Tm:YAG Crystal (Thulium-doped Yttrium Aluminum Garnet)
- Strong emission near 2.0 μm (typically 2010–2020 nm)
- Broad absorption bands around 785–805 nm (diode pump compatible)
- High quantum efficiency via cross-relaxation process
- Eye-safe wavelength region (2 μm)
- Low threshold and high slope efficiency
- Excellent mechanical hardness and thermal conductivity
- Suitable for both CW and pulsed operation
- High beam quality and long fluorescence lifetime
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Description
Tm:YAG (Thulium-doped Yttrium Aluminum Garnet, Tm³⁺:Y₃Al₅O₁₂) is a versatile and efficient laser crystal operating in the eye-safe near-infrared region, typically around 2.0 μm. It is widely used in diode-pumped solid-state lasers and offers advantages such as high slope efficiency, broad absorption bandwidth, and excellent thermal and mechanical properties.
Tm:YAG is ideal for applications requiring high output power, narrow linewidth, and excellent beam quality. Its 2 μm emission is particularly useful for medical lasers, atmospheric sensing, and materials processing, and it is also used as a pump source for mid-infrared lasers like Ho:YAG.
Key Features
- Strong emission near 2.0 μm (typically 2010–2020 nm)
- Broad absorption bands around 785–805 nm (diode pump compatible)
- High quantum efficiency via cross-relaxation process
- Eye-safe wavelength region (2 μm)
- Low threshold and high slope efficiency
- Excellent mechanical hardness and thermal conductivity
- Suitable for both CW and pulsed operation
- High beam quality and long fluorescence lifetime
Applications
- Medical Lasers: Urology, ENT procedures, laser lithotripsy, and soft tissue surgery
- Atmospheric LIDAR: Eye-safe laser transmitters for remote sensing
- Industrial: Precision drilling and cutting of polymers and organic materials
- Pump Source: Efficient pumping of Ho³⁺-doped mid-IR lasers (e.g., Ho:YAG)
- Defense and Security: Eye-safe rangefinding and laser designation
Technical Specifications
| Chemical Formula | Tm:Y₃Al₅O₁₂ |
| Crystal Structure | Cubic, space group Ia3d (Garnet) |
| Emission Wavelength | ~2010 – 2020 nm |
| Pump Wavelengths | ~785 – 805 nm |
| Fluorescence Lifetime | ~800 μs |
| Thermal Conductivity | ~11 W/m·K |
| Refractive Index | ~1.82 @ 2.0 μm |
| Density | 4.56 g/cm³ |
| Mohs Hardness | 8.25 |
| Transparency Range | 0.25 – 5.0 μm |
| Typical Doping Level | 2 – 6 at.% Tm³⁺ |
| Orientation | <111> or <100> |
| Surface Finish | Laser-grade polished (10/5 S/D typical) |
| Typical Sizes | φ3-12 mm; Length: 30-100 mm (customizable) |
Customization Options
Tinsan Materials offers Tm:YAG crystals with tailored specifications to match specific system requirements:
- Doping Levels: Standard 2–6 at.% Tm³⁺; other concentrations on request
- Crystal Geometry: Custom diameters (3–12 mm) and lengths (30–100 mm or more)
- Cut Orientation: <111> or <100> to optimize thermal and optical properties
- End Faces: Plano-plano, wedge, or Brewster angle options
- Coatings: Custom AR coatings for 785 nm pump and 2.0 μm emission
- Mounting Services: Optional heat sink mounting or housing for OEM integration
Technical Support
Tinsan Materials offers comprehensive technical support including:
- Assistance with pump source selection and system integration
- Doping optimization and crystal orientation consulting
- Custom optical coating and polishing advice
- Post-sale application support for OEM and R&D teams
Ordering & Contact Information
We offer flexible MOQ (Minimum Order Quantity), competitive pricing and global shipping. For custom orders or technical inquiries, please contact us for a detailed consultation!
