Stimulated Raman scattering of 35-ps pulses in BaWO(4) crystal was studied. The second harmonic of a Nd:YAG double-mode-locked laser system was used as a pump radiation source. The first Stokes conversion efficiency reached 38% in a single-pass setup and 85% in a double-pass setup. The second Stokes was generated with 20% (single-pass) and 50% (double-pass) conversion efficiency. Measurement of the temporal profiles of pump and first Stokes radiation with picosecond resolution was performed. The obtained conversion efficiency data were compared with the a plane-wave numerical model. BaWO(4) crystal can be considered an efficient Raman-active material for utilization in picosecond solid-state laser systems.
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http://dx.doi.org/10.1364/ol.27.000360 | DOI Listing |
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Faculty of Electrical Engineering, Czestochowa University of Technology, 17 Al. Armii Krajowej, Częstochowa, PL-42200, Poland.
We report a complete set of elastic, piezooptic and photoelastic tensor constants of scheelite crystals CaMoO, BaMoO, BaWO and PbWO determined by density functional theory (DFT) calculations using the quantum chemical software package CRYSTAL17. The modulation parameter, i.e.
View Article and Find Full Text PDFMaterials (Basel)
August 2022
West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland.
The spin-Hamiltonian parameters g-factors (g|| and g⟂) of the Ce paramagnetic centers in BaWO: Ce and BaWO: Ce, Na single crystals with axial symmetry are investigated using the superposition model (SPM) via complete diagonalization procedure of energy matrix (CDM method). The calculated g-factors are in reasonable agreement with the experimental values. The fitted intrinsic parameters are comparable with data from other publications for rare-earth paramagnetic centers in a similar environment.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
September 2022
School of Electrical and Computer Engineering, Jilin Jianzhu University, Changchun 130118, China. Electronic address:
Inorganic oxides doped with rear earth(RE) have attracted much interest because of their outstanding optical properties. In this paper, the BaWO:Yb/Er/Nd phosphors were successfully prepared by typical solid state method. The crystalline structure of the samples was characterized through X-ray diffraction(XRD).
View Article and Find Full Text PDFSpectral broadening of 0.3 ps 515 nm laser pulse in a highly Raman-active crystal and fused silica demonstrates significantly different behavior with the incident pulse energy. While the broadening in fused silica is fairly symmetric with respect to the pump laser pulse wavelength, the Stokes wing broadening in the crystal is 2 times wider than that of anti-Stokes wing, the former demonstrating a step-like increase with the pulse energy.
View Article and Find Full Text PDFTransient stimulated Raman scattering (SRS) of 0.3 ps 515 nm laser pulses in ${\rm BaWO_4}$BaWO crystal was experimentally demonstrated with efficiency up to ${\sim}{20}\% $∼20% for the Stokes component with a wavenumber of ${\sim}{925}\;{{\rm cm}^{ - 1}}$∼925cm in a simple single-pass geometry. This anomalous high efficiency was obtained due to the laser pulse self-phase modulation resulting in spectral broadening and seeding the SRS.
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