[1] [1] Yin W, Feng K, He R, et al. BaGa2MQ6 (M=Si, Ge; Q=S, Se): a new series of promising IR nonlinear optical materials[J].Dalton Transaction,2012,41(18):5653-5661.

          Yin W, Feng K, He R, et al. BaGa2MQ6 (M=Si, Ge; Q=S, Se): a new series of promising IR nonlinear optical materials[J].Dalton Transaction,2012,41(18):5653-5661.

[3] [3] Lin X, Guo Y, Ye N. BaGa2GeX6 (X=S, Se): new mid-IR nonlinear optical crystals with large band gaps [J].Journal of Solid State Chemistry,2012,195:172-177.

          Lin X, Guo Y, Ye N. BaGa2GeX6 (X=S, Se): new mid-IR nonlinear optical crystals with large band gaps [J].Journal of Solid State Chemistry,2012,195:172-177.

[4] [4] Valeriy V B, Dmitrii V B, Vladimir B L, et al. Crystal growth and characterization of new quaternary chalcogenide nonlinear crystals for the mid-IR: BaGa2GeS6 and BaGa2GeSe6[J].Optical Materials Express,2016,6(9):2933-2938.

          Valeriy V B, Dmitrii V B, Vladimir B L, et al. Crystal growth and characterization of new quaternary chalcogenide nonlinear crystals for the mid-IR: BaGa2GeS6 and BaGa2GeSe6[J].Optical Materials Express,2016,6(9):2933-2938.

[5] [5] Kiyoshi K, Kentaro M, Valeriy V. B, et al. Phase-matching properties of BaGa2GeSe6 for three-wave interactions in the 0.778-10.5910 μm spectral range[J].Applied Optics,2018,57(26):7740-7743.

          Kiyoshi K, Kentaro M, Valeriy V. B, et al. Phase-matching properties of BaGa2GeSe6 for three-wave interactions in the 0.778-10.5910 μm spectral range[J].Applied Optics,2018,57(26):7740-7743.

[6] [6] Ionin A A, Badikov D V, Badikov V V, et al. Sum frequency generation of multi-line slab radio frequency discharge carbon monoxide laser system with intracavity nonlinear BaGa2GeSe6 crystal[J].Optics Letters,2018,43(18):4358-4361.

          Ionin A A, Badikov D V, Badikov V V, et al. Sum frequency generation of multi-line slab radio frequency discharge carbon monoxide laser system with intracavity nonlinear BaGa2GeSe6 crystal[J].Optics Letters,2018,43(18):4358-4361.

[7] [7] Ionin A A, Kinyaevskiy I O, Klimachev Y M, et al. Broadband (1.7-6.0 μm) multiline CO laser system with intra- and extra-cavity sum frequency generation in BaGa2GeSe6 crystals[J].Optics and Laser Technology,2019,115:205-209.

          Ionin A A, Kinyaevskiy I O, Klimachev Y M, et al. Broadband (1.7-6.0 μm) multiline CO laser system with intra- and extra-cavity sum frequency generation in BaGa2GeSe6 crystals[J].Optics and Laser Technology,2019,115:205-209.