Room-temperature high-order Stokes and anti-Stokes generation in orthorhombic ferroelectric-ferroelastic K3Nb3O 6(BO3)2 crystal

Abstract

Multiple stimulated Raman scattering (SRS) in orthorhombic K 3Nb3O6(BO3)2 crystal was observed under picosecond Nd3+: Y3Al5O 12-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 ωS ≈ 648 cm-1 of octahedral Nb3O63+ 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.