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Nd:YAG (Neodymium Doped Yttrium Aluminum Garnet, Nd:Y3Al5O12)
Nd:YAG has been and continues to be the most mature and most widely used crystals for lasers, no matter solid state or lamp pumped, CW or pulsed.It possesses a combination of properties uniquely favorable for laser operations. We have developed the state-of-the-art crystal growing technology to enable the availability of large, high quality crystals. |
Lasertec's Nd:YAG features
 High gain, low threshold, high efficiency |
| Low loss at 1.06 um,high optical quality |
| Good mechanical and thermal properties |
| Easy to operate in TEM00 mode |
Basic Properties
Crystal Structure |
Cubic |
Lattice Constant |
12.01 Å |
Melting Point |
1970 oC |
Density |
4.5 g/cm3 |
Refractive Index: |
1.82 |
Thermal Expansion Coefficient |
7.8x10-6 /Kalong <111> |
Thermal Conductivity |
14 W/m/K, 20C
10.5 W/m/K, 100C |
Mohs Hardness |
8.5 |
Optical Properties
| Stimulated Emission Cross Section |
2.8x10-19 cm2 |
| Relaxation Time of Terminal Lasing Level |
30 ns |
| Radiative Lifetime |
550 us |
| Spontaneous Fluorescence Lifetime |
230 us |
| Linewidth |
0.6 nm |
| Pump Wavelength |
807.5nm |
| Absorption Bandwidth |
1nm |
| Polarized Emission |
Unpolarized |
| Thermal Birefringence |
High |
| Loss Coefficient: |
0.003 cm-1 @1064nm |
Application examples
| Very high power laser up to KW level at 1064nm |
| Blue laser with the frequency-doubling of 946nm |
| Nd:YAG can be passively Q-switched with Cr4+:YAG directly |
| High power green laser from SHG@1064nm |
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1) |
Nd Dopant Concentration: |
0.5-1.2 atm%tolerance within 10% of concentration |
2) |
Diameter: |
3 ~ 14mm |
3) |
Length: |
1~ 160mm |
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Typical Specification and Tolerance:
1) |
Orientation: |
<111> crystalline direction (+/-0.5) |
2) |
Wavefront Distortion: |
<l/10 at 632.8nm for 3 ~ 7mm
<l/8 per inch at 632.8nm for >=7mm |
3) |
Surface Quality: |
better than 10/5 Scratch/Dig per MIL-O-1380A |
4) |
Parallelism: |
< 10 arc seconds |
5) |
Perpendicularity: |
< 5 arc minutes |
6) |
Surface Flatness: |
<l/10 at 632.8nm |
7) |
Clear Aperture: |
Central 90% |
8) |
Chamfer: |
0.15x45 |
| 9) |
Extinction Ratio: |
>28dB |
10) |
Damage Threshold: |
> 15J/cm2(uncoated )
> 1000 MW/cm2(coated) |
11) |
Coatings: |
a)AR@1064nm, R<0.1%;
b)AR@1064nm, R< 0.1%;HT@808nm, T>95%;
c)HR@1064nm, R>99.8%; HT@808nm, T>95%;
d)HR@1064nm, R>99.8%; HT@808nm, T>95%; HR@532nm, R>99%; |
Part No. |
Doping |
Dimension |
Coating |
NdYAG0305 |
1.1% |
dia3X50mm |
AR/AR@1064nm |
NdYAG0404 |
1.1% |
dia4X40mm |
AR/AR@1064nm |
NdYAG0606 |
1.1% |
dia6X60mm |
AR/AR@1064nm |
NdYAG0608 |
1.1% |
dia6X80mm |
AR/AR@1064nm |
NdYAG0610 |
1.1% |
dia6X100mm |
AR/AR@1064nm |
NdYAG0612 |
1.1% |
dia6X120mm |
AR/AR@1064nm |
NdYAG0812 |
1.1% |
dia8X120mm |
AR/AR@1064nm |
NdYAG0813 |
1.1% |
dia8X135mm |
AR/AR@1064nm |
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AR@1064nm |
HR@1064nm |
HR@104&532nm |
Notes: |
To inquiry or order a finished Nd:YAG laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Nd-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication. |
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