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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.

 

Physical and Chemical Properties

Chemical formula

Yb3+:Y3Al5O12

Crystal structure

cubic

Lattice Parameters

12.01A

Melting Point

1970 ℃

Density, g/cm3

4.56

Mohs hardness

8.5

Thermal expansion coefficient

7.8 x 10-6 x K-1 , <111>, 0 - 250 C
7.710-6/ ℃ , <110> (0~250 ℃ )
8.210-6/ ℃ , <100> (0~250 ℃ )

Thermal conductivity at 25C

0.14 W x cm-1 x K-1

Loss coefficient at 1064 nm

0.003 cm-1

 

Laser Properties

Laser Transition

2F5/22F7/2

Laser Wavelength

1030nm

Photon Energy

1.9310-19J(@1030nm)

Emission Linewidth

9nm

Emission Cross Section

2.010-20cm2

Fluorescence Lifetime

1.2 ms

 

Spectral Properties

Diode Pump Band

940nm or 970nm

Thermal Optical Coefficient

7.310-6/ ℃

Index of Refraction

1.82

 

Standard Specifications

Dopant concentration, at.%

0.5-30%

orientation:

<111>within 5

Flatness

< λ/10

Parallelism

≤ 10"

Perpendicularity

≤ 5 ′

Surface Quality

10-5(MIL-O-13830A)

Optical Quality:

Interference fringes ≤ 0.125/inch, Extinction ration ≥ 30dB

Size:

Diameter:2 20mm,Length:5 150mm  (Upon request of customer)

Dimensional tolerances 

Diameter:+0.00"/-0.05"mm; Length: 0.02" ; Chamfer: 0.07+0.005/-0.00" at 45

AR Coating Reflectivity 

≤ 0.2% (@1030nm)

 

 Nd:YAG rod       Nd:YVO4       KTA         Er:YAG       (Nd, Ce):YAG      Cr4+:YAG

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