Aspects for efficient wide spectral band THz generation via CO2 laser down conversion /Y. N. Panchenko, Y. M. Andreev, G. V. Lanskii [et.al.]

Электронный ресурс
Другой Автор
Panchenko, Yu. N.
Lanskii, Grigory V.
Losev, V. F.
Lubenko, D. M.
Andreev, Yury M. 1946-
Источник
Proceedings of SPIE 2015 Vol. 9255 : XX International Symposium on High-Power Laser Systems and Applications, 2014. P. 92554P-1-92554P-9
Аннотация
Detailed model study of THz generation by CO2 laser down-conversion in pure and solid solution crystals GaSe1-xSx is carried out for the first time. Both forward and backward collinear interactions of common (eo-e, oe-e, oe-o, oo-e, ee-o) and original (ee-e, oo-o) types are considered. Possibility of realization, phase matching angles and figure of merits are estimated for line mixing within 9 μm and 10 μm emission bands, as well between them. Dispersion properties of o- and e-wave refractive indices and absorption coefficients for GaSe, GaS and GaSe1-xSx crystals were preliminary measured by THz-TDS, approximated in the equation form and then used in the study. Estimated results are presented in the form of 3-D figures that are suitable for rapid analyses of DFG parameters. The most efficient type of interaction is eo-o type. Optimally doped (x = 0.09-0.13) GaSe1-xSx crystals are from 4 to 5 times more efficient at limit pump intensity than not doped GaSe crystals. Aspects for efficient wide spectral band THz generation via CO2 laser down conversion (PDF Download Available). Available from: https://www.researchgate.net/publication/281993171_Aspects_for_efficient_wide_spectral_band_THz_generation_via_CO2_laser_down_conversion [accessed May 3, 2017].
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$a Detailed model study of THz generation by CO2 laser down-conversion in pure and solid solution crystals GaSe1-xSx is carried out for the first time. Both forward and backward collinear interactions of common (eo-e, oe-e, oe-o, oo-e, ee-o) and original (ee-e, oo-o) types are considered. Possibility of realization, phase matching angles and figure of merits are estimated for line mixing within 9 μm and 10 μm emission bands, as well between them. Dispersion properties of o- and e-wave refractive indices and absorption coefficients for GaSe, GaS and GaSe1-xSx crystals were preliminary measured by THz-TDS, approximated in the equation form and then used in the study. Estimated results are presented in the form of 3-D figures that are suitable for rapid analyses of DFG parameters. The most efficient type of interaction is eo-o type. Optimally doped (x = 0.09-0.13) GaSe1-xSx crystals are from 4 to 5 times more efficient at limit pump intensity than not doped GaSe crystals. Aspects for efficient wide spectral band THz generation via CO2 laser down conversion (PDF Download Available). Available from: https://www.researchgate.net/publication/281993171_Aspects_for_efficient_wide_spectral_band_THz_generation_via_CO2_laser_down_conversion [accessed May 3, 2017].
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Предмет
статьи в журналах
Резюме
Detailed model study of THz generation by CO2 laser down-conversion in pure and solid solution crystals GaSe1-xSx is carried out for the first time. Both forward and backward collinear interactions of common (eo-e, oe-e, oe-o, oo-e, ee-o) and original (ee-e, oo-o) types are considered. Possibility of realization, phase matching angles and figure of merits are estimated for line mixing within 9 μm and 10 μm emission bands, as well between them. Dispersion properties of o- and e-wave refractive indices and absorption coefficients for GaSe, GaS and GaSe1-xSx crystals were preliminary measured by THz-TDS, approximated in the equation form and then used in the study. Estimated results are presented in the form of 3-D figures that are suitable for rapid analyses of DFG parameters. The most efficient type of interaction is eo-o type. Optimally doped (x = 0.09-0.13) GaSe1-xSx crystals are from 4 to 5 times more efficient at limit pump intensity than not doped GaSe crystals. Aspects for efficient wide spectral band THz generation via CO2 laser down conversion (PDF Download Available). Available from: https://www.researchgate.net/publication/281993171_Aspects_for_efficient_wide_spectral_band_THz_generation_via_CO2_laser_down_conversion [accessed May 3, 2017].