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Wyświetlanie 1-15 z 129
Tytuł:
Doping – problem nieświadomego społeczeństwa i polityki międzynarodowej państw
Doping – the Problem of the Unaware Society and International Politics of States
Autorzy:
Pepłowska, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/2194735.pdf
Data publikacji:
2022-12-22
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
doping
anti-doping policy
awareness of society
physical culture
Opis:
The definition of doping in the World Anti-Doping Code is an important instrument of international politics. While implications are obvious for the professional athletes participating in Olympic Games, they remain vague for the broader society – the followers of the Olympic struggles. The article is an attempt to indicate the problem faced by society, international institutions and states, trying to pursue an effective anti-doping policy. It presents a comprehensive description of one of the largest doping scandals with the participation of the Russian authorities in 2013–2014 and the results of the author’s research on society’s knowledge of doping in sports. Public awareness of banned substances and methods may turn out to be crucial while assessing the actions of governments and international institutions. Society may have insufficient knowledge about doping and may be unaware of its role in politics on an international scale. An ani-doping policy is a part of state policy, so it impacts the way of benefiting physical culture which is one of the areas creating the public sector.
Źródło:
Kultura-Społeczeństwo-Edukacja; 2022, 21, 1; 231-245
2300-0422
Pojawia się w:
Kultura-Społeczeństwo-Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Doping in Sport: The Case of Fencing
Autorzy:
Łuczak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1054883.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
doping
fencing
law
sport
Opis:
Most athletes in order to achieve satisfactory results have to train long and hard. However, some of them, aiming at victory at all costs, resort to doping. The benefits of winning are relatively small when compared to the damage of the human organism caused by doping. The phenomenon has been present in cycling, athletics, boxing, football, weightlifting and many other sport disciplines for many years. In fencing only few instances of the use of illegal substances during the competition were revealed, which was reflected in Polish and foreign sports press. In many European countries the use of doping is regulated by the anti-doping rules, regulations and policies that define these practices as penal acts. In Poland the problem of doping was first regulated by the Act on Physical Culture of 1984 and 1996 as well as the he Act of 1985 on Prevention of Drug Abuse. The regulations of FIE fencing competitions, prepared on the request of Polish Fencing Federation on the basis of the FIE competition rules in the disciplinary regulations of competitions prohibited the use of artificial stimulants during or before the competition. The aim of this paper is to present the threats in modern sports with particular attention to the phenomenon of doping in fencing, as well as in social terms. It is a case study and a study of selected issues connected to doping in contemporary sports. The author poses the question whether the fencers often are tempted to support their bodies with doping in order to achieve better results than the representatives of other sports? What percentage of the fencers were using illegal stimulants? Is there is a problem of doping in fencing, and if so, what is its scale?
Źródło:
Central European Journal of Sport Sciences and Medicine; 2016, 13, 1; 133-142
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Of Luck Both Epistemic and Moral in Questions of Doping and Non-Doping
Autorzy:
Kirkwood, Kenneth William
Powiązania:
https://bibliotekanauki.pl/articles/943814.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
doping
ethics
sport
moral luck
epistemic luck
case study
Opis:
This article is a case study of a question of possible doping and how our insights into our moral judgements about doping are subject to considerations of both moral, but more presciently, epistemic luck. The eternal ambiguity surrounding the prevalence of doping, and its impact on high-level sport make this question entirely relevant for our discussions about the ethics of performanceenhancement in sport.
Źródło:
Ethics in Progress; 2020, 11, 1; 77-84
2084-9257
Pojawia się w:
Ethics in Progress
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correction of the electric resistivity distribution of Si wafers using selective neutron transmutation doping (SNTD) in MARIA nuclear research reactor
Autorzy:
Tarchalski, M.
Kordyasz, A. J.
Pytel, K.
Dorosz, D.
Powiązania:
https://bibliotekanauki.pl/articles/146646.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
silicon wafer
thermal neutron doping
silicon resistivity homogeneity
silicon resistivity heterogeneity
neutron transmutation doping (NTD)
selective neutron transmutation doping (SNTD)
MARIA nuclear research reactor
Opis:
The result of the electric resistivity distribution modification in silicon wafers, by means of selective neutron transmutation doping (SNTD) method in the MARIA nuclear research reactor at Świerk/Otwock (Poland) is presented. Silicon wafer doping system has been fully designed for the MARIA reactor, where irradiation took place. The silicon wafer resistivity distribution after SNTD has been measured by the capacity voltage (C-V) method. In this article we show first results of this correction technique. The result of the present investigation is that the planar resolution of the correction process is about 4 mm. It is the full width at half maximum (FWHM) of the resistivity distribution produced by thermal neutrons irradiation of Si wafer through a 3 mm hole in the Cd-mask.
