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Ytterbium - Doped : Yttrium Aluminium Garnet Laser Crystals
Yb:YAG


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.

Yb:YAG's advantage is a wide pump band and an excellent emission cross section. It is ideal for diode pumping. The broad absorption band enables Yb:YAG to maintain uninterrupted pump efficiency across the typical thermal shift of diode output. High efficiency means a relatively small dimension Yb:YAG laser crystal will produce high power output. Based on the YAG host crystal, Yb:YAG can be quickly integrated into the laser design process. This combination of properties enables straightforward elegant laser designs, and allows high powered lasers to be manufactured more easily ; Yb:YAG. Laser designers can apply their depth of experience.

We offer excellent quality Yb:YAG laser crystals as both rods and discs that meet your exact specifications. Our experienced staff, can work with you to bring out the superior performance of your high power 1 micron output laser system.

Applications

Optical and Laser Properties

Laser Action
3 Level Laser
Emission Cross-section
Σ = 2.1 x 10-20 cm2 (± 10%)
Emission Lifetime
951 µsec
Refractive Index
1.8 at 632 nm
Absorption Bands
930 nm to 945 nm
Chemical Formula
Y3Al5O12:Yb (0.1% to 15% Yb)
Output Wavelength
1.029 µm


Yb:YAG Laser Rod Standard Fabrication Specifications

Feature
Standard
Special Order
Crystal Orientation
<111> within 5°
Available
Diameter
3 mm to 10 mm
Available
Diameter Tolerance
+0.0 mm/- 0.05 mm
Available
Length (plano/plano)
30 mm to 150 mm
Available
Length Tolerance
± 0.75 mm
± 0.50 mm
Perpendicularity of End Faces (plano/plano)
5 arc-minutes
2 arc-minutes
Parallelism of End Faces (plano/plano)
10 arc-seconds
Flatness
0.1 wave maximum
0.10 wave maximum
(plano/plano)
over 90% of aperture
over full aperture
Surface Finish at 5X
20-10 (scratch & dig)
10-5 (scratch & dig)
Barrel Finish
400 grit
Polished approx. 80-50
End Face Bevel
0.075 mm to 0.12 mm at 45° angle
Chips 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.
End Configurations plano/plano, plano/wedge, wedge/wedge or Brewster cut. Plano ends can be finished flat, concave or convex
Coatings Standard coating is AR at 1.029 µm with R < 0.25% each face. Other coatings available (to match diode pumping).





































Information reproduced by kind permission of Saint-Gobain Crystals & Detectors. Specificatioin subject to change without notice. ©Vides.Web Roditi International 2004