| Nd:YAG (Neodimium Doped Yttrium Aluminum Garnet)
has been years the most widely used laser medium for solid-state
laser applications. Nd:YAG crystals are used in all types
of solid-state laser systems, such as frequency-doubled
continuous wave lasers, high-energy Q-switched lasers, and
so on. Compared with others laser crystals, its fluorescence
lifetime is twice more than Nd:YVO4, and thermal conductivity
is also better than that of the latter |
|
Features:
• High gain, low threshold, high efficiency
• Low loss at 1.06¦Ìm, 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:
| Chemical Formula: |
Y3Al5O12 |
| Crystal Structure: |
Cubic |
| Lattice Constant: |
12.01Å |
| Melting Point: |
1970 ¡ãC |
| Density: |
4.5g/cm3 |
| Reflective Index: |
1.82 |
| Thermal Expansion Coefficient: |
7.8x10-6/K
<111> |
| Thermal Conductivity (W/m/K): |
14W/m/K, 20 ¡ãC 10.5W/m/K,
100 ¡ãC |
| Mohs Hardness: |
8.5 |
| 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 |
| Line |
0.6 nm |
| Pump Wavelength |
807.5nm |
| Polarized Emission |
Unpolarized |
| Thermal Birefringence |
High |
| Absorption band at pump wavelength |
1nm |
| Loss Coefficient: |
0.003 cm-1 @ 1064nm
|
Main Applications:
• Nd:YAG can produce blue laser light 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 obtainiing high power green laser
light with SHG@1064nm
Specifications:
| Doping (atm%): |
0.9%~ 1.1%
|
| Orientation: |
<111> >crystalline
direction ¡À30arc minute |
| Wavefront Distortion: |
¦Ë/8 per inch @ 633 nm
|
| Extinction Ratio: |
>28dB |
| Dimension Tolerances |
Rods with diameter:
¡À0.025 mm , Length: ¡À0.5 mm |
| Surface Quality: |
10/5 Scratch / Dig
(MIL-O-1380A) |
| Parallelism: |
<10 arc seconds
|
| Perpendicularity: |
5 arc minutes |
| Clear Aperture: |
> 90% Central Area |
| Flatness: |
¦Ë/10 |
| Chamfer: |
0.1mm@45¡ã |
| Barrel Finish: |
50-80 micro-inch (RMS) |
| Anti-Reflection Coating: |
R < 0.20% @ 1064 nm
per surface. Damage threshold over 1GW/cm2@ 1064nm,
10 ns and 10 Hz |
| High-Reflection Coating: |
Standard HR coating
with R>99.8% @ 1064nm and R<5% @ 808nm |
Note: Other specifications and dimensions
are available upon customer's request.
Commonly Used Doping Concentration and Rod Sizes:
| Doping
|
Dimension
|
Coating
|
1% |
¦Õ3 x 50mm |
AR/AR@1064nm |
| 1% |
¦Õ4 x 40mm |
AR/AR@1064nm |
1% |
¦Õ6 x 60mm |
AR/AR@1064nm |
| 1% |
¦Õ6 x 80mm |
AR/AR@1064nm |
| 1% |
¦Õ6 x 100mm |
AR/AR@1064nm |
| >1% |
¦Õ6 x 120mm |
AR/AR@1064nm |
1% |
¦Õ8 x 120mm |
AR/AR@1064nm |
| 1% |
¦Õ8 x 135mm |
AR/AR@1064nm |
Note: Other doping concentrations and rod dimensions
are available upon customer's request.
|