Źródło:
Nukleonika; 2012, 57, 3; 363-367
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wiedza i postawy trenerów w zakresie dopingu i przeciwdziałania temu zjawisku w sporcie
Knowledge and attitudes of sports coaches with regard to doping and counteracting doping in sport
Autorzy:
Sas-Nowosielski, Krzysztof
Szóstak, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/465004.pdf
Data publikacji:
2017-01-30
Wydawca:
Akademia Wychowania Fizycznego we Wrocławiu
Tematy:
doping
sport
trener
coach
Opis:
Background. The aim of the study was to establish the attitudes and knowledge of sports coaches with reference to doping and anti-doping policies. Material and methods. The study included 100 coaches representing 11 disciplines. They filled in an anonymous questionnaire assessing their knowledge of and attitudes toward doping. Results. The coaches’ overall anti-doping attitude is positive and quite strong (M = 4.55, SD = 0.65). The strongest partial attitude was toward sanctions for breaking anti-doping rules (M = 5.35, SD = 0.91), the weakest – toward the possibility of succeeding without doping (M = 3.92, SD = 1.35). In the three categories of knowledge items, the percentage of correct responses were similar: 54.17% for athletes’ rights and duties, 53.57% for doping control procedures, and 53.33% for banned performance-enhancing drugs. The main sources of information for coaches were the Internet and television. Conclusions. The anti-doping attitudes of coaches are positive but it seems necessary to increase their knowledge, especially with planned educational programs.
Źródło:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu; 2016, 55; 77-83
0239-4375
Pojawia się w:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Doping in E-Sports. an Empirical Exploration and Search for Sociological Interpretations
Doping w e-sporcie. Próba eksploracji empirycznej i poszukiwanie interpretacji socjologicznych
Autorzy:
Jasny, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1041118.pdf
Data publikacji:
2020-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
socjologia sportu
doping
e-sport
gry wideo
sociology of sport
e-sports
video games
Opis:
Electronic sports is a new phenomenon in scientific research. Many issues within it have not been systematically analyzed. The use of artificial substances to improve human physical abilities is most often addressed in the context of deviation in sports. E-sports partially reflects sporting functionality, but in the area of doping and anti-doping control in video game competitions, it is difficult to delineate the boundary between what is allowed and what is forbidden. The aim of this work is to reconstruct the social assessment of doping in e-sports based on the attitudes and experience of fans and players. Most players accept the use of stimulants, such as energy drinks. Some of them also observe the use of prohibited substances during games. E-sports enthusiasts usually support anti-doping controls modeled on traditional sports and emphasize the importance of structural determinants of the issue, such as allowing the use of prohibited means.
Na horyzoncie badań naukowych pojawiło się nowe zjawisko – sport elektroniczny. Wiele zagadnień w jego obrębie wciąż nie doczekało się usystematyzowanej analizy. Problem stosowania sztucznych substancji lub metod w celu poprawy fizycznych możliwości człowieka najczęściej podejmuje się w kontekście dewiacji w sporcie. E-sport częściowo odzwierciedla sportową funkcjonalność, ale w zakresie dopingu i kontroli antydopingowych we współzawodnictwie w grach wideo trudno postawić granicę między tym, co dozwolone, a tym, czego nie wolno robić. Celem prezentowanej pracy jest próba rekonstrukcji społecznej oceny zjawiska dopingu w e-sporcie na podstawie postaw oraz doświadczeń sympatyków i użytkowników gier. Graczy najczęściej charakteryzuje pozytywne nastawienie do stosowania substancji stymulujących, takich jak napoje energetyzujące. Niektórzy z nich w swoim otoczeniu obserwują przypadki stosowania niedozwolonych substancji podczas rozgrywek. Sympatycy e-sportu przeważnie popierają kontrole antydopingowe wzorowane na sporcie tradycyjnym i podkreślają znaczenie strukturalnych determinantów omawianego problemu, takich jak przyzwolenie otoczenia na stosowanie zabronionych środków.
