CO laser frequency conversion in nonlinear crystals ZnGeP2 and GaSe

Yu. M. Andreev; A. Yu. Gerasimov; S. M. Grigoryants; A. A. Ionin; I. O. Kinyaevsky; Yu. M. Klimachev; A. Yu. Kozlov; A. A. Kotkov; G. N. Lanskii; A. N. Morozov

doi:10.1117/12.882815

17 February 2011 CO laser frequency conversion in nonlinear crystals ZnGeP₂ and GaSe

Yu. M. Andreev, A. Yu. Gerasimov, S. M. Grigoryants, A. A. Ionin, I. O. Kinyaevsky, Yu. M. Klimachev, A. Yu. Kozlov, A. A. Kotkov, G. N. Lanskii, A. N. Morozov

Author Affiliations +

Proceedings Volume 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies; 79941O (2011) https://doi.org/10.1117/12.882815
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

Abstract

Experimental and modeling results on CO laser frequency conversion are presented. A Q-switched multiline CO laser with pulse repetition rate 20-150 Hz of sub-microsecond pulses and electron beam sustained discharge frequency-tunable mode-locked CO laser were used in the experiments on second harmonic generation (SHG) in high-quality ZnGeP₂ and GaSe crystals. Internal SHG efficiency exceeded 12.4 % in 12 mm ZnGeP₂ crystal. The SHG in 4 mm GaSe crystal was observed with internal efficiency of 0.3%. A possibility of difference frequency generation of fundamental and firstovertone CO laser lines to cover spectral range of ~4.0-5.0 μm is discussed. It is estimated that the difference frequency generation of neighboring lines of both fundamental and first-overtone bands allows one to obtain oscillation in THz spectral range within ~200-3000 μm.

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Yu. M. Andreev, A. Yu. Gerasimov, S. M. Grigoryants, A. A. Ionin, I. O. Kinyaevsky, Yu. M. Klimachev, A. Yu. Kozlov, A. A. Kotkov, G. N. Lanskii, and A. N. Morozov "CO laser frequency conversion in nonlinear crystals ZnGeP₂ and GaSe", Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941O (17 February 2011); https://doi.org/10.1117/12.882815

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