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Cr:YAG
Compact Cr4+:YAG Crystals: The Ultimate Passive Q-Switch
Active Q-switching adds unnecessary bulk, complexity, and cost to solid-state lasers. ATR Crystal engineers premium Chromium-doped YAG (Cr4+:YAG) to provide a highly efficient, passive alternative. Functioning as a robust saturable absorber, this crystal radically simplifies laser design, delivering high-peak-power pulses while strictly minimizing system footprint.
- Radical Miniaturization: Eliminates the need for high-voltage electro-optic drivers, drastically reducing overall system size, weight, and manufacturing cost.
- Universal Compatibility: The definitive passive Q-switch for diode and lamp-pumped Nd:YAG, Nd:YLF, and Yb:YAG platforms.
- Optimized Saturation: Precision-tuned for flawless absorption and intense pulsed outputs operating across the critical 1.0 to 1.2 µm wavelength range.
Description
Description
Advantages
1 ) Very high slope efficiency
2 ) Operates well at room temperature
3 ) Operate in a relatively eye-safe wavelength range
Specifications
| Material | Er:YAG |
|---|---|
| Dopant concentration | Er: ~50 at% |
| Orientation | <111> |
| Dimensions | Diameter:2mm-50mm, Length:5mm-180mm(Upon customer’s request) |
| Diameter tolerance | +0/-0.04mm |
| Length tolerance | +0.5/-0mm |
| Chamfer | 0.1mm@45° |
| Extinction Ratio | >25dB(depends on actual size) |
| Flatness | <λ/10@632.8nm |
| Barrel Finish | Ground Finish 400#Grit |
| Surface Quality | 10-5 @MIL-0-13830A |
| Chips | <0.1mm |
| Perpendicularity | <5 arc minutes |
| Parallelism | <10 arc seconds |
| Wavefront Distortion | λ/8 per inch @632.8nm |
| Damage Threshold | >500MW/cm2 |
| Anti-Reflection coating | R<0.20%@2940nm per surface |
Properties
| Chemical Formula | Er3+:Y3Al5O12 |
|---|---|
| Laser Transition | 4I11/2 to 4I13/2 |
| Photon Energy | 6.75×10-20J@2940nm |
| Laser Wavelength | 2940nm |
| Emission Cross Section | 3×10-20 cm2 |
| Index of Refraction | 1.79@2940nm |
| Pump Bands | 600~800nm |
| Moh Hardness | 8.25 |
| Melting Point | 1965℃ |
| Thermal Conductivity | 11.2W/m/K |
| Thermal shock Resistance | 790W/m |