Źródło:
Acta Universitatis Lodziensis. Folia Sociologica; 2020, 75; 85-99
0208-600X
2353-4850
Pojawia się w:
Acta Universitatis Lodziensis. Folia Sociologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uranium - Doping Effects on Structural and Spectral Features of Vanadate Ceramics
Autorzy:
Elsabawy, Khaled M.
Powiązania:
https://bibliotekanauki.pl/articles/1192708.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
212 Vanadate
Ceramic
ESR
IR
Uranium Doping
X- ray
Opis:
212-Vanadate ceramics with formula Bi2SrV2-xUxO9, where (0 ≤ x ≤ 0.6 mole ) were carefully synthesized by solution routes with sintering temperature at 880oC for 24 hrs. Structural analysis with XRD proved that uranium (IV)-dopant can substitute successfully until x = 0.55 mole on the Bi-layered perovskite crystal structure without damaging the original structure . It was observed that U – doping have slight to moderate effects on both ESR-signals and conduction mechanism of U-doped Bi-Sr-V-O regime. Electrical measurements indicated that the energy gap Eg and number of electrons in conduction band Ncb increase as the ratio of U doping increases from x = 0.05 till x = 0.6 mole respectively due to the increasing of paramagnetic character of uranium than vanadium.
Źródło:
World Scientific News; 2016, 30; 103-116
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Knowledge and Attitude in the Field of Doping in Young Athletes of Team Games
Autorzy:
Duda, Henryk
Stuła, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/2026888.pdf
Data publikacji:
2022-03-31
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
doping
youth
sports games
knowledge
Opis:
Contemporary sport is becoming more and more commercialized, hence the players strive to win at all costs, and to achieve this goal, they consider all means to be allowed. In order to be constantly on top, competitors change their training methods, use various aids, and finally direct their interests towards doping. Doping is considered to be the use of substances and all means intended to artificially increase physical fitness during sports competitions, which may be harmful to the ethics of sport or cause mental and physical harm to athletes. The aim of the research is to assess the knowledge of the problem and attitudes of young people practicing sports games towards the dangers of doping. Assessment of knowledge on the effects of the use of illicit means, and analysis of opinion on the use of doping and strengthening mechanisms for the adoption of pharmacological agents. Research on the knowledge about the use of support measures and doping in sport was carried out among talented youth practicing team sports games in randomly selected clubs of Małopolska, Silesia, Podkarpacie and Opole. Continuation studies were conducted in 2018-2020, they covered 60 girls and 60 boys, aged 16 years. The research was carried out using a questionnaire, the questions of which concerned the following problems: knowledge of the essence of sports doping, the relationship between doping and the principle of fair play in sport, support used in physical recreation, reasons for the use of doping, moral and criminal liability in the use of doping. When analyzing the results of the research, it should be noted that the use of doping in sport is negatively perceived by the examined youth. However, it can be assumed that the knowledge about the support and the problem of doping in sport is insufficient. Setting the main goal - sports success and the related financial rewards, as well as the willingness to be the best in the opinion of the respondents may narrow the boundaries, which may facilitate the decision to use support and doping. These observations seem to be very disturbing, as the analysis of research data concerns young people practicing sports at the stage of education and the utilitarian nature of physical activity.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2022, 37; 57-63
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oszustwo dopingowe w sporcie wyczynowym wśród kobiet w latach 1950–2017
Doping in women’s professional sport in years 1950–2017
Autorzy:
Łuczak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/464656.pdf
Data publikacji:
2018-03-28
Wydawca:
Akademia Wychowania Fizycznego we Wrocławiu
Tematy:
sport
doping
historia
kobiety
Opis:
Cel badań. W artykule przedstawiono zjawisko dopingu kobiet w sporcie w XX i XXI w. Wśród sportsmenek sztuczne wspomaganie wykryto w latach 50. XX w. W niektórych krajach powstał system maskowania dopingu przez władze państwowe. Doświadczenie w zakresie opracowywania i podawania leków wspomagających miały laboratoria antydopingowe, m.in. w Kreischa w NRD. Stosowanie niedozwolonych praktyk ukazano na przykładzie NRD, RFN, ZSRR, Chin, USA, Kenii i Polski. Materiał i metody. Materiał badawczy został zinterpretowany przy użyciu metod stosowanych w naukach historycznych: indukcyjnej, dedukcyjnej, komparatystycznej i analizy literatury specjalistycznej. Do sformułowania ostatecznych wniosków wykorzystano metodę syntezy. Wyniki. Praktyki dopingowe miały miejsce w wielu krajach. Od 1956 r. notuje się stosowanie wspomagania organizmów sportsmenek za pomocą testosteronu. Z czasem doszły bardziej udoskonalone niedozwolone środki oraz metody, takie jak np. doping ciążowy. Najbardziej zorganizowany doping pod kuratelą państwa miał miejsce w NRD, RFN, ZSRR, Chinach, USA, Kenii i w Polsce. Wnioski. W latach 50. XX w. zawodniczki – zwłaszcza w Związku Radzieckim – sporadycznie przyjmowały testosteron oraz steroidy anaboliczno-androgenne. Później liczba stosowanych środków dopingujących systematycznie rosła. Na większą skalę zaczęto je przyjmować dopiero w latach 70. i 80. XX w. Próbą zapanowania nad tym zjawiskiem są badania antydopingowe, jednak chęć zwycięstwa często przeważa nad zdrowym rozsądkiem.
