Broadband CO Laser with Intracavity Frequency Conversion for Plasma Diagnostics
https://doi.org/10.56304/S207956292201016X
Abstract
In this work, we experimentally study intracavity frequency conversion of CO laser radiation in a nonlinear ZnGeP2 crystal under noncritical phase matching. Various configurations of a laser cavity are considered, in one of which the nonlinear crystal itself was an output mirror. The spectrum of the converted radiation was shifted into the short-wavelength region due to the temperature tuning of the phase matching in the nonlinear crystal. The maximum average lasing power was obtained at room crystal temperature and an output mirror with a transmission T ~ 10% for the fundamental band, and reached ~7.0 mW. The power ratio of sum frequency generation and the CO laser radiation was ~16%, which turned out to be higher than the value obtained earlier with the BaGa2GeSe6 crystal (11.5%) at the same laser facility.
Keywords
CO laser,
plasma diagnostics,
phase matching temperature tuning,
sum frequency generation,
nonlinear ZnGeP2 crystal
Supporting agencies: Russian Science Foundation, project no. 16-19-10619
About the Authors
A. A. Ionin
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
I. O. Kinyaevskiy
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
Yu. M. Klimachev
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
A. Yu. Kozlov
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
A. A. Kotkov
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
A. M. Sagitova
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
D. V. Sinitsyn
Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991 Russia
Russian Federation
Russian Federation
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Review
For citations:
Ionin A.A., Kinyaevskiy I.O., Klimachev Yu.M., Kozlov A.Yu., Kotkov A.A., Sagitova A.M., Sinitsyn D.V. Broadband CO Laser with Intracavity Frequency Conversion for Plasma Diagnostics. Nuclear Physics and Engineering. 2022;13(1):91-98. (In Russ.) https://doi.org/10.56304/S207956292201016X
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