掺钕钇铝石榴石(Nd:YAG)

 

掺钕钇铝石榴石(Nd:YAG):Nd:YAG是最早和最著名的激光晶体。由于它的很多基本性能优越, Nd:YAG常被用于近远红外固态激光及其倍频,三倍频应用中。 

Advantages of Nd:YAG crystals

  • High gain
  • Low threshold
  • High efficiency
  • Low loss
  • Suitable for different modes of operation (cw, pulsed , Q-switched,
  • mode locked, doubling of frequency )
  • Suitable for high-average power lasers
  • Good thermal conductivity and thermal shock characteristics
  • Large mechanical strength
  • High optical quality

Capabilities: 

Nd dopant:
0.6 ~ 1.3 atm%
Diameter:
3 ~ 14mm
Length:
1 ~ 160mm

Specifications:

Orientation:
<111> or <100> within 5°
Dimensional Tolerance:
+/-0.1mm
Wavefront Distortion:
<λ/8 at 633nm
Surface Quality:
20/10
Parallelism:
< 10 arc seconds
Perpendicularity:
< 5 arc minutes
Surface Flatness:
<λ/10 at 633nm
Clear Aperture:
Central 95%
Chamfer:
0.15x45°
Coating:
1.AR@1064nm R<0.2%
2.AR@1064nm R< 0.2% & HT@808nm T>95%
3.HR@1064nm R>99.8% & HT@808nm T>95%
4.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

Properties:

Chemical Formula
Nd:Y3A15O12
Crystal Structure
Cubic
Lattice Constants
12.01Ä
Concentration
~ 1.2 x 1020 cm-3
Melting Point
1970 °C
Density
4.56 g/cm3
Mohs Hardness
8.5
Refractive Index
1.82
Thermal Expansion Coefficient
7.8 x 10-6 /K [111], 0 - 250 °C
Thermal Conductivity
14 W/m /K @20 °C, 10.5 W /m /K @100 °C.
Lasing Wavelength
1064 nm
Stimulated Emission Cross Section
2.8x10-19 cm-2
Relaxation Time of Terminal Lasing Level
30 ns
Radiative Lifetime
550 ms
Spontaneous Fluorescence
230 ms
Loss Coefficient
0.003 cm-1 @ 1064 nm
Effective Emission Cross Section
2.8 x 10-19 cm2
Pump Wavelength
807.5 nm
Absorption band at pump wavelength
1 nm
Linewidth
0.6 nm
Polarized Emission
Unpolarized
Thermal Birefringence
High

 

Note: Kinds of sizes, coating are available upon request.


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