Background. The paper discusses the problem of doping in women’s sport in the 20th and 21st centuries. The use of performance-enhancing substances in female athletes was first detected in the 1950s. The governments of certain states developed a system to mask doping; anti-doping laboratories, e.g. in Kreischa in the GDR, had experience in the production and application of supporting drugs. The paper analyses the cases of drug abuse in sport in East Germany, West Germany, the Soviet Union, China, USA, Kenya, and Poland. Material and methods. The source material was interpreted with the use of historical studies methods: induction, deduction, comparison, and literature analysis. Synthesis was applied in formulating the final research conclusions. Results. Doping practices occurred in many countries. Since 1956, supporting female athletes with the use of testosterone was observed. With time, more sophisticated illegal methods were included, e.g. pregnancy doping. The most intensive state-supervised doping programs were carried out in East Germany, West Germany, the Soviet Union, China, USA, Kenya, and Poland. Conclusions. In the 1950s, testosterone and anabolic-androgenic steroids were sporadically used in women’s sport, especially in the Soviet Union. Then, the number of doping drugs systematically increased; they were administered on an almost regular basis in the 1970s and 1980s. Anti-doping tests are an attempt to overcome the phenomenon; however, the thirst for victory often defies common sense.
Źródło:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu; 2018, 60; 118-134
0239-4375
Pojawia się w:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect Cd Doping on the Structural and Optical Properties of ZnO Thin Films
Autorzy:
Najim, J. A.
Rozaiq, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/412167.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ZnO thin films
semiconductor doping
optical properties
structure properties
Opis:
ZnO thin films with Cd/Zn nominal ratios of 0 %, 1 %, 3 %, 5 %, and 7 % and thickness of 0.7 μm were prepared by chemical spray pyrolysis. X-ray diffraction patterns showed that the films have polycrystalline structures and peaks matching the hexagonal ZnO structure. Crystallite sizes ranged from about 35 nm to 87 nm. As the doping concentration increased, full width at half maximum values decreased and crystallite sizes increased. The UV-Vis spectra of the ZnO:Cd films showed high transparency in the visible region. The optical band gap of the ZnO:Cd films decreased from 3.255 eV to 3.17 eV with increasing Cd doping concentration. The transition type was direct, thereby allowing transition. The ZnO:Cd thin films were annealed at 400 °C, and annealing treatment showed improvements in the properties of the derived films.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 137-150
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The negative implications of Russia’s doping scandal on the country’s international image
Autorzy:
Kobierecka, Anna
Kobierecki, Michał Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1041593.pdf
Data publikacji:
2019-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Russia
doping
sports diplomacy
nation branding
image of a country
Opis:
In December 2014, Russia was accused of developing a state-organized doping system in the second decade of the twenty-first century. The scandal resulted in many Russian athletes being banned from competing in the Olympics in Rio in 2016 and the IOC’s suspension of the Russian National Olympic Committee prior to the 2018 Winter Olympics in PyeongChang. The research presented in this article aims to answer the research question of whether the doping scandal actually affected the international image of Russia. The research was conducted with the use of frame analysis of public discourse. The hypothesis to be tested states that the Russian doping scandal contributed to the intensification of a negative external image of this state.
