Cr4+:YAG
Chemical formula: Cr4+:Y3Al5O12; melting point: 1970 °C; density: 4.55 g/cm3; orientation: <111> or <100>±5°; flatness: < λ/10; parallelism: ≤ 30"; perpendicularity: ≤ 5 ′; surface finish: 20/10. Chromium-doped yttrium aluminum garnet (Cr4+:YAG) is an excellent passive Q-switch crystal for Nd:YAG, Nd:YLF, Nd-doped yttrium vanadate, and other Nd- or Yb-doped lasers at 0.8 to 1.2μm. Passive Q-switches or saturable absorbers generate sufficient laser pulses without electro-optic switches, reducing size and eliminating high-voltage supplies. It is an excellent choice for 1um Nd-doped lasers, replacing conventional LiF and dyes in passive Q-switching.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Chemical Formula | Cr4+:Y3Al5O12 |
| Crystal Structure | cubic |
| Mohs Hardness | 8.5 |
| Melting Point | 1970 °C |
| Density | 4.55 g/cm3 |
| Thermal Conductivity [25°C] | 0.14 W x cm-1x °K-1 |
| Coefficient of Thermal Expansion | 7.8 x 10-6/ ℃ |
| Coefficient of Thermal Expansion | 8.2 x 10-6/ ℃ |
| Coefficient of Thermal Expansion | 7.7×10-6/ ℃ |
| Young's Modulus | 3.17 kg/mm2 × 104 kg/mm2 |
| Thermal Shock Resistance | 790 Wm-1 |
| Orientation | ± 5° or ±5° |
| Flatness | < λ/10 |
| Parallelism | ≤ 30" |
| Parallelism | ≤ 5 ′ |
| Surface Finish [MIL-O-13830A] | 20/10 Scratch / Digper MIL-O-13830A |
| Laser Wavelength | 950 nm ～ 1100nm |
| Damage Threshold | ≥ 500MW/cm2 |
| Initial Transmittance | 5% ~ 95% |
| Dimensions - Diameter | 3 ～ 20mm |
| Dimensions - Length×Width | 3 × 3 ～ 20 × 20mm |
| Dimensions | According to customer requirements |
| Dimensional Tolerance - Diameter | +0.00"/-0.05"mm |
| Dimensional Tolerance - Length | ± 0.05" |
| Dimensional Tolerance - Chamfer [45º] | <0.1 mm @ 45º |
| Anti-Reflection Coating [1064nm] | ≤ 0.2% (@1064nm) |
Key Features
Datasheet
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