Cr4＋:YAG
Cr4＋:YAG Crystal is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Nd:YVO4 or other Nd and Yb doped lasers at wavelength from 0.8 to 1.2 µm. Passive Q-switches or saturable absorbers provide high power laser pulses without electro-optic Q-switches, thereby reducing the package size and eliminating a high voltage power supply. Cr4＋:YAG is more robust than dyes or color centers and is the material of choice for 1 µm Nd lasers.
Advantages:
1. High chemica stability and reliability
2. Being easy to be operated
3. High damage threshold (>500MW/cm2)
4. As high power,solid state and compact passive Q-Switch
5. Long life time and good thermal conductivity
Application: Ophthalmology, Orthopedics, Microsurgery
Format: Rods, Discs and Slabs
Rod sizes: Diameter: 2- 25mm, Length: 30 - 180mm
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
| Orientation | <100>within5°or<110>within5° |
| Initial absorption coefficient | 0.1~8.5cm@1064nm |
| Initial transmittance | 3%~98% |
| Size | Diameter: 3~20mm, H×W:3×3~20×20mm Upon request of customer |
| Barrel finish | Ground finish 400#Gmt |
| Parallelism | ≤ 20" |
| Perpendicularity | ≤ 15 ′ |
| Flatness | < λ/10 |
| Surface Quality | 20/10 (MIL-O-13830A) |
| Wavelength | 950 nm ~ 1100nm |
| AR Coating Reflectivity | ≤ 0.2% (@1064nm) |
| Damage threshold | ≥ 500MW/cm2 10ns 1Hz at 1064nm |
| Dimensional tolerances | Diameter:±0.05mm, length: ± 0.5mm Chamfer: <0.1 mm @ 45º |
| Chemical Formula | Cr4+:Y3Al5O12 |
| Crystal Structure | Cubic |
| Mohs Scale of Mineral Hardness | 8.5 |
| Melting Point | 1970 °C |
| Density, g/cm3 | 4.55 |
| Coefficient of Thermal Conductivity @ 25°C, W x cm-1x °K-1 | 0.14 |
| Coefficient of Thermal Expansion | 8.2 x 10-6/ ℃<100> |
| Young's Modulus | 7.7x
|
| Thermal Shock Resistance | 790 Wm-1 |
Note:
When inquring or ordering Cr4+:YAG crystal, Please specify the size, initial transmission and coatings.
For further information, please contact BJP.
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