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The tetragonal germanates Sr2MgGe2O7 and Ba2ZnGe2O7 were found tobe attractive, simultaneously χ(2)‐ and χ(2)‐active nonlinear multifunctional crystals. Their basic optical properties were investigated and numerous nonlinearlaser effects, among them SRS, more than one‐octave Stokes and anti‐Stokes combs, SHG, THG, SFG, and efficient cascaded self‐conversion (χ(3) ↓ χ(2))‐generation were observed in...
Nonlinear optical interactions based on χ(2) and χ(3) effects were investigated in the tetragonal, non‐centrosymmetric melilite‐type crystal Sr2ZnGe2O7. Among them are Stokes and anti‐Stokes lasing comb generation, SHG, THG, SFG, and cascaded χ(3) ↔ χ(2) self‐frequency conversion, arising from onemicron picosecond pumping. All lasing components were identified and attributed to a single SRS‐promoting...
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