Cascade х(3)-nonlinear processes in new SRS active Ca2MgSi2O7 crystal

The observation of stimulated Raman scattering (SRS) in magnesium silicate Ca2MgSi2O7, entering the family of D32d-tetragonal acentric crystals with the structure of melilite, is reported. The registered components of the Stokes and anti-Stokes Χ(3)-nonlinear crystal lasing are identified with two active SRS‑modes ωSRS1 ≈ 908 cm‑1 and ωSRS2 ≈ 668 cm‑1, which also manifest in the generation of combined phonon modes ωSRS3C ≈ 170 cm‑1 and ωSRS4C ≈ 1270 cm‑1.