Nd:YAG Crystals
Nd:YAG (Neodymium Doped Yttrium Aluminum Garnet, Nd:Y3Al5O12) 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. Newlight Photonics has developed the state-of-the-art crystal growing technology to enable the availability of large and high quality crystals.
Nd:YAG crystals with diffusion bonded undoped YAG endcaps are also available from Newlight Photonics. Please visit here.
| Part No. | Size | Doping | Coating | Price | Availability | Add to Cart |
Newlight's Nd:YAG crystal features,
 High gain, low threshold, high efficiency |
| Low loss at 1064 nm, high optical quality |
| Excellent mechanical and thermal properties |
Basic Properties:
| Crystal Structure | Cubic |
| Lattice Constant | 12.01 Å |
| Melting Point | 1970 oC |
| Density | 4.56 g/cm3 |
| Refractive Index | 1.82 @ 1064 nm |
| Thermal Expansion Coefficient | 7.8x10-6 /K along <111> 8.2x10-6 /K along <100> |
| Thermal Conductivity | 14 W/m/K, 20 ºC 10.5 W/m/K, 100 ºC |
| Mohs Hardness | 8.5 |
Optical Properties:
| Stimulated Emission Cross Section | 2.8x10-19 cm2 |
| Spontaneous Fluorescence Lifetime | 230 µs |
| Linewidth | 0.6 nm@1064 nm |
| Pump Wavelength ( With Laser Diodes) | 807.5 nm |
| Absorption Bandwidth | 1 nm |
| Polarized Emission | Unpolarized |
| Thermo-Optic Coefficient (dn/dT) | 7.3x10-6 /K |
| Thermal Birefringence | High |
| Loss Coefficient | ~ 0.002 cm-1 @ 1064 nm |
Application examples:
| Very high power lasers up to KW @ 1064 nm |
| Blue lasers with the frequency doubling of 946 nm |
| Compact passively Q-switched Nd:YAG lasers with Cr4+:YAG |
| High power green laser from SHG @ 1064 nm |
Specifications of Nd:YAG products:
| Doping: | 0.1% ~ 1.5% (Atomic Pencentage, atm%) |
| Orientation: | axis along <111> or <100> direction |
| Wavefront Distortion: | < λ/4 per inch @ 632.8 nm |
| Extinction Ratio: | > 30 dB |
| Dimension Tolerances | Diameter +0.0/-0.05 mm , Length ±0.5 mm |
| Surface Quality: | 10/5 Scratch/Dig as per MIL-O-1380A |
| Parallelism: | < 10 arc seconds |
| Perpendicularity: | < 3 arc minutes |
| Clear Aperture: | > 90% |
| Surface Flatness: | < λ/10 @ 632.8 nm |
| Chamfer: | < 0.1 mm @ 45o |
Standard Anti-Reflection (AR) Coating:
R < 0.20% @ 1064 nm per surface with the damage threshold > 1GW/cm2 @ 1064 nm,
10 ns and 10 Hz.
Typical AR coating curve @ 1064 nm:
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