Room-temperature high-order Stokes and anti-Stokes generation in orthorhombic ferroelectric-ferroelastic K3Nb3O6(BO3)2 crystal

Multiple stimulated Raman scattering (SRS) in orthorhombic K3Nb3O6(BO3)2 crystal was observed under picosecond Nd3+:Y3Al5O12-laser excitation. All registered Stokes and anti-Stokes generation components in the visible and near-IR were identified and attributed to the SRS-active vibration modes ωSRS–1 ≈ 324 cm–1 and ωSRS–2 ≈ 648 cm–1 of octahedral units of studied crystal. Possible manifestation of resonance interaction between these vibrations with divisible frequencies is briefly discussed also. The first Stokes steady-state Raman gain coefficients in the one-micron spectral region were estimated as well. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)