Źródło:
Eastern Review; 2019, 8; 161-182
1427-9657
2451-2567
Pojawia się w:
Eastern Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ozone decomposition on ZnO catalysts obtained from different precursors
Autorzy:
Milenova, Katya I.
Nikolov, Penko M.
Kasabova, Nikoleta A.
Avramova, Ivalina A.
Powiązania:
https://bibliotekanauki.pl/articles/778353.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ozone decomposition
zinc oxide catalyst
manganese doping
copper doping
nanosize
Opis:
Kinetic investigations for ozone conversion on three different series of zinc oxide catalysts, containing pure ZnO and doped with Mn or Cu one with dopant content less than 1 wt.% were carried out. The different samples were obtained from carbonate, nitrate and acetate precursors. The as prepared catalysts were characterized by AAS, XRD, IR, EPR and BET methods. The mean size of the crystallites determined by XRD data is in the range 27÷68 nm. The presence of Mn2+ and Cu2+ ions into the ZnO matrix was established by EPR. The ozone decomposition was investigated for 30÷75°C temperature range. The zinc carbonate precursor samples show highest activity, while the nitrate precursor ones show lowest activity toward reaction decomposition of ozone in the whole temperature range. At 75°C two of the catalyst, obtained from carbonate precursor - ZnO and CuZnO show 100% conversion.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 4; 55-59
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Co Doping on Structural and Optical Properties of NiO Thin Films Prepared By Chemical Spray Pyrolysis Method
Autorzy:
Bakr, N. A.
Salman, S. A.
Shano, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/412102.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
NiO thin films
Co Doping
Chemical Spray Pyrolysis
Optical Properties
Structural Properties
Opis:
In this work, nickel-cobalt oxide (Ni(1-x)CoxO) thin films, where x = 0, 4, 6 and 8 % have been successfully deposited on glass substrates by chemical spray pyrolysis (CSP) technique at substrate temperature of (400 °C) and thickness of about 300 nm. The structural and optical properties of these films have been studied using XRD, AFM, and UV-Visible spectroscopy. The XRD results showed that all films are polycrystalline in nature with cubic structure and preferred orientation along (111) plane. The crystallite size was calculated using Scherrer formula and it is found that the undoped NiO sample has maximum crystallite size (51.16 nm). AFM results showed homogenous and smooth thin films. The absorbance and transmittance spectra have been recorded in the wavelength range of (300-900) nm in order to study the optical properties. The optical energy gap for allowed direct electronic transition was calculated using Tauc equation. It is found that the band gap decreases as the Co-concentration increases and the band gap values were in the range of 3.58-3.66 eV and 3.58 eV for the prepared Nickel-Cobalt Oxide thin films. The Urbach energy increases as the Co-concentration increases and the Urbach. The optical constants including (absorption coefficient, real and imaginary parts of dielectric constant) were also calculated as a function of photon energy. Refractive index and extinction coefficient for Nickel- Cobalt Oxide thin films were estimated as a function of wavelength.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 41; 15-30
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thulium-doped optical fibers for fiber lasers operating at around 2 μm
Autorzy:
Kasik, I.
Kamradek, M.
Aubrecht, J.
Peterka, P.
Podrazky, O.
Cajzl, J.
Mrazek, J.
Honzatko, P.
Powiązania:
https://bibliotekanauki.pl/articles/200843.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical fiber
fiber laser
thulium
aluminum oxide
nanoparticles
solution doping
nanoparticle doping
Opis:
The paper deals with spectral and lasing characteristics of thulium-doped optical fibers fabricated by means of two doping techniques, i.e. via a conventional solution-doping method and via a nanoparticle-doping method. The difference in fabrication was the application of a suspension of aluminum oxide nanoparticles of defined size instead of a conventional chloride-containing solution. Samples of thulium-doped silica fibers having nearly identical chemical composition and wave guiding properties were fabricated. The sample fabricated by means of the nanoparticle-doping method exhibited longer lifetime, reflecting other observations and the trend already observed with the fibers doped with erbium and aluminum nanoparticles. The fiber fabricated by means of the nanoparticle-doping method exhibited a lower lasing threshold (by »20%) and higher slope efficiency (by »5% rel.). All these observed differences are not extensive and deserve more in-depth research; they may imply a positive influence of the nanoparticle approach on properties of rare-earth-doped fibers for fiber lasers.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 981-986
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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