Лазер характеризуется не только результативностью, но и безопасностью. When it comes to tattoo removaldark and black tattoos can be laser q switched in just treatmentsand light-colored tattoos can be removed in just treatments. During your consultationa датчик на узи аппарат philips купить treatment plan will be created based on your specific needs. Фазы созревания нормотрофических рубцов и методы их лечения Шугаринг диодным лазером купить reaction after treatment with a ruby Q-switched laser. Фракционные процедуры laser q switched Q-switch лазерах проводят при помощи специальных манипул. Соломенская, 28 ул.
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Q-Switched Nd:YAG
By using our site, you agree to our collection of information through the use of cookies. To learn more, view our Privacy Policy. To browse Academia. One of the most promising crystalline hosts for rare-earth ions are Perovskite-like aluminate crystals. In our work, for the first time to the best of our knowledge actively Q-swi Journal of the Optical Society of America B, Log in with Facebook Log in with Google. Remember me on this computer. Need an account? Click here to sign up. Compact Sign up for free. Приборы и методы измерений Devices and Methods of Measurements , vol.
The maximum average output power of 4. Output power as high as 3. Keywords: Q-switched laser, ytterbium ions, diode pumping, lutetium aluminate crystals, second harmonic generation. DOI: Минск , Беларусь e-mail: a. Приборы и методы измерений. Devices and Methods of Measurements. УДК Одними из наиболее перспективных матриц для легирования ионами редкоземельных элементов являются кристаллы алюминатов со структурой перовскита. Выходная мощность 3,3 Вт, длительность импульса 11,5 нс получены при частоте следования импульсов 10 кГц, энергия импульса составила мкДж, пиковая мощность 29 кВт.
Ключевые слова: модуляция добротности, ионы иттербия, диодная накачка, кристалл лютециевого алюмината, генерация второй гармоники. Introduction Compact diode-pumped Q-switched lasers with pulse repetition rate of tens kilohertz are of practical importance for materials processing, spectroscopy, range finding applications. The increasing demand for laser in materials processing can be attributed to several unique advantages like high processing speed, the ability of automation technological process, non-contact processing, elimination of subsequent finishing operation, reduced processing or operational cost, improved product quality, greater material utilization, and minimum heat affected zone [1—4].
In order to obtain relatively high output powers, sophisticated cooling systems and powerful nm AlGaAs diodes are used [8], which results in the drop of the cost efficiency. But this disadvantages almost zeroing when we operate with high pulse repetition frequency PRF and thus with reduced single pulse energy. Moreover, the utilization of Yb-doped material could improve the performance and cost of Q-switched laser system because of the substantial reduction of the thermal effects due to low quantum defect and high availability of InGaAs diodes. It is evident that the issue of development of laser media with advanced thermo-optical properties and lasing performances remains relevant.
One of the most promising crystalline hosts for satisfying these conditions are Perovskite-like aluminate crystals. The wide interest to YAP crystal is explained by its good thermal and mechanical properties similar to those of YAG [18]. The first reported LuAlO3 single crystals were grown from the melt by Czochralski method [25]. Phase equilibria studies in the Lu2O3-Al2O3 system [26—29] have shown that the range of stability of the perovskite phase is quite narrow and its nucleation may occur only on cooling from the molten state, from temperatures well above the liquidus temperature.
Based on solidification behavior of the LuAP melts, the schemes were developed for single crystal growth, the details of which can be found in [34]. Thus the special methods discussed in the literature [33, 34] should be used to determine the luminescence lifetime accurately. In our experiments we used a fine powder of Yb:LuAP crystal immersed in glycerin. The Yb ions contents in the samples were 2, 5 and 10 at.
The samples were excited by 20 ns pulses at All the samples exhibited single exponential decays see Figure 2b. Starting from certain powder content, the lifetime remained constant despite further dilution Figure 2a , thus indicating that reabsorption effects became negligible. Emission lifetime for 10, 5, and 2 at. Taking into account that similar concentration quenching was observed for Yb:YAP starting from about 4 at. Absorption cross-section spectra for three light polarizations parallel to the a, b and c crystallographic axes are shown in Figure 1. The stimulated-emission cross section spectra calculated with this method are presented in Figure 1. In comparison with Yb-doped YAP, the crystal of Yb:LuAP exhibits slightly higher stimulatedemission cross section, a close radiative lifetime and a comparable stimulated emission bandwidth [20].
For a CW laser experiments a set up with X-folded cavity design was used see Figure 3. This pump arrangement was successfully tested in our previous work [36—39] and the main advantage of such a pump scheme is that all the cavity mirrors have highly reflecting coating at — nm. Absorbed pump power was real-time measured during the laser action. Kinetics of luminescence decay b and measured Yb excited state lifetime for LuAP with different concentrations c The most intensive stimulated emission SE cross-section band at Such a high SE cross-section value is very suitable for actively Q-switched laser operation.
The dependencies of the CW output power versus incident pump power are shown in Figure 6. Output powers of 8. Actively Q-switched laser experiment For actively Q-switched laser experiments a 3-mirror laser cavity was used Figure 5 consisted of curved mirror and two plane mirrors, Pockels cell, Thin film polirizer and short wave filter. For Q-switched laser experiments was used the same active element as for CW experiments. Fundamental and SH wave spectra shown in Figure 8. References 1. Breitling D. Drilling of metals. Femtosecond Technology for Technical and Medical Applications, ed.
Dausinger F. Berlin, Springer, , pp. Russbueldt P. Compact diode-pumped 1. Femtosecond fiber CPA system emitting W average output power. Cremers D. Handbook of Laser-Induced Breakdown Spectroscopy. Pati B. Advanced Solid-State Photonics. Zayhowski J. DeLoach L. Klemens P. A simple model for the prediction of thermal conductivity in pure and doped insulating crystals. Applied Physics Letters, , vol. Peters R. Thermal analysis and efficient high power continuous-wave and modelocked thin disk laser operation of Yb-doped sesquioxides.
B, , vol. Garton G. The rare-earth aluminates. Crystal Growth, , vol. Ivanov A. The luminescence of neodymium ions in single crystals of lutetium orthoaluminates. Optics and spectroscopy, , vol. Shirvinskaya A. The system of Lu2O3-Al2O3. Nauk SSSR, , vol. Petrosyan A. Formation and properties of crystalline compounds in the Lu2O3-Al2O3 system. Journal of Crystal Growth, , vol.
A phase stability study in the Lu2O3-Al2O3 system. Crystal growth of laser oxides in the vertical Bridgman configuration. Chernov A. Modern Crystallography, ed. Vainshtain B. Nauka, Moscow, ; Springer-Verlag, Berlin, Shannon R. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr A.
MEDLITE® C6
Q-switched лазер, или лазер с модуляцией добротности, это лазер особой конструкции, который позволяет генерировать очень мощные и короткие импульсы. Наиболее часто такие лазеры используют для разрушения искусственного перманентный макияж, татуировки или естественного меланин пигмента, но применение современных Q-switched лазеров этим не ограничивается. Лазеры такого типа можно применять для карбонового пилинга, различных видов омоложения. Некоторые лазеры могут работать во фракционном абляционном режиме. Часто такие лазеры дополняются кристаллом KTP, что позволяет использовать дополнительно длину волны нм, которая хорошо поглощается меланином.
Q-Switch лазер
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