Resistance of diamond optics to high-power fiber laser radiation
В. Е. РогалинNPO Astrophysics, Moscow, RussiaE. E. AshkenaziProkhorov Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, RussiaА. Ф. ПоповичProkhorov Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, RussiaVictor RalchenkoRussian Academy of SciencesВ. И. КоновProkhorov Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, RussiaS. M. AranchiiNPO Astrophysics, Moscow, RussiaM. V. RuzinС. А. УспенскийNational Research Nuclear University MIFI, Moscow, Russia
ABI
Аннотация
The resistance of optical windows and mirrors that are made of polycrystalline CVD diamonds (with a 25-mm diameter and 1.3-mm thickness) with a heat conductivity of 1970 W/mK is studied upon the radiation of the CW ytterbium laser (λ = 1.07 μm and the power is 10 kW). It is determined that the window withstands a power density of 11.7 MW/cm2, and a 25-layer interference mirror on a diamond plate was destroyed (without cooling) at 8.2 MW/cm2. The simulation of the water-cooled window showed that its maximum heating will not exceed 100°C at an incident power of 35 kW. It is shown that unique properties of the CVD diamond allow one to consider this material promising for applications in high-power lasers.
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