Observation of chi((3))-nonlinear optical effects in stimulated Raman scattering (SRS)-active CsLa(WO4)(2) crystals: high-order Stokes and anti- Stokes generation and self-Raman CsLa(WO4)(2):Nd3+ laser converter

摘要

Tetragonal tungstate CsLa(WO4)(2):Nd3+ was found to be an attractive multifunctional simultaneously Nd-3+-laser and stimulated Raman scattering (SRS)-active crystal. A multitude of Stokes and anti-Stokes components is generated in the visible and near-infrared spectral region producing frequency combs with widths of similar to 8600 cm(-1) and similar to 9560 cm(-1) under pumping at 0.532 07 mu m and 1.064 15 mu m wavelengths, respectively. All registered nonlinear emission lines are identified and attributed to a single SRS-promoting vibration nu s(WO4) mode with energy of.SRS similar to 956 cm(-1). Moreover, a passively Q-switched LD-pumped nanosecond self-Raman CsLa(WO4)(2):Nd3+ laser is reported. An overview of Ln(3+)-doped tungstate self-Raman lasers is given as well.