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ND:YAG Crystal
....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
Due
to the cubic symmetry and high quality, Nd:YAG is easy to
operate with
TEM00 mode
|
Main
Specifications |
Nd
dopant concentration
Dopant tolerance |
0.7---1.3 atm%
within 10% of concentration. |
|
Diameter |
2~ 14mm |
| Length |
1~ 180mm |
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 than10/5
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?/font> |
|
Damage threshold |
over 15J/cm2
(rods without coating )
over 700 MW/cm2 (coating) |
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.
|
Physical
and Chemical Properties |
| Chemical
Formula |
Nd:Y3A15O12 |
| Crystal
Structure |
Cubic
Garnet |
| Lattice
Constants |
12.01?/font> |
|
Concentration |
~ 1.2 x
1020 cm-3 |
| Melting
Point |
1970癈
(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 癈 |
| Thermal
Conductivity |
14 W/m
/K @20 癈, 10.5 W /m /K @100 癈. |
|
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 |
| Pump
Wavelength |
807.5 nm |
| Loss
Coefficient |
0.003 cm-1
@ 1064 nm |
|
Effective Emission Cross Section |
2.8 x 10-19
cm2 |
|
Absorption band at pump wavelength |
1 nm |
|
Linewidth |
0.6 nm |
|
Thermal Birefringence |
High |
|
Polarized Emission |
Unpolarized |
contact cscbbs@126.com
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