Nd:YLF Crystal (Neodymium-doped Yttrium Lithium Fluoride)
- Dual emission wavelengths: 1047 nm (σ polarization) and 1053 nm (π polarization)
- Naturally polarized output (birefringent crystal)
- Low thermal lensing and low quantum defect
- Longer fluorescence lifetime than Nd:YAG (~480 µs)
- Broad absorption bands suitable for diode pumping (e.g., 792 nm and 797 nm)
- High efficiency and excellent beam quality
- Suitable for high-energy pulsed and mode-locked operations
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Description
Nd:YLF (Neodymium-doped Yttrium Lithium Fluoride, Nd:LiYF₄) is a well-established laser crystal known for its low thermal distortion and high gain efficiency. Operating primarily at 1047 nm and 1053 nm, Nd:YLF is a birefringent crystal with naturally polarized output, making it especially suited for Q-switched and mode-locked laser systems.
Due to its low thermal lensing and wide absorption bandwidth, Nd:YLF is widely used in both flashlamp-pumped and diode-pumped solid-state lasers. It offers superior performance in low-repetition-rate, high-peak-power pulsed laser systems compared to Nd:YAG, making it ideal for applications where beam quality and pulse energy stability are critical.
Key Features
- Dual emission wavelengths: 1047 nm (σ polarization) and 1053 nm (π polarization)
- Naturally polarized output (birefringent crystal)
- Low thermal lensing and low quantum defect
- Longer fluorescence lifetime than Nd:YAG (~480 µs)
- Broad absorption bands suitable for diode pumping (e.g., 792 nm and 797 nm)
- High efficiency and excellent beam quality
- Suitable for high-energy pulsed and mode-locked operations
Applications
- Scientific Research: Ultrafast laser systems, mode-locked lasers, pump sources for Ti:Sapphire and OPOs
- Industrial Lasers: Precision micromachining, material processing with high beam quality
- Medical Lasers: Ophthalmic surgery and aesthetic laser systems
- Military and Aerospace: Rangefinders, target illumination, laser designators
Technical Specifications
| Chemical Formula | Nd:LiYF₄ |
| Crystal Structure | Tetragonal, space group I41/a |
| Lasing Wavelength | 1047 nm (σ) / 1053 nm (π) |
| Pump Wavelengths | 792-797 nm (diode) or flashlamp |
| Fluorescence Lifetime | ~480 μs |
| Refractive Indices | nₐ = 1.448, n𝒸 = 1.470 @ 1053 nm |
| Thermal Conductivity | ~5.8 W/m·K |
| Density | 3.99 g/cm³ |
| Mohs Hardness | ~4.5 |
| Transparency Range | 0.18 – 6.0 μm |
| Orientation | Typically cut along a-axis |
| Surface Quality | 10/5 scratch-dig (laser grade) |
| Typical Sizes | φ3-12 mm; Length: 30-100 mm (customizable) |
Customization Options
Tinsan Materials supplies high-quality Nd:YLF crystals tailored to your application requirements:
- Doping Concentration: Standard 0.5–1.1 at.% Nd³⁺; others available on request
- Crystal Cut Orientation: Standard a-cut (for polarized output)
- Geometry and Dimensions: Diameter from 3 mm to 12 mm; lengths up to 100 mm or more
- Coatings: AR coatings for 797 nm and 1047/1053 nm; custom coatings on request
- End Configuration: Plano-plano or with slight wedge to avoid parasitic lasing
- Dual-End Polished or Brewster-Angle Ends: Optional for oscillator configurations
Technical Support
Our team provides complete support for material selection, cavity design, pump configuration, and coating compatibility. We work closely with system integrators and researchers to provide optimized Nd:YLF crystals for both OEM and experimental setups.
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!
