Nd:Ce:YAG Laser Crystal
The doubly doped Nd:Ce:YAG crystal has cerium added as a sensitizer for Nd3+ ions due to its high absorption rate in the ultraviolet wavelength band and efficient energy transfer to the Nd3+ excited state when excited by a flash lamp.
Therefore, the thermal distortion of the Nd:Ce:YAG crystal is quite small, and the energy of the output laser is larger than the thermal distortion of the Nd:YAG crystal excited under the same conditions.
Thus, it becomes possible to achieve high-power lasers with good beam quality.
The oscillation wavelength at 1064 nm, the laser damage threshold, and the thermal conductivity of the Nd:Ce:YAG crystal are about the same as those of the Nd:YAG crystal.
Therefore, the thermal distortion of the Nd:Ce:YAG crystal is quite small, and the energy of the output laser is larger than the thermal distortion of the Nd:YAG crystal excited under the same conditions.
Thus, it becomes possible to achieve high-power lasers with good beam quality.
The oscillation wavelength at 1064 nm, the laser damage threshold, and the thermal conductivity of the Nd:Ce:YAG crystal are about the same as those of the Nd:YAG crystal.
Features
- High efficiency
- Low threshold
- Excellent UV absorption rate
- Excellent thermal stability
- High quality
Applications
- Medical: Use in laser treatments and surgeries (e.g., ophthalmic surgery).
- Processing: Material processing, laser welding, cutting.
- Research: Analysis of materials, laser spectroscopy, etc.
Optical and Spectral Properties of Nd:Ce:YAG Crystal
| Laser Transition | 4F3/2 → 4I11/2 |
|---|---|
| Laser Wavelength | 1.064 µm |
| Photon Energy | 1.86 × 10-19J@1.064 µm |
| Emission Linewidth | 4.5 Å @1.064 µm |
| Emission Cross Section (Nd1at%) | 2.7～8.8 × 10-19cm-2 |
| Fluorescence Lifetime (Nd1at%) | 230 µs |
| Index of Refraction | 1.8197@1064 nm |
Specifications of Nd:Ce:YAG crystal from CHEMI
| Dopant Concentration | Nd:1.1～1.4 at%, Ce:0.05～0.1 at% |
|---|---|
| Wavefront Distortion | ≤0.2 λ/inch |
| Extinction Ratio | ≥28 dB |
| Rod Sizes | Diameter:3～6 mm, Length:40～80 mm Upon request of customer |
| Dimensional Tolerances | Diameter +0.000"/-0.002", Length ±0.02" |
| Barrel Finish | Ground Finish: 400# Grit |
| Parallelism | ≤10" |
| Perpendicularity | ≤5′ |
| Flatness | λ/10 |
| Surface Quality | 10 - 5 (MIL-PRF-13830B) |
| Chamfer | 0.006" ± 0.002" at 45° ± 5° |
| AR Coating Reflectivity | ≤0.25% (@1064 nm) |