Nd:YAG is the earliest and most famous laser host crystal. Since it combines great advantages in many basic properties, Nd:YAG is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier
| Nd Dopant Concentration | |
| High | 1.1±0.1at% |
| Middle | 0.9±0.1at% |
| Low | 0.7±0.1at% |
| Crystallographic Orientation | |
| [111]within 5 o | |
| Wavefront Distortion | |
| ≤0.125λ/inch | |
| Extinction Ration | |
| Φ3 -Φ6.35mm: ≥28dB | |
| Φ7-Φ10mm: ≥25dB | |
| Φ 11- Φ 13mm: ≥22dB | |
| Φ 14- Φ 15mm: ≥18dB | |
| Dimensional Tolerances | |
| Diameter | ± 0.05mm |
| Length | ± 0.5mm |
| End Surface Finish | |
| Flatness/Sphericity | ≤0.1 wave |
| Scratch-Dig | 10-5 (per MIL-O-13830A) |
| End Configuration | |
| Parallelism | ≤ 10" |
| Perpendicularity | ≤ 5′ |
| Chamfer | |
| Depth: | 0.05±0.03 inch |
| Angle: | 45±5 o |
| Coating | |
| Anti-reflection, R ≤ 0.25%, or other kinds of coatings upon requirement | |
| • Nd:YAG Material Properties | |
| Formula | Nd: Y3AL5O12 |
| Crystal Structure | Cubic |
| Moh Hardness | 8.5 |
| Melting Point | 1970 oC |
| Density | 4.55 g/cm3 |
| Atomic Density | 1.38 x 1020 atoms/cm3 |
| Thermal Conductivity | 0.14Wcm-1K-1 |
| Thermal Expansion | 6.9 x 10-6/ o C-1 (111) |
| Stimulated Emission Cross Section | 2.8x10-19 cm2 |
| dn/dT | 7.3 x 10-6 o C-1 |
| Young's Modulus | 3.17x104 kg/mm-2 |
| Poisson Ratio | 0.25 |
| Lasing Wavelength | 1064nm |
| Index of Refraction | 1.8197 at 1.0 mm |
| Fluorescent Lifetime | 230 ms |
| Pumping Wavelength | 807.5 nm |
| Thermal Shock Resistance | 790 Wm-1 |
