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Introduction:
Fluoride transparent ceramics possess the characteristics of high transparency, stable optical performance,
excellent chemical stability and superior mechanical properties, and have therefore attracted widespread attention. They are mainly applied in the fabrication of mid-infrared optical devices, infrared sensors and other related fields.
Rare-earth doped fluoride nanopowders are synthesized by the precipitation method, which enables uniform
mixing of doped ions and reduces the content of impurity elements in raw materials. Particle size of the powder
can be effectively controlled by process optimization. Through vacuum hot-press sintering and hundreds of process
experiments, more reasonable sintering temperature and pressing pressure have been explored. High-performance
rare-earth doped fluoride transparent ceramics can be produced in small batches, including CaF₂ transparent ceramics
doped with various rare-earth ions such as Nd, Yb, Pr, Ho and Tm, which can achieve watt-level continuous laser output.
Features：
Stable physical and chemical properties；
Good processing performance；
Wide absorption band；
Application：
Micro pulse diode pumped laser
Pulse laser for ranging and LiDAR
1535nm human eye safety laser
1340/1440nm laser
Technical Parameters
| Parameter | NdY:CaF₂ | Yb:CaF₂ | Er:CaF₂ | Ho:CaF₂ | Pr:CaF₂ |
|---|---|---|---|---|---|
| Chemical Formula | NdY:CaF₂ | Yb:CaF₂ | Er:CaF₂ | Ho:CaF₂ | Pr:CaF₂ |
| Doping Concentration | 0.1–0.8 at% | 1–25 at% | 0.1–10 at% | 0.1–5 at% | 0.1–1 at% |
| Average Particle Size | 0.8–1 μm | 1 μm | 1 μm | 1 μm | 1 μm |
| Pump Wavelength | 790–800 nm | 980 nm | 972 nm | 642 / 1180 / 1940 nm | 443 nm |
| Emission Wavelength | 1064 nm | 1030 nm | 1525 / 2804 nm | 2030 nm | 484 / 590 / 642 nm |
| Fluorescence Lifetime | 482 μs | 2 ms | 4.5 ms | 25 ms | 31 μs |
| Refractive Index | 1.43 @1 μm | 1.43 @1 μm | 1.43 @1 μm | 1.43 @1 μm | 1.43 @1 μm |
| Mohs Hardness | 4 | 4 | 4 | 4 | 4 |
Standard Products & Processing Specifications
| Specification Item | Technical Index |
|---|---|
| Dimension | φ15×4 mm³ or customized size |
| Dimensional Tolerance | ±0.1 mm |
| Parallelism | 30 arcsec |
| Surface Finish | 20-10 |
| Flatness | λ/4 |
| Effective Aperture | 90% |
| Edge Chipping | ＜ 0.1 mm |
| Chamfer | ＜ 0.1 mm × 45° |
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