Pr: YLF
In Pr: YLF Crystal, the rich energy level structure of Pr + ions can reduce the probability of non-radiative rapidness. Therefore, the pump spectral threshold of Pr: YLF Crystal is low and has a high luminous efficiency. Under LD pump with wavelength of 442nm, Pr: YLF Crystal has five relatively strong absorption peaks, which are 523nm, 604nm, 640nm, 698nm and 720nm respectively. Among them, 570 to 620 nm laser light source has many applications in environmental and medical fields. The laser with 720nm Pr: YLF Crystal doubling frequency into 360nm wavelength through nonlinear Crystal has also made great contribution to the micro manufacturing industry. All these advantages make Pr: YLF Crystal has a very wide range of applications.
Pr: YLF Crystal is suitable for laser emission in visible light region
Pr: YLF Crystal provides a rich laser transition between blue, green, orange and red because its wavelength is in the visible light region. In addition, as a fluoride host, YLF has low non-radiation multi-phonon attenuation and low excited state absorption, thus visible light laser with Pr: YLF Crystal as gain medium can be produced, which is widely used in entertainment industry and environmental lighting engineering.
Parameter
| Orientation | a-cut |
| Parallelism | <10〞 |
| Perpendicularity | <10′ |
| Surface Quality | 10-5 S-D |
| Wavefront Distortion <λ/4 per inch@632.8 nm | <λ/4 per inch@632.8 nm |
| Surface Flatness <λ/8 @632.8 nm | <λ/8 @632.8 nm |
| Clear Aperture >90% | >90% |
| Face Dimensions Tolerance | +0/-0.1 mm |
| 0.1mm@45° | 0.1mm@45° |
| Length Tolerance | ±0.1mm |
| Coatings | R<1%@440-444nm+R<0.6% @500-700nm on both faces |
| Laser Induced Damage Threshold | >5J/cm2@532nm, 10ns |
| Specific mass | 3.95g/cm3 |
| Melting Point | 819°C |
| Thermal Conductivity /(W·m-1·K-1) | 6 |
| Mohs Hardness | 5 |
| Thermal Expansion / 10-6·K-1） | ~16 |
| Structure Symmetry | Tetragonal |
| Typical Doping Level | 1@.% |
| Refractive Index (@1064nm) | no=1.448, ne=1.470 |
| Lifetime of 3P0 Erbium Energy Level( s) | 50 |
| Emission Cross Section (10-20/cm2) | 20 10-20cm² |
| Absorption Peak Wavelength | 444nm |
| Absorption Cross Section at Peak | 8×10-20cm2 |
| Absorption Bandwidth at Peak Wavelength | ～5nm |
| Laser Wavelength | 523nm, 604nm, 640nm, 698nm and 720nm |
0.5% Pr:YLF For 522nm
Size: 3 x 3 x 5 mm;
S1:HR@522 nm/AR@444 nm;
S2:AR@522nm
Pr:YLF crystal case (2) for 522 nm laser
Size: 3×3×5mm;
2-side polishing 3×3 mm;
Coating: S1: HR@522 nm/AR@444 nm
S2: AR @522nm
- High absorption and emission cross section (~ 10-19 cm2)
- Absorption band and emission in the blue spectral region
- Low non-radiation multi-phonon attenuation and low excited state absorption
- The wavelength is in the visible region
- 570nm-620nm lasers are used in astronomy
- 570nm-620nm lasers are used in medicine
- 570nm-620nm lasers are used in the environment
- 570nm-620nm lasers are used in the display field
- 360nm laser is used in micro-manufacturing
