Yb:YAG

  • Update:Jun 13, 2017
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Yb:YAG Ytterbium doped Yttrium Aluminum Garnet (Yb:Y3Al5O12or Yb:YAG) is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped crystals.

Product Introduction

Ytterbium doped Yttrium Aluminum Garnet (Yb:Y3Al5O12or 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 10-6x °K-1, <111>, 0 - 250 °C  7.7×10-6/ ℃ , <110> (0~250 ℃ )  8.2×10-6/ ℃ , <100> (0~250 ℃ )
Thermal conductivity at 25°C 0.14 W x cm-1x °K-1
Loss coefficient at 1064 nm 0.003 cm-1

Laser Properties

Laser Transition 2F5/2→2F7/2
Laser Wavelength 1030nm
Photon Energy 1.93×10-19J(@1030nm)
Emission Linewidth 9nm
Emission Cross Section 2.0×10-20cm2
Fluorescence Lifetime 1.2 ms
  Spectral Properties
Diode Pump Band 940nm or 970nm
Thermal Optical Coefficient 7.3×10-6/ ℃
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)  

 

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