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Neodymium, Erbium or Ytterbium doped Yttrium Aluminum Garnets
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Lithium Tetraborate
Neodymium doped Yttrium Aluminum Garnet (Nd:Y3Al5O12 or Nd:YAG) crystal, which continues as the best of the rare earth garnet materials that are characterized by four-level laser operation which permits low threshold pulse and cw operation. It is the most mature and widely used solid-state laser material adopted by R&D, medical, industrial and military customers. Its main and obvious advantages are: high gain, low threshold, high efficiency, low loss at 1.064 µm, as well as high optical quality, good thermal conductivity and thermal shock characteristics, stable chemical and mechanical properties, which make Nd:YAG as the most suitable and commercial laser material for various modes of operation (CW, pulsed, Q-switched, mode locked and cavity dumped).
   Erbium doped Yttrium Aluminum Garnet (Er:Y3Al5O12 or Er:YAG) combines various output wavelength with the superior thermal and optical properties of YAG. It is a well known material for medical applications.
   Ytterbium doped Yttrium Aluminum Garnet (Yb:Y3Al5O12 or Yb:YAG) is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped crystals. It can be pumped at 0.94 µm and generates 1.03 µm laser output. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a larger absorption bandwidth in order to reduce thermal management requirements for diode lasers, a longer upper-state 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, such as, its doubling wavelength is 515 nm, very close to that of Ar-ion laser (514 nm) which makes it possible to replace large volume Ar-ion laser.
MAIN PROPERTIES:
Chemical formula Nd3+:Y3Al5O12 Er3+:Y3Al5O12 Yb3+:Y3Al5O12
Crystal structure cubic cubic cubic
Dopant concentration, at.% 0.7 - 1.1 up to 50 LOW: 6 - 8%, HIGH: 20%
Density, g/cm3 4.56 5,35 4.56
Mohs hardness 8.5 8.5 8.5
Thermal expansion coefficient

7.8 x 10-6 x °K-1, <111>
8.2 x 10-6 x °K-1, <100>

 9,5 x 10-6 K-1 (a axis), 4,3 x 10-6 K-1 (b axis),
10,8 x 10-6 K-1 (c axis)		 7.8 x 10-6 x °K-1, <111>, 0 - 250 °C
Thermal conductivity at 25°C, W x cm-1 x °K-1 0.14 0.12 0.14
Loss coefficient at 1064 nm, cm-1 0.003 0.003 0.003
Refractive index, at 1 µm 1.82 1.837 1.82
Lasing wavelength, nm 1064.0 2940 1030

Rods with round cross-sections are manufactured:
Diameter, mm (4 ÷ 8) ± 0.025
Length, mm up to 130 ± 0.5
Flatness < λ/10
Parallelism, arc sec < 10
Perpendicularity, arc min < 10
Roughness, scratch/dig 10 - 5

We supply rods and slabs with different cross-sections, dimensions and coatings. Different dopants compositions with different concentrations are available for specific customer requirements.

I N Q U I R Y    F O R M :

Material:
Quantity of elements:
Application:
For example: SHG@1064; SFG@800+267->200; DFG@780-842->10600; OPO@355->460÷560+960÷1150; etc.
polished sites:

BLOCK    or  BLOCK
  a-b b-c a-c
or d  
Dopant conc.:
 % ;      Orientation:
Dimensions/Tolerances:
 For example:
10.0 +/- 0.1
Coating:

For example: ARC s1/s2 1064 R<0.25%; ARC s1/s2 1064 R<0.25%+532<0.5%;
BBAR s1/s2 1064 R<1%+3÷10<5% etc.
a = mm;
c = mm		 b = mm or
dia. = mm;
This field is for additional information such as application,
comments, add. requirements etc.
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