Effect of CO2-laser power density on the absorption coefficient of polycrystalline CVD diamonds
| Autor: | N. I. Polushin, M.I. Krymskii, M. S. Andreeva, A. I. Laptev, V. E. Rogalin, N. V. Artyushkin, M.V. Rogozhin |
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| Rok vydání: | 2020 |
| Předmět: |
Co2 laser
Materials science business.industry Statistical and Nonlinear Physics Radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention law Attenuation coefficient Optoelectronics Crystallite Electrical and Electronic Engineering business Power density Pyrometer Mathematical simulation |
| Zdroj: | Quantum Electronics. 50:1140-1145 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qel17423 |
| Popis: | The effect of 1-s irradiation of an uncooled polycrystalline CVD diamond plate by a focused cw CO2 laser beam with a power density of 300 – 800 kW cm−2 is investigated. The absorption coefficient of the sample at a power density of 800 kW cm−2 is found to be 0.035 cm−1 larger as compared with that at 300 kW cm−2, which is related to the temperature dependence of its phonon-induced absorption with a change in temperature from 44 to 100 °C. It is shown that polycrystalline diamond, in contrast to other optical materials, does not exhibit nonlinear (avalanche-like) rise in absorption at high CO2-laser power densities, at least up to 800 kW cm−2. |
| Databáze: | OpenAIRE |
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