Barium and Strontium Tungstate-Molybdate Crystals for wavelength conversion using Raman shift

16 Jun 2016

EKSMA Optics can now offer nominally pure and neodymium doped Barium tungstate, Strontium tungstate and Strontium molybdate single crystals:

• Ba(MoO₄)_x(WO₄)_1-x, 0<x<0.01
• Sr(MoO₄)_x(WO₄)_1-x, 0<x<0.01
• Sr(MoO₄)_x(WO₄)_1-x, 0.99<x<1

New Barium and Strontium tungstate-molybdate single crystals feature higher Raman gain as compared to KGW or CaCO₃ and relatively higher thermal conductivity as compared to a Ba(NO₃)₂.

Barium and Strontium tungstate-molybdate single crystals are grown and provided with cut along a-direction. Active elements do not require precise positioning since stimulated Raman scattering (SRS) threshold slightly depends on the crystal orientation relative to pump polarization (within a few percent) and minimum threshold is reached at E||c. In this case, the polarization of the pump and stokes pulses are parallel to the optical axis (c-axis).

Applications:

• Raman converters - new crystals extend the capabilities of the Raman devices in addition to commercially available Ba(NO₃)₂, CaCO₃, KGW crystals, since new crystals have different values of the Stokes shift and allow to obtain a laser radiation at the other wavelengths
• Raman lasers including self-Raman generation
• Laser pulse compressors based on stimulated Raman scattering effect

The crystals are water-insoluble and durable. Available sizes and shapes of active elements are rectangular up to 10 x 10 x 100 mm or with cylindrical cross-section up to dia 10 x 100 mm.

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