NdYAG Crystal

• High Gain,High Efficiency,low threshold
• High optical homogeneity and low loss at 1064nm
• Good mechanical and thermal properties
• Stable physical properties and humidity


Nd:YAG has been and continues to be the most mature and most widely used crystals for lasers, no matter solid state or lamp pumped, CW or pulsed.It possesses a combination of properties uniquely favorable for laser operations. We have developed the state-of-the-art crystal growing technology to enable the availability of large, high quality crystal

Specifications of Nd-YAG Crystal:

Orientation: <111> or <100> within 5°
Dimensional Tolerance: Diameter +/-0.1mm ,Length+/-0.5mm
Wavefront Distortion: <λ/8 at 633nm per inch
Surface Quality: 20/10
Parallelism: < 10 arc seconds
Perpendicularity: < 5 arc minutes
Surface Flatness: <λ/10 at 633nm
Clear Aperture: Central 95%
Chamfer: 0.15×45°
Coating: 1.AR@1064nm R<0.2%
2.AR@1064nm R< 0.2% & HT@808nm T>95%
3.HR@1064nm R>99.8% & HT@808nm T>95%
4.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

Properties of NdYAG:

Chemical Formula Nd:Y3A15O12
Crystal Structure Cubic
Lattice Constants 12.01Ä
Concentration ~ 1.2 x 1020 cm-3
Melting Point 1970 °C
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 °C
Thermal Conductivity 14 W/m /K @20 °C, 10.5 W /m /K @100 °C.
 Lasing Wavelength 1064 nm
Stimulated Emission Cross Section 2.8×10-19 cm-2
Relaxation Time of Terminal Lasing Level 30 ns
Radiative Lifetime 550 ms
Spontaneous Fluorescence 230 ms
Loss Coefficient 0.003 cm-1 @ 1064 nm
Effective Emission Cross Section 2.8 x 10-19 cm2
Pump Wavelength 807.5 nm
Absorption band at pump wavelength 1 nm
Linewidth 0.6 nm
Polarized Emission Unpolarized
Thermal Birefringence High