Er:YLF
Er:YLF, also called erbium-doped lithium yttrium fluoride, is a crystal with excellent overall performance. It is widely used in industry, medicine, and scientific research. It offers a low nonlinear refractive index, low phonon frequency, and a long-lived laser-emitting energy level. Applications include 2940nm erbium lasers, 3μm laser Q-switches, upconversion visible lasers, and laser ranging.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Orientation | A-cut |
| Parallelism | <10〞 |
| Perpendicularity | <10ˊ |
| Surface Quality | 10-5 S-D |
| Wavefront distortion [@632.8 nm] | <λ/4 per inch@632.8 nm |
| Flatness [@632.8 nm] | <λ/10 @632.8 nm |
| Clear Aperture Dimension | >90% |
| Face dimension tolerance | +0.0/-0.1 mm |
| Length Tolerance | ±0.1mm |
| Chamfer [@45°] | <0.1mm@45° |
| Structural symmetry | Tetragonal |
| Lattice constant [@1.5%] | a=5.173, c=10.747 Å@1.5% |
| Density | 3.95g/cm³ |
| Melting point | 819°C |
| Thermal conductivity | ～5 |
| Specific heat | 0.79 J·g⁻¹·K⁻¹ |
| Thermal expansion | 8 10⁻⁶·K⁻¹ |
| Hardness [@Mohs] | 5 kg/mm² |
| cm²) | 7.65 |
| Typical doping level | 15% |
| Refractive Index [@2070nm] | n₀=1.442, nₑ=1.464 |
| Thermo-optic coefficient | -2(∥a), -4.1(∥c) |
| Lifetime of the erbium ⁴I₁₁/₂ level | 4 ms |
| cm²) [@2800nm] | 1.5@2800nm |
| Absorption peak wavelength | 972nm |
| Absorption coefficient at peak wavelength | 28cm⁻¹ |
| Absorption bandwidth at peak wavelength | ～1nm |
| Laser Wavelength | 2810nm |
Key Features
Datasheet
Supplier Information
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