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Although Nd:YAG was invented in the Sixties last century, it has been and is still the most commonly used solid-state crystal material. Nd:YAG crystals are wildly used in all types of solid-state lasers systems-frequency-doubled continuous wave, high-energy Q-switched, and so forth.
Its good fluorescent lifetime thermal conductivity and physical strengths makes it suitable for high power lamp pumped laser.
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1) |
Nd Dopant Concentration: |
0.5-1.2 atm % tolerance within 10% of concentration |
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2) |
Diameter: |
3 ~ 14mm |
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3) |
Length: |
1~ 160mm |
Typical Specification and Tolerance:
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1) |
Orientation: |
<111> crystalline direction (+/-0.5℃) |
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2) |
Wavefront Distortion: |
<l/10 at 632.8nm for 3 ~ 7mm
<l/8 per inch at 632.8nm for >=7mm |
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3) |
Surface Quality: |
better than 20/10 Scratch/Dig per MIL-O-1380A |
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4) |
Parallelism: |
< 10 arc seconds |
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5) |
Perpendicularity: |
< 5 arc minutes |
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6) |
Surface Flatness: |
<l/10 at 632.8nm |
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7) |
Clear Aperture: |
Central 90% |
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8) |
Chamfer: |
0.15x45o |
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9) |
Damage Threshold: |
> 15J/cm2(uncoated )
> 700 MW/cm2(coated) |
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10) |
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%; |
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| coating 9-1 |
coating 9-2 |
coating 9-3 |
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Notes:
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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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Physical and Optical Properties |
| Chemical Formula |
Nd:Y3A15O12 |
| Crystal Structure |
Cubic |
| Lattice Constants |
12.01A |
| Concentration |
~ 1.2 x 10^20 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 | |
