Nd:YAG
Nd:YAG crystal is the most early and mature laser material adopted by R&D, medical, industrial customers. It is the ubiquitous presence for near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.
Advantages:
1. High Gain, High Efficiency, Low Threshold
2. High Optical Quality and low Loss at 1064 nm
3. Good Mechanical and Thermal Properties
4. Easy to operate with TEM00 mode (Q-Switch, pulsed, CW)
Application: Materials processing, drilling, cutting, welding, marking, engraving
Format: Rods, Discs and Slabs
Rod sizes: Diameter: 2- 25mm, Length: 30 - 200mm
Disc sizes: Diameter: 2 - 25.4mm, Thickness: >= 1mm
Slab sizes: Length: 60 - 180mm, Width: 6 - 24mm, Thickness: 3 - 4mm
Ends: Plane, Brewster, Concave and Convex
Sides: Ground, Polished and Grooved
| Nd dopant concentration | 0.4~1.2 at % |
| Orientation | <111> within5° |
| Barrel finish | Ground finish 400#Gmt |
| Flatness | <λ/10 @ 632.8 nm |
| Parallelism | ≤10 " |
| Perpendicularity | ≤5 ' |
| Surface Quality | 10/5 (MIL-O-13830A) |
| Optical Quality | Interference fringes ≤ 0.125 /inch Extinction ration Ø3~Ø6.35 ≥ 28db, Ø7~Ø10 ≥ 25dB |
| Size | Rods: Ø (3~10)mm×(30~180)mm (L) Slabs: (3~12)mm×(6~24)mm×(60~180)mm (L) Upon request of customer |
| Dimensional tolerances | Diameter: +0.15 （ ±0.05mm ） Length: ±0.5mm, chamfer: <0.1 mm @ 45º |
| AR-Coating Reflectivity | R≤ 0.2% (@1064nm) |
| HR-Coating Reflectivity | R>99.8%@1064nm and T>95%@808nm |
| Other HR coatings | HR @ 1064/532 nm, HR @ 946nm, HR@1319nm and other wavelengths are also available |
| Damage Threshold | >700MW/cm 2 10ns 1Hz at 1064nm |
Main properties of Nd:YAG crystal:
| Chemical formula | Nd3+:Y3Al5O12 |
| Cubic | |
| Density | 4.56 g/cm3 |
| Melting Point | 1970℃ |
| Specific Heat | 0.59J/g K(at 300K) |
| Mohs Hardness | 8.5 |
| Thermal Expansion Coefficient | 7.8 x 10-6/K [111], 0 -250℃ |
| Thermal Conductivity | 0.14W/m/K@20°C |
| Loss Coefficient | 0.003 cm-1 @1064 nm |
| Laser Wavelength | 1064nm |
| Fluorescence Lifetime | 230μs |
| Emission Cross Section | 7.5 x 10-19cm2 |
| Index of Refraction | 1.8197 |
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