Effect of CO{sub 2}-laser power density on the absorption coefficient of polycrystalline CVD diamonds
The effect of 1-s irradiation of an uncooled polycrystalline CVD diamond plate by a focused cw CO{sub 2} laser beam with a power density of 300 – 800 kW cm{sup −2} is investigated. The absorption coefficient of the sample at a power density of 800 kW cm{sup −2} is found to be 0.035 cm{sup −1} larger...
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| Veröffentlicht in: | Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-12, Vol.50 (12) |
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| container_title | Quantum electronics (Woodbury, N.Y.) |
| container_volume | 50 |
| creator | Andreeva, M. S. Artyushkin, N. V. Krymskii, M. I. Laptev, A. I. Polushin, N. I. Rogozhin, M. V. Rogalin, V.E. |
| description | The effect of 1-s irradiation of an uncooled polycrystalline CVD diamond plate by a focused cw CO{sub 2} laser beam with a power density of 300 – 800 kW cm{sup −2} is investigated. The absorption coefficient of the sample at a power density of 800 kW cm{sup −2} is found to be 0.035 cm{sup −1} larger as compared with that at 300 kW cm{sup −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 CO{sub 2}-laser power densities, at least up to 800 kW cm{sup −2}. (paper) |
| format | Article |
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| ispartof | Quantum electronics (Woodbury, N.Y.), 2020-12, Vol.50 (12) |
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| language | eng |
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| source | IOP Publishing Journals |
| subjects | ABSORPTION BEAMS CARBON DIOXIDE CHEMICAL VAPOR DEPOSITION COMPARATIVE EVALUATIONS DIAMONDS IRRADIATION LASERS MATERIALS SCIENCE NONLINEAR PROBLEMS PHONONS POLYCRYSTALS POWER DENSITY TEMPERATURE DEPENDENCE |
| title | Effect of CO{sub 2}-laser power density on the absorption coefficient of polycrystalline CVD diamonds |
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