A Study of Effective Nonlinearity of BaGa2GeS6 Crystal by CO Laser Sum-Frequency Generation with Type-I and Type-II Phase Matching

Abstract: The sum-frequency generation of broadband CO laser radiation (λ ≈ 5–6 μm) in a new nonlinear BaGa2GeS6 crystal at type I and II phase matching at the variation of polar and azimuth angles of this crystal has been experimentally investigated. A small mismatch (~3°) between the values of measured and calculated phase matching angles was found. Also, based on experimental data and their comparison with calculations, a set of coefficients was determined of the nonlinear susceptibility tensor of BaGa2GeS6, which best describes the experimental results. © Allerton Press, Inc. 2024.

Authors
Ionin M.V. , Ionin A.A. , Kinyaevsky I.O. , Klimachev Y.M. , Koribut A.V. , Sagitova A.M. , Fedorova E.P. , Badikov D.V. , Safaraliev G.K.
Journal
Bulletin of the Lebedev Physics Institute
Publisher
Allerton Press Incorporation
Number of issue
Suppl 10
Language
English
Pages
S862-S869
Status
Published
Link
External link
DOI
10.3103/S1068335624601365
Volume
51
Year
2024
Organizations
  • 1 Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation
  • 2 Kuban State University, Krasnodar, Russian Federation
  • 3 Peoples’ Friendship University of Russia, Moscow, Russian Federation
Keywords
BaGa<sub>2</sub>GeS<sub>6</sub>; second harmonic generation; sum-frequency generation; СО laser
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