Overview:
Invented in the sixties of the last century, Nd:YAG 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. Compared with others laser crystals, its fluorescence lifetime is twice more than Nd:YVO4 , and thermal conductivity is also better.
General Specifications Of Nd:YAG:
Nd Dopant Level |
0.5-1.1atm% |
Orientation |
<111>crystalline direction (±0.5deg) |
Dimension Tolerances |
Diameter: ±0.05mm |
Length: ±0.5mm |
Surface Quality |
10/5 Scratch and Dig |
Clear Aperture |
>90% |
Surface Flatness |
<λ/10@633nm |
Wavefront Distortion |
<λ/8@633nm |
Parallelism |
<10 arc seconds |
Perpendicularity |
<5 arc minutes |
Chamfer |
<0.1mmx45° |
AR Coating |
Reflectivity R<0.25%@1064 nm per surface
Damage threshold over 750 MW/cm2@1064nm, 10 ns and 10 Hz |
HR Coating |
Standard R>99.8%@1064nm and R<5%@808nm, Other coatings are available per your request |
Extinction Ratio |
Rods with diameter from 3 mm to 6.35 mm and with length to 100 mm: >30dB
Rods with diameter from 7 mm to 10 mm and with length to 100 mm: >28dB |
Standard Products of Nd:YAG:
PN: |
Doping
(%)
|
Diameter
(mm)
|
Length
(mm)
|
End Wedge
(Deg)
|
AR Coating |
NYG-1-7120-1064 |
1 |
7 |
120 |
0/0 |
AR/AR@1064
|
NYG-1-7145-1064 |
1 |
7 |
145 |
0/0 |
AR/AR@1064 |
NYG-1-7155-1064 |
1 |
7 |
155 |
0/0 |
AR/AR@1064 |
NYG-1-7165-1064 |
1 |
7 |
165 |
0/0 |
AR/AR@1064 |
NYG-1-7185-1064 |
1 |
7 |
185 |
0/0 |
AR/AR@1064 |
NYG-1-8100-1064 |
1 |
8 |
100 |
0/0 |
AR/AR@1064 |
NYG-1-8145-1064 |
1 |
8 |
145 |
0/0 |
AR/AR@1064 |
NYG-1-8155-1064 |
1 |
8 |
155 |
0/0 |
AR/AR@1064 |
NYG-1-8165-1064 |
1 |
8 |
165 |
0/0 |
AR/AR@1064 |
NYG-1-8185-1064 |
1 |
8 |
185 |
0/0 |
AR/AR@1064 |
Physical Properties of Nd:YAG:
Chemical Formula |
Nd:Y3Al5O12 |
Crystal Structure |
Cubic |
Lattice Constants |
12.01 |
Concentration |
~1.2 x 1020 cm-3 |
Melting Point |
1970℃ |
Density |
4.56 g/cm3 |
Mohs Hardness |
8.5 |
Refractive Index |
1.82 |
Thermal Conductivity |
14 W/m /K @20℃, 10.5 W /m /K @100℃ |
Thermal Expansion Coefficient |
7.8 x 10-6/K [111], 0-250℃ |
Optical Properties of Nd:YAG:
Pump Wavelength |
807.5nm |
Lasing Wavelengths |
1064nm |
Photon Energy |
1.86x10-19J@1064nm |
Stimulated Emission Cross-Section |
2.8x10-19 cm2 |
Radiative Lifetime |
550us |
Spontaneous Fluorescence |
230us |
Loss Coefficient |
0.003cm-1@ 1064nm |
Absorption band at pump wavelength |
1nm |
Linewidth |
0.6nm |
Polarized Emission |
Unpolarized |
Thermal Birefringence |
High |
|