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Invented in the sixties of the last century, Nd:YAG(Neodimium Doped
Yttrium Aluminum Garnet) has been and continue
to be the
most widely used laser crystal for solid-state crystal material. Its laser parameters
are a good compromise between the strengths and weaknesses of its
competition. Nd:YAG crystals are used in all types of solid-state
lasers systems-frequency-doubled continuous wave, high-energy Q-switched,
and so forth. Compared with
others laser crystals, its fluorescence lifetime is twice more than
Nd:YVO4, and thermal conductivity is also better. Red Optronics supplies quality Nd:YAG rods with high optical homogeneity,
consistent performance, and high processing accuracy.
Applications:
-
Nd:YAG can produce blue laser with the frequency-doubling of
946nm
-
Nd:YAG can be operated in a very high power laser up
to kw level
-
Nd:YAG can be Q-switched with Cr4+YAG directly
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Due to the cubic symmetry and high quality, Nd:YAG is easy to operate with
TEM00 mode
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Main Specifications
|
|
Nd dopant
concentration
Dopant tolerance |
0.7---1.3 atm%
within 10% of concentration. |
| Diameter |
3 ~ 14mm |
| Length |
1~
160mm |
Anti-reflection
Coating
High transmission Coating
High
reflection Coating |
R<0.1 @
1064nm
T>95%
@ 808nm
R>99.8% @
1064nm |
| Orientation |
<111> crystalline
direction (+/-5℃) |
| Wavefront
Distortion |
<λ/10
per inch at 632.8nm for 3 ~7mm
>λ/10 per inch at 632.8nm for
>=7mm |
| Surface
quality |
better
than 20/10 Scratch/Dig per MIL-O-1380A |
| Parallelism |
< 10
arc seconds |
| Perpendicularity |
< 5 arc
minutes |
| Surface
flatness |
<λ/10
at 632.8nm |
| Clear
aperture |
Central
95% |
| Chamfer |
0.15x45° |
| Damage
threshold |
over
15J/cm2 (rods without coating
)
over 700 MW/cm2
(coating) |
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NOTES:
To inquire or order a finished Nd:YAG laser rod, please provide specifications
as listed in the above. For general application, we only need to know
the main specifications: Nd-dopant concentration, sizes, and coating.
For
special request, please provide specification in details for evaluation
and fabrication.
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Physical and
Chemical Properties
|
|
| Chemical
Formula |
Nd:Y3A15O12 |
| Crystal
Structure |
Cubic Garnet |
| Lattice
Constants |
12.01Å |
| Concentration |
~ 1.2 x
1020 cm-3 |
| Melting
Point |
1970°C (2240K) |
| 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. |
| Physical and
Optical properties |
| 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 |
|
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