Key Features:
- High thermal conductivity
- High Yb³⁺/Er³⁺ energy conversion efficiency
- Low upconversion loss
- Ideal for 1550 nm laser materials
- Eye-safe 1550 nm laser emission
- High sensitivity for Ge and InGaAs photodetectors
Description: Er,Yb₃(BO₃)₄ crystals are characterized by their high thermal conductivity, efficient Yb³⁺ to Er³⁺ energy conversion, and low up conversion losses. These properties make them excellent materials for 1550 nm lasers. Unlike co-doped phosphate glasses, Er,Yb₃(BO₃)₄ crystals can achieve high power and high slope efficiency for continuous 1530 nm laser emission. The eye-safe 1550 nm laser has broad applications, including LiDAR, 3D imaging, target recognition, and atmospheric transmission, with high sensitivity to smoke and fog. Additionally, the Er,Yb:YAB crystals exhibit high sensitivity for room temperature Ge and InGaAs photodetectors, making them versatile for various fields.
Physical Properties:
| Property | Specification |
|---|---|
| Chemical Formula | Er,Yb₃(BO₃)₄ |
| Absorption Peak Wavelength | 976 nm |
| Absorption Cross-Section | 2.7 x 10⁻²⁰ cm² |
| Absorption Bandwidth | 17 nm |
| Emission Wavelengths | 1522, 1531, 1543, 1550, 1602 nm |
| Fluorescence Lifetime | 0.32 ms |
| Emission Cross-Section | 2.5 x 10⁻²⁰ cm² at 1531 nm |
| Refractive Index | nₒ=1.7757, nₑ=1.7015 |
| Density | 3.84 g/cm³ |
| Mohs Hardness | 7.5 |
| Thermal Conductivity | 7.7 (//a), 6 (//c) W·m⁻¹·K⁻¹ |
| dn/dT | 1.4 x 10⁻⁶ (//a), 4.8 x 10⁻⁶ (//c) K⁻¹ |
| Thermal Expansion Coefficient | 2 x 10⁻⁶ (//a), 9.5 x 10⁻⁶ (//c) K⁻¹ |
| Doping Concentration | 0.1-3 at.% [Er], 5-30 at.% [Yb] |
Optical Properties:
| Property | Specification |
|---|---|
| Principal Pump Absorption Wavelengths | 976 nm |
| Emission Wavelengths | 1522, 1531, 1543, 1550, 1602 nm |
| Fluorescence Lifetime | 0.32 ms |
| Refractive Index | nₒ=1.7757, nₑ=1.7015 |
| Absorption Cross-Section | 2.7 x 10⁻²⁰ cm² |
| Emission Cross-Section | 2.5 x 10⁻²⁰ cm² at 1531 nm |
Standard Specifications:
| Property | Specification |
|---|---|
| Orientation | c-cut |
| Diameter Tolerance | +0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Surface Quality | 10/5 Scratch/Dig (MIL-PRF-13830B) |
| Surface Flatness | λ/6 at 632.8 nm over 90% aperture |
| Parallelism | < 10 arc seconds |
| Perpendicularity | < 10 arc minutes |
| Coating | AR@ (R<1%) @940 nm + AR(R<0.25%) @1480-1600 nm |
Other Properties:
- High thermal conductivity and low thermal expansion coefficient ensure stability under high power operations.
Applications:
- LiDAR for distance measurement
- 3D imaging and target recognition
- Optical communication systems
- Eye-safe laser systems
- Medical laser applications
- Remote sensing and environmental monitoring
Processing and Handling:
- Er,Yb:YAB crystals require careful handling to avoid surface damage and contamination.
- Use gloves or finger cots when handling crystals.
- Store in a clean, dry environment with temperature control to prevent thermal shock.
Why Choose Shape Optics:
- We provide high-quality Er,Yb:YAB crystals with precise doping concentrations and excellent optical properties.
- Our crystals undergo stringent quality control to ensure reliability and performance in demanding applications.
Shape Optics Strength and Capabilities:
- Expertise in crystal growth and fabrication techniques.
- Advanced metrology and inspection facilities to ensure superior product quality.
- Customization options available to meet specific requirements.
- Comprehensive support and consultation services to assist in the integration of Er,Yb:YAB crystals into various laser systems.
