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| Categories | Laser Crystals | 
|---|---|
| Place of Origin: | China | 
| Brand Name: | CRYLINK | 
| Certification: | Iso9001 | 
| MOQ: | 1 Pieces | 
| Price: | negotiation | 
| Packaging Details: | Carton | 
| Delivery Time: | 3-4 weeks | 
| Payment Terms: | TT | 
| Supply Ability: | 100 pieces /month | 
| Model Number: | CRYLINK-Yb CaF2 Laser Crystal | 
| Name: | Yb CaF2 Laser Crystals | 
| Crystal structure: | cubic | 
| Lattice parameters,: | 5.462 | 
| Orientation: | [111] or [100] < ±0.5° | 
| Mass density: | 3.18 g/cm3 | 
| Mohs hardness: | 4 | 
Due to the toughness and the flexible and cheap production process, CaF2 has been used in many substrate materials for laser crystals. As an amplifying ion, Yb3+ also allows a three-level laser scheme, leading to low quantum defects and a significantly longer fluorescence lifetime. Yb3+:CaF2 can also provide a high optical efficiency and high output powers due to the reduced thermal load. Recently, ytterbium-doped alkaline-earth fluoride is mostly used in diode-pumped femtosecond laser and amplifiers. Alkaline-earth fluorides which can be easily grown by using the standard Czochralski or Bridgman technique show a great potential in the wide transmission range, high damage threshold and low dispersion behavior.
Features
Applications
Chemical and physical properties
| Property | Value | 
| Chemical formula | Yb3+:CaF2 | 
| Crystal structure | cubic | 
| Lattice parameters, | 5.462 | 
| Orientation | [111] or [100] < ±0.5° | 
| Mass density | 3.18 g/cm3 | 
| Mohs hardness | 4 | 
| Young's modulus | 146 GPa | 
| Tensile strength | 2 GPa | 
| Melting point | 1418°C | 
| Thermal conductivity | 9.71 | 
| Specific Heat/ (Jg-1K-1) | 0.8876 | 
| Thermal Expansion /(10-6/°C @25°C) | (16.5...19.4) | 
| Thermal shock resistance parameter | 800 W/m | 
| Refractive Index @ 1064 nm | 1.2996 | 
Optical properties
| Property | Value | 
| Optical Density | 0.1 to 0.8 | 
| Fluorescence lifetime | 2.4ms | 
| Concentrations | 0.5 mol % ~ 30 mol % | 
| Emission wavelength | 1015 nm ~ 1060 nm | 
| Absorption Coefficient | 1.0 cm-1 ~ 7 cm-1 | 
| Ground state absorption cross section | 0.8x10-20 cm2 | 
| Emission state absorption cross section: | 2.2x10-20 cm2 | 
| Transmission | 10% to 90% | 
| Coatings | AR≤ 0.2% @1030nm | 
| Damage Threshold: | > 500 MW / cm2 | 
Polishing Specification
| Property | Value | 
| Orientation Tolerence | < 0.5° | 
| Thickness/Diameter Tolerance | ±0.05 mm | 
| Surface Flatness | </8 @632 nm | 
| Wavefront Distortion | </8 @632 nm | 
| Surface Quality | 10/5 | 
| Parallel | 10 | 
| Perpendicular | 15 | 
| Clear Aperture | >90% | 
| Chamfer | <0.1×45° | 
| Maximum dimensions | 2*2-15*15 mm×20mm | 
Standard products
| Material | Dimensionsmm | Coatings | 
| Yb(5%):CaF2 | dia 5 | AR≤ 0.2% @1030+940nm | 
| 3x3 | ||
| 6x6 | ||
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