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 |
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