Measurement of optical absorption in polycrystalline CVD diamond plates by the phase photothermal method at a wavelength of 10.6 μm
| Autor: | A. V. Khomich, A V Savel'ev, Vitali I. Konov, V. G. Ralchenko, A. Yu. Luk’yanov, P. V. Volkov, E V Serdtsev |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Synthetic diamond business.industry Material properties of diamond Statistical and Nonlinear Physics Chemical vapor deposition Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Surface coating Optics Thermal conductivity law Attenuation coefficient Phase (matter) Optoelectronics Electrical and Electronic Engineering business Absorption (electromagnetic radiation) |
| Zdroj: | Quantum Electronics. 38:1171-1178 |
| ISSN: | 1468-4799 1063-7818 |
| Popis: | A highly-efficient phase photothermal method is developed for quantitative measurements of the small optical absorption coefficient in thin plates made of highly transparent materials in which bulk losses significantly exceed surface losses. The bulk absorption coefficient at 10.6 μm is estimated in polycrystalline diamond plates grown from the vapour phase (a CVD diamond). The results are compared with those for natural and synthetic diamond single crystals and with the concentrations of nitrogen and hydrogen impurities. The absorption coefficient of the best samples of the CVD diamond did not exceed 0.06 cm-1, which, taking into account the high thermal conductivity of the CVD diamond (1800–2200 W mK-1 at room temperature), makes this material attractive for fabricating output windows of high-power CO2 lasers, especially for manufacturing large-size optics. |
| Databáze: | OpenAIRE |
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