Er:YAP
Er:YAP has a large emission cross section at 3μm, three times that of Er:YAG. Highly doped Er:YAP can emit at 2.73µm, while lightly doped Er:YAP can emit at 1.66µm. Its emission and excitation spectra show a broad emission band in the eye-safe region, with peaks near 1545nm and 1608nm and pump bands compatible with common 800nm and 970nm diode lasers. This makes YAP a candidate crystal for diode-pumped lasers in the eye-safe 1.5μm range. Compared with YAG, yttrium aluminum perovskite (YAP) is a promising host for efficient laser emission because of its higher thermal conductivity (~13.3 W m⁻¹ K⁻¹), good mechanical properties, and lower photon energy. Er:YAP is also one of the most promising laser materials for high-power coherent mid-infrared beams.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Chemical formula | Er:YAlO₃ |
| Crystal Structure | Orthorhombic crystal-Pbnm |
| Molecular mass | 163.884 |
| Outline | Translucent crystalline solid |
| Direction | b axis-Pbnm |
| Melting point | 1870 °C |
| Density | 5.35 g/cm³ |
| Specific heat capacity | 0.557 J/g·K |
| Thermal conductivity | 11.7 W/m·K (a-axis), 10.0 W/m·K (b-axis), 13.3 W/m·K (c-axis) |
| Coefficient of thermal expansion | 2.32 x 10⁻⁶ K⁻¹ (a-axis), 8.08 x 10⁻⁶ K⁻¹ (b-axis), 8.7 x 10⁻⁶ K⁻¹ (c-axis) |
| Exact mass | 163.872 g/mol |
| Monoisotopic mass | 163.872 g/mol |
| Laser Wavelength [Laser transition：⁴S₃/₂→⁴I₉/₂] | 1.66 µm |
| Laser Wavelength [Laser transition：⁴I₁₁/₂→⁴I₁₃/₂] | 2.73 µm |
| Pump band [Laser transition：⁴S₃/₂→⁴I₉/₂] | 0.6-0.8 µm |
| Pump band [Laser transition：⁴I₁₁/₂→⁴I₁₃/₂] | 1.53 µm |
| Refractive Index [Laser transition：⁴S₃/₂→⁴I₉/₂ / @632.8 nm)] | 1.94-1.97 (@ 632.8 nm) |
| Refractive Index [Laser transition：⁴I₁₁/₂→⁴I₁₃/₂ / @632.8 nm)] | 1.94-1.97 (@ 632.8 nm) |
Key Features
Datasheet
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