presented, which at the final stage will be brought to a
 power close to 10 TW. The areas of its application are described, the results of the supercontinuum investigation on
 photonic crystal fibers and other samples are presented. A technique and device for manufacturing biconical fibers
 for the purpose of obtaining a supercontinuum on them has been developed. Different schemes of accelerators, including those on chips and surface electromagnetic waves, have been proposed. Представлена СРА-лазерна система з вихідною потужністю 10¹⁰ Вт, яка на завершальному етапі буде доведена до
 потужності, близької до 10 ТВт. Описано області її застосування, представлені результати дослідження суперконтинуума на фотонно-кристалічних волокнах і на інших зразках. Розроблено методику та пристрій для виготовлення біконічних волокон з метою отримання на них суперконтинуума. Запропоновано різні варіанти можливого застосування СРА-лазерних систем для дослідження схем перспективних прискорювачів, в тому числі на чіпах і на поверхневих електромагнітних хвилях. Представлена СРА-лазерная система с выходной мощностью 10¹⁰ Вт, которая на завершающем этапе будет доведена
 до мощности, близкой к 10 ТВт. Описаны области ее применения, представлены результаты исследования
 суперконтинуума на фотонно-кристаллических волокнах и на других образцах. Разработана методика и устройство для
 изготовления биконических волокон с целью получения на них суперконтинуума. Предложены различные варианты
 возможного применения СРА-лазерных систем для исследования схем перспективных ускорителей, в том числе на чипах
 и на поверхностных электромагнитных волнах. Work was partially supported by the Ukrainian
 budget program "Support for the most important directions
 of scientific researches" (КПКВК 6541230). en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Приложения и технологии Works in the NSC KIPT on the creation and application of the CPA laser system Роботи в ННЦ ХФТІ по створенню і застосуванню СРА-лазерної системи Работы в ННЦ ХФТИ по созданию и применению СРА-лазерной системы Article published earlier |
| spellingShingle | Works in the NSC KIPT on the creation and application of the CPA laser system Vasiliev, A.V. Dovbnya, A.N. Yegorov, A.M. Zaitsev, V.P. Leshchenko, V.P. Onischenko, I.N. Povrozin, A.I. Sotnikov, G.V. Приложения и технологии |
| title | Works in the NSC KIPT on the creation and application of the CPA laser system |
| title_alt | Роботи в ННЦ ХФТІ по створенню і застосуванню СРА-лазерної системи Работы в ННЦ ХФТИ по созданию и применению СРА-лазерной системы |
| title_full | Works in the NSC KIPT on the creation and application of the CPA laser system |
| title_fullStr | Works in the NSC KIPT on the creation and application of the CPA laser system |
| title_full_unstemmed | Works in the NSC KIPT on the creation and application of the CPA laser system |
| title_short | Works in the NSC KIPT on the creation and application of the CPA laser system |
| title_sort | works in the nsc kipt on the creation and application of the cpa laser system |
| topic | Приложения и технологии |
| topic_facet | Приложения и технологии |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/147667 |
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