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KGW Crystals for Stimulated Raman Scattering
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KGW Crystals for Stimulated Raman Scattering SKU: KGW-0324-25

Eksma Optics offers crystalline materials - Barium Nitrate - Ba(NO3)2 and undoped potassium gadolinium tungstate KGd(WO4)2 or KGW which have attracted much interest as most suitable crystals for stimulated Raman scattering (SRS). These materials can be used for frequency…

Variant specifications

Specification Value
Description KGW crystal, undoped, b-cut
Dimensions 5x5x50 mm
Coating Uncoated

Shared product specifications

These specifications apply across the KGW Crystals for Stimulated Raman Scattering product family.

KGW Physical and Optical Properties

Crystal symmetry Monoclinic, C2 / c
Transmission range 0.35-5.5 µm
Density 7.27 g / cm³
Hardness Mohs 4-5
Refractive indices @ 1064 nm ng= 2.061; np = 1.982; nm = 2.010
Raman shift 901 cm⁻¹ (p[mm]p) / 768 cm⁻¹ (p[gg]p)
Raman gain, pump 1064 nm 3.3 cm / GW (901 cm⁻¹) / 4.4 cm / GW (768 cm⁻¹)
Thermal conductivity, W / mK Ka = 2.6; Kb = 3.8; Kc = 3.4
Thermo-optic coefficients @ 1064 nm dnp / dT=-15.7 x 10⁻⁶ K⁻¹ / dnm / dT=-11.8 x 10⁻⁶ K⁻¹ / dng / dT=-17.3 x 10⁻⁶ K⁻¹
Optical Damage threshold > 10 GW / cm²

Stokes generation wavelengths in KGW crystal with oscillation coefficient 901.5 cm⁻¹ and Ba(NO₃)₂ crystal are given in the table below.

Stokes KGW pumped at KGW pumped at Ba(NO₃)₂ pumped at Ba(NO₃)₂ pumped at Efficiency, / %
532 nm 1064 nm 532 nm 1064 nm
1 Stoke 558 1177 563 1197 35-70
2 Stoke 588 1316 598 1369 20-40
3 Stoke 621 1494 638 1599 10-15
4 Stoke 658 1726 684 1924 < 10
1 Antistoke 507 970 503 957 10-30
STANDARD SPECIFICATIONS Ba(NO₃)₂ KGW
Surface quality 40 / 20 scr / dig 10 / 5 scr / dig
Flatness λ / 4 @ 633 nm λ / 8 @ 633 nm
Maximum elements dimensions 10x10x100 mm 10x10x80 mm

Product brochures

Shared documentation for the complete product family.

PDF
EKSMA_Optics_KGW-BaNO32_Crystal.pdf PDF · 115 KB