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Introduction
Nd:YAG(Neodimium Doped Yttrium Aluminum
Garnet) has been widely used laser crystal for solid-state
laser. 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 , etc.. Compared
with others laser crystals, its fluorescence lifetime is
twice more than Nd:YVO4, and thermal conductivity is also
better.
 High Gain, Low Threshold, High Efficiency,
Low Loss at 1.06 mm, High Optical Quality,
Good Mechanical and Thermal Properties
Due to the cubic symmetry and high quality, Nd:YAG
is easy to operate with TEM00 mode
Basic Properties:
Please view Laser crysals physical Properities (dpf format)
The Sellmeier equations (l in µm for YAG):
n ^2 = 2.08745 + 1.2081 l ^2 /(l^ 2 - 0.02119 )+ 17.2049 l ^2 /(l ^2 - 1404.45 )
Optical and Spectral Properties
Please view Laser crysals optical and Spectral Properities (dpf format)
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 at 1064nm
Nd:YAG can be Q-switched with Cr4+YAG directly
Nd:YAG can be used for high power green laser for
SHG@1064nm
Nd:YAG’s Specifications:
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Doping(atm%):
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0.2%~
2.5%
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Orientation:
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<111>
crystalline direction
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Wavefront
distortion:
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l/8
per inch @ 633 nm |
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Extinction
Ratio: |
>28dB
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Dimension
Tolerances |
Dia.: +/-0.025 mm , Length: +/-0.5 mm
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Surface
quality: |
10/5
Scratch / Digper MIL-O-1380A |
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Parallelism:
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<
10 arc seconds |
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Perpendicularity:
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<
5 arc minutes |
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Clear
Aperture:
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>90%
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Flatness:
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<l/10
@ 633 nm
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chamfer:
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<0.1
mm @ 45deg. |
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Barrel
Finish:
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50-80
micro-inch (RMS) , |
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Anti-Reflection
Coating:
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R
< 0.20% @ 1064 nm per surface. Damage threshold
over 1GW/cm2@ 1064nm, 10 ns and 10 HZ.
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High-Reflection
Coating: |
Standard
HR coating with R>99.8% @ 1064nm and R<5%
@ 808nm |
Note: The other specification
and dimension is available too.
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Laser Crystals