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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Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2020-12, Vol.50 (12)
Main Authors: Andreeva, M. S., Artyushkin, N. V., Krymskii, M. I., Laptev, A. I., Polushin, N. I., Rogozhin, M. V., Rogalin, V.E.
Format: Article
Language:English
Subjects:
ABSORPTION
BEAMS
CARBON DIOXIDE
CHEMICAL VAPOR DEPOSITION
COMPARATIVE EVALUATIONS
DIAMONDS
IRRADIATION
LASERS
MATERIALS SCIENCE
NONLINEAR PROBLEMS
PHONONS
POLYCRYSTALS
POWER DENSITY
TEMPERATURE DEPENDENCE
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container_title Quantum electronics (Woodbury, N.Y.)
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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)
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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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