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 company used Nd:YAG crystal, 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.
Advantages
● Very low
fractional heating, less than 11%
● Very high
slope deficiency
● Broad
absorption bands, about 8nm@940nm
● No
excited-state absorption or up-conversion
● Conveniently
pumped by reliable in GaAs diodes
● High
thermal conductivity@ 940nm (or 970nm)
● High
optical quality
Laser Rods
● Flat/flat
● Parallel/
anti-parallel wedged
● Brewster angle
● Concave/convex
radii
● Cylinder grooved
Specifications
|
Material
|
Yb:YAG
|
|
Yb-dopant concentration
|
0.5%--25at%
|
|
Orientation
|
or
|
|
Dimensions
|
Diameter:2mm-50mm, Length:5-180mm(Upon customer’s request)
|
|
Clear aperture
|
Central 95%
|
|
Extinction Ratio
|
>30dB (depends on actual size)
|
|
Diameter Tolerance
|
+0/-0.02mm
|
|
Length tolerance
|
+0.5/-0mm
|
|
Flatness
|
<λ/10@632.8nm
|
|
Damage Threshold
|
>700MW/cm2 @10ns 10HZ
|
|
Barrel Finish
|
Ground Finish 400#Grit
|
|
Scratch/Dig
|
10-5@MIL-0-13830A
|
|
Parallelism
|
<10 arc seconds
|
|
Perpendicularity
|
<5 arc minutes
|
|
Wavefront Distortion
|
λ/8 per inch @632.8nm
|
|
Anti-Reflection coating
|
R<0.2%@1030nm per surface
|
Properties
|
Laser transition
|
2F5/2 →2F7/2
|
|
Laser Wavelength
|
1030nm
|
|
Photon Energy
|
1.93*10ˉ19 J@1030nm
|
|
Emission Linewidth
|
9nm
|
|
Fluorescence Lifetime
|
1.2ms
|
|
Diode pump Band
|
940nm or 970nm
|
|
Pump Absorption Band Width
|
8nm
|
|
Index of Refraction
|
1.82@1030nm
|
|
Loss Coefficient
|
0.003 cm-1
|
