CY2256 Ytterbium-doped Potassium-Gadolinium Tungstate Crystal (Yb:KGW)

Catalog No. CY2256
Crystal Structure Tetragonal
Perpendicularity <5"
Protective Chamfer <0.1 mm at 45˚
Lattice Constants a=5.16Å; c=10.85Å

Stanford Advanced Materials (SAM) is a trusted supplier of laser crystal with rich experiences. In addition to standard products, we can meet your individual customization requirements. Contact us with your specific requirements or for availability and pricing.

Related Products: Titanium-doped Sapphire Crystal (Ti:Sapphire), Ho:Cr:Tm:YAG, Neodimium-doped Yttrium Aluminum Garnet (Nd:YAG).

Description of Ytterbium-doped Potassium-Gadolinium Tungstate Crystal

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.

Advantages of Yb: KGW:

- The width of the absorption line is wide, and the pump wavelength of the LD pump source with phase matching can be obtained without strict temperature control;
- The quantum defect is low, and the pump wavelength is very close to the laser output wavelength, which will lead to a large intrinsic laser slope efficiency, and the quantum efficiency is up to about 90% theoretically;
- Because the pumped energy level is close to the upper laser level, the thermal load in the material without radiation relaxation is low, which is only one-third of that of the same laser material doped with neodymium;
- No excitation state absorption and upconversion, high light conversion efficiency;
- Long fluorescence life, more than three times that of the same neodymium-doped laser material, is conducive to energy storage;

 

Specifications of Ytterbium-doped Potassium-Gadolinium Tungstate Crystal

Material specifications

Chemical formula

potassium gadolinium tungstate

Crystal structure

monoclinic double tungstates

Density

7.27 g/cm3

Transmission range

0.35-5.5 μm

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

αa=4X10-6 /°C

αb=3.6X10-6 /°C

αc=8.5X10-6 /°C

Melting temperature

1075 °C

Absorption 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

 

Applications of Ytterbium-doped Potassium-Gadolinium Tungstate Crystal

- Nonlinear microscopy
- Oscillators
- Regenerative amplifiers

LATEST RECOMMENDED

CY0486 Nd:YLF (Neodymium-doped Yttrium Lithium Fluoride)

CY0486 Nd:YLF (Neodymium-doped Yttrium Lithium Fluoride)

CY0487 Yb:KGW (Ytterbium-doped Potassium-Gadolinium Tungstate)

CY0487 Yb:KGW (Ytterbium-doped Potassium-Gadolinium Tungstate)

CY0488 Cr:YAG (Chromium-doped Yttrium Aluminum Garnet)

CY0488 Cr:YAG (Chromium-doped Yttrium Aluminum Garnet)

OP1305 Holmium-doped Yttrium Lithium Fluoride (Ho:YLF)

OP1305 Holmium-doped Yttrium Lithium Fluoride (Ho:YLF)

CY2252 Chrome-Doped Zinc Selenide Crystal (Cr:ZnSe)

CY2252 Chrome-Doped Zinc Selenide Crystal (Cr:ZnSe)

CY2253 Thulium-Doped Yttrium Aluminum Garnet Crystal (Tm:YAG)

CY2253 Thulium-Doped Yttrium Aluminum Garnet Crystal (Tm:YAG)

CY2254 Holmium-Doped Yttrium Aluminum Garnet Crystal (Ho:YAG)

CY2254 Holmium-Doped Yttrium Aluminum Garnet Crystal (Ho:YAG)

CY2255 Thulium-Doped Yttrium Lithium Fluoride Crystal (Tm:YLF)

CY2255 Thulium-Doped Yttrium Lithium Fluoride Crystal (Tm:YLF)

GET A QUOTE

Please fill in your details and one of our material experts will get back to you within 24 hours. For more information, contact us via E-mail at sales@samaterials.com.

** Email address with your company's domain name is preferred. Otherwise, we may not be able to process your inquiry.