Yb KGW Crystal Laser Material With Great Potential For High Power Short Pulse Time

Basic Information
Place of Origin: China
Brand Name: CRYLINK
Certification: Iso9001
Model Number: CRYLINK-Yb KGW Laser Crystal
Minimum Order Quantity: 1 Pieces
Price: negotiation
Packaging Details: Carton
Delivery Time: 3-4 weeks
Payment Terms: TT
Supply Ability: 100 pieces /month
Detail Information
Name: Laser Crystal Yb:KGW Chemical Formula: Potassium Gadolinium Tungastate
Crystal Structure: Monoclinic Double Tungstates Density: 7.27 G/cm3
Transmission Range: 0.35-5.5 M Mohs Hardness: 4 To 5
High Light:

nd yag laser rod


laser material

Product Description

Laser Crystal Yb:KGW

Yb3+: KGd(WO4)2 (Yb:KGW) is one of the most promising laser active materials. Yb:KGW crystal is expected to replace Nd:YAG crystal and Yb:YAG crystal in high power diode pumped laser system. Yb:KGW also has great potential for high power, short pulse time femtosecond lasers and their wide application.

Yb3+:KGW has large absorption coefficient, low quantum defect, high absorption and emission cross section

The simple two-level electronic structure of the Yb ion avoids undesired loss processes such as upconversion, excited state absorption, and concentration quenching. Compared to the commonly used Nd:YAG crystal, Yb:KGW crystal has a much larger absorption bandwidth, 3 or 4 times longer emission lifetime in similar hosts with enhanced storage capacity, lower quantum defect and is more suitable for diode pumping than the traditional Nd-doped systems. The smaller Stokes shift reduces heating and increases the laser efficiency. In comparison with other Yb doped laser crystals such as Yb:YAG and Yb:YCOB crystals, Yb:KGW has a much higher (13-17 times) cross-section of absorption, lower quantum defect (~4%), a cross-section of emission that is 9 times higher than Yb: YCOB, and an emission band that is broader than Yb:YAG, a high nonlinear coefficient of refraction, and the highest slope efficiency (87%).


Physical and chemical properties
Chemical formula potassium gadolinium tungastate
Crystal structure monoclinic double tungstates
Density 7.27 g/cm3
Transmission range 0.35-5.5 m
Mohs hardness 4 to 5
Refractive indices at 1060 nm ng = 2.037, np = 1.986, nm=2.033



Optical and thermal properties
Thermal conductivity Ka=2.6 W/mK, Kb=3.8 W/mK, Kc=3.4 W/mK
Thermal optical coefficient @1064 nm dnp/dT=-15.7 * 10-6 K-1
dnm/dT=-11.8 * 10-6 K-1
dng/dT=-17.3 * 10-6 K-1
Thermal expansion a=4X10-6 /°C
b=3.6X10-6 /°C
c=8.5X10-6 /°C
Melting temperature 1075 °C
Absorbtion cross section 1.2X10-19 cm2
Stimulated emission cross section (E| |a) 2.6X10-20 cm2
Laser wavelength 1023-1060 nm
Lasing threshold 35 mW
Stark levels energy (in cm-1) of the 2F5/2 manifolds of Yb3+ @ 77 K 10682, 10471, 10188
Stark levels energy (in cm-1) of the 2F7/2 manifolds of Yb3+ @ 77K 535, 385, 163, 0
optical damage threshold, GW/cm2 20



Spectroscopic Properties

Absorption peak wavelength, lpump, [nm]


Absorption linewidth, Dlpump, [nm]




Contact Details

Phone Number : +8618699681379