Wavelength                       1030 nm   

Chemical Formula              Y3Al5O12:Yb

Melting point                     1970°C

Orientation                        within 5°

Density                             4.56 g/cm3

Parallelism                         ≤ 10"

Perpendicularity                 ≤ 5′

Flatness                            0.1 wave maximum

Surface quality at 5X          20-10

Yb:YAG is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped systems. Compared with the commonly used Nd:YAG crsytal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-laser level lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications. 

Yb:YAG shows great promise as a high power laser material. Several applications are being developed in the field of industrial lasers, such as metal cutting and welding. With high quality Yb:YAG now available, additional fields and applications are being explored.

Advantages of Yb:YAG Crystal 

 •   Very low fractional heating, less than 11%

•   Very high slope efficiency

•   Broad absorption bands, about 8nm@940nm

•   No excited-state absorption or up-conversion

•   Conveniently pumped by reliable InGaAs diodes at 940nm(or 970nm)

•   High thermal conductivity and large mechanical strength

•   High optical quality 

With a wide pump band and excellent emission cross-section Yb:YAG is an ideal crystal for diode pumping.
High Output Power 1.029 1mm
Laser Material for Diode Pumping
Materials Processing, Welding and Cutting

Basic Properties

Chemical Formula

Y3Al5O12:Yb (0.1% to 15% Yb)

Crystal Structure


Output Wavelength

1.029 um

Laser Action

3 Level Laser

Emission Lifetime

951 us

Refractive Index

1.8 @ 632 nm

Absorption Bands

930 nm to 945 nm

Pump Wavelength

940 nm

Absorption band about pump wavelength

10 nm

Melting Point



4.56 g/cm3

Mohs Hardness


Lattice Constants


Thermal Expansion Coefficient

7.8x10-6 /K , [111], 0-250°C

Thermal Conductivity

14 W.s /m /K @ 20°C

Technical Parameters

Product Name



within 5°


3 mm to 10mm

Diameter Tolerance

+0.0 mm/- 0.05 mm


30 mm to 150 mm

Length Tolerance

± 0.75 mm

Perpendicularity of End Faces

5 arc-minutes

Parallelism of End Faces 

10 arc-seconds


0.1 wave maximum

Surface Finish at 5X

20-10 (scratch & dig)

Barrel Finish

400 grit

End Face Bevel

0.075 mm to 0.12 mm at 45° angle


No chips allowed on end face of rod; chip having maximum length of 0.3 mm permitted to lie in the area of bevel and barrel surfaces.

Clear aperture

Central 95%


Standard coating is AR at 1.029 um with R<0.25% each face. Other coatings available.