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Rare Earth Ions Doped Yttrium Lithium Fluoride (RE: YLF) Laser Crystals
SKU: CS0019
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Yttrium Lithium Fluoride (YLF) Laser Crystal crystallizes are in the tetragonal I41/a space group. YLF has several superior properties including high transparency, birefringent (eliminates thermally induced depolarization loss), no absorption loss of sensitized ions, etc. By doping with different materials, the YLF laser crystal can present different properties that can be used for different applications. It is widely used for laser applications, medical diagnosis and treatment, electro-optical countermeasure, material processing, etc.
Technical Data
| Crystal Structure | Tetragonal, a= 5.16 Å, c= 10.85 Å |
| Density | 3.99 g/cm³ |
| Melting Point | 819 ℃ |
| Thermal Conductivity |
5.3 W/(mK) (a) 7.2 W/(mK) (c) |
| Thermal Expansion Coefficient |
14.3 × 10-6 /ºC (a) 8.4 × 10-6 /ºC (c) |
| Refractive Index @ 1064 nm |
n0: 1.448 ne: 1.470 |
| Size | up to 30 mm |
| Thickness | up to 50 mm |
| Orientation | a-cut, c-cut |
| Doping Ion | Tm | Ho | Tm, Ho | Yb | Pr |
| Absorption Peak Wavelength | 792 nm | 1940 nm | 792 nm | 960 nm | 444 nm |
| Absorption Cross Section | 0.55 × 10-20 cm2 | 1.2 × 10-20 cm2 | 0.93 × 10-20 cm2 | 10.5 × 10-21 cm2 | 8.0 × 10-20 cm2 |
| Fluorescence Lifetime | 16 ms | 10 ms | 8 ms | 2.1 ms | 50 µs |
| Laser Wavelength | 1900 nm | 2060 nm | 2065 nm | 1017 nm | 639 nm |
| Emission Cross Section | 4.0 × 10-21 cm2 | 1.8 × 10-20 cm2 | 1.5 × 10-19 cm2 | 4.1 × 10-21 cm2 | 2.0 × 10-19 cm2 |
Reference
1. Razumova, I., A. Tkachuk, A. Nikitichev, and D. Mironov. Spectral-luminescent properties of Tm: YLF crystal. Journal of Alloys and Compounds 225, no. 1-2 (1995): 129-132.
2. Rostami, Saeid, Alexander R. Albercht, Mohammad R. Ghasemkhani, Seth D. Melgaard, Aram Gragossian, Mauro Tonelli, and Mansoor Sheik-Bahae. Optical refrigeration of Tm: YLF and Ho: YLF crystals. In Optical and Electronic Cooling of Solids, vol. 9765, pp. 80-85. SPIE, 2016.