Nd:YLF (Neodymium-Doped Yttrium Lithium Fluoride)
Nd:YLF is a laser crystal characterized by a broad fluorescence linewidth, low thermal lensing effect, and natural polarization properties. It is widely utilized in various fields, including mode-locked lasers, continuous-wave lasers, and material processing.
Positioned as an alternative medium to Nd:YAG, Nd:YLF operates in the near-infrared region and primarily oscillates at 1047 nm and 1053 nm.
It is extensively applied in linearly polarized resonators, mode-locked lasers, semiconductor-pumped Nd:YLF lasers, and Ti:sapphire chirped pulse amplifiers (CPA).
Positioned as an alternative medium to Nd:YAG, Nd:YLF operates in the near-infrared region and primarily oscillates at 1047 nm and 1053 nm.
It is extensively applied in linearly polarized resonators, mode-locked lasers, semiconductor-pumped Nd:YLF lasers, and Ti:sapphire chirped pulse amplifiers (CPA).
Features
- Natural polarization properties
- Broad fluorescence linewidth
- High ultraviolet transparency
- Low thermal lensing effect
- Low excitation threshold for continuous-wave operation
- Suitable for Q-switched/mode-locked operation at medium-to-high repetition frequencies and high average power
- Facilitates single-mode operation, delivering high output power and low beam divergence
Applications
- Mode-locked lasers
- Ultrashort pulse lasers
- Material processing (welding and cutting)
- Ti:sapphire chirped pulse amplifiers (CPA)
- Semiconductor-pumped Nd:YLF lasers
- Continuous-wave/pulse operation systems at 1047 nm and 1053 nm
Physical Specifications
| Property | Specification |
|---|---|
| Crystal Structure | Tetragonal |
| Melting Point | 825 ℃ |
| Mohs Hardness | 5 |
| Density | 3.95 g/cm3 |
| Thermal Conductivity | 0.06 W/cm·K |
| Thermal Expansion Coefficient | [100] direction: 13 × 10-6 /K [001] direction: 8 × 10-6 /K |
| Young's Modulus | 7.5 × 1011 dyn/cm2 |
| Tensile Strength | 3.3 × 108 dyn/cm2 |
Optical Specifications
| Property | Specification |
|---|---|
| Doping Concentration | Nd: ~1.0 at% |
| Crystal Orientation | [100] or [001] (Deviation ≤ 5°) |
| Dimensions | Customizable |
| Dimension Tolerance | Diameter: +0.00 / -0.05 mm Length: ±0.5 mm |
| Processing Method | Precision/Optical Polishing |
| End-face Parallelism | ≤ 10′ |
| End-face Perpendicularity | ≤ 5′ |
| End-face Flatness | ≤ λ/10 @ 632.8 nm |
| Surface Quality | 10-5（MIL-O-13830B） |
| Chamfer | 0.15 ± 0.05 mm |
| Wavefront Distortion | ≤ 0.25λ / 25 mm @ 632.8 nm |
| AR Reflectivity | ≤ 0.25% @ 1047 / 1053 nm |
| Laser Damage Threshold | ≥ 500 MW/cm2 |