Prospect of second order nonlinear crystals for broadband ultrashort mid-IR pulse generation

• Published in: Optical materials Vol. 121; p. 111635
• Main Authors: Kinyaevskiy, I.O., Sagitova, A.M., Andreev, YuM
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2021
• Subjects: Frequency conversion; Mid-IR pulse; Nonlinear crystals; Ultrafast laser; Ultrafast laser; Frequency conversion; Mid-IR pulse; Nonlinear crystals
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2021.111635

Several second order nonlinear crystals were numerically studied from a point of view of broadband ultrashort mid-IR pulse generation. The following crystals were considered: AgGaS2, AgGaSe2, BaGa2GeSe6, CdGePAs2, CdSiP2, GaSe, HgGa2S4, PbIn6Te10, and ZnGeP2. Crystal properties responsible for efficient frequency conversion were estimated. The optimal pump laser wavelength, mid-IR pulse bandwidth, and relative efficiency were determined and compared for each crystal.
•second order nonlinear crystals.•AgGaS2, AgGaSe2, BaGa2GeSe6, CdGePAs2, CdSiP2, GaSe, HgGa2S4, PbIn6Te10, ZnGeP2.•Ultrashort mid-IR pulse generation.•Broadband frequency conversion.