Introduction
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.
Very low fractional heating, less than11%
Very high slope efficiency
Broad absorption bands, about mailto:8nm@940nm
No excited-state absorption or up-conversion
Conveniently pumped by reliable InGaAs diodes
at 940nm(or 970nm) High thermal conductivity
High optical quality
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Basic Properties:
Please view Laser crysals physical Properities (dpf format)
The
Sellmeier equations (l in µm for YAG):
n ^2 = 2.08745 + 1.2081 l ^2 /(l^ 2 - 0.02119 )+ 17.2049 l ^2 /(l ^2 - 1404.45 )
Optical and
Spectral Properties
Please view Laser crysals optical and Spectral Properities (dpf format)
Yb:YAG's Specifications:
Orientation: |
<111> or <100]> crystalline
within 5° |
Wavefront distortion : |
l /8 per inch @ 633 nm |
Extinction Ratio: |
>25dB |
Dimension Tolerances |
Rods with diameter: ±0.025 mm ,
Length: ±0.5 mm |
Surface quality: |
10/5 Scratch / Digper MIL-O-1380A
|
Parallelism: |
< 10 arc seconds |
Perpendicularity: |
< 5 arc minutes |
Flatness: |
< l /10 @ 633 nm |
chamfer: |
<0.1 mm @ 45deg. |
Barrel Finish: |
50-80 micro-inch (RMS) , |
AR Coating Reflectivity |
< 0.25% |
Note: The other specification and dimension is available
too |