KGW (Potassium gadolinium tungstate)

Potassium gadolinium tungstate, (KGd(WO4)2, is known as KGW.  Crystalline KGW features good mechanical properties and relatively good thermal conductivity of 2.6 to 3.8 Wcm-1K-1, depending upon orientation. Their internal structure and clarity make them ideal for high-precision laser work.

Their role is crucial in generating specific wavelengths or enhancing laser efficiency through stimulated Raman scattering or direct lasing when doped with ions.

What types of applications use KGW?

Engineered for picosecond regimes, our un-doped KGW crystals deliver exceptional damage thresholds—ideal for scalable high-power applications. KGW crystals are used in applications ranging from spectroscopy and micro-machining to medical diagnostics and telecommunications.

Un-doped KGW crystals excel in high-intensity laser environments where stability and nonlinear performance are critical. Their robust optical properties support efficient optical-to-terahertz frequency conversion, making them ideal for ultrafast spectroscopy, terahertz imaging, and power-scalable Raman systems.

Below is an example where you can see the KGW crystal inside the Raman cavity.

Figure 1. Resonator setup for the diode-end-pumped Nd:GdVO4/KGW Raman laser at 1525 nm in the CW operation. Source: MDPI and ACS Style

Why buy KGW crystals?

Listed below are the benefits of GAMDAN Optics, Inc. KGW crystals

• Broad transparency range - from 350 nm to 5 μm

• High Damage Threshold- Can withstand intense laser pulses without degradation

• Two pump polarization- dependent Raman shifts at 768 cm-1 and 901 cm-1

• Excellent Raman shifter- for picosecond applications

• Relatively high thermal conductivity- helps dissipate heat and reduces the chance of laser damage.

• Mechanical Stability- KGW can withstand high optical energies and powers, ideal for performing under high-power conditions.

• Custom Growth & Fabrication- Crystal dimensions, orientation, and coatings available upon request from GAMDAN Optics, Inc.

*Please note, we are discussing here un-doped KGW. The information provided here is specific to un-doped, and doped KGW will have different uses and outcomes.

If you’re looking for crystals ——, your search ends right here, at GAMDAN Optics, Inc. We grow and fabricate KGW crystals in-house and provide customers with ——-crystals, on a competitive pricing basis.