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Tm:YLF Crystal
-Strong absorption band for laser diode pumping
-Weak thermal lens effect
- High polarization purity
- Customized production available
Tm3+:YLF crystal has a high absorption peak around 792 nm which locates in the diode pumping range, and also has a cross-relaxation process that provides the possibility for each absorbed pump photon to produce to ions at higher laser energy level. Tm3+: YLF laser is very suitable as a pump source for Ho3+:YAG laser. This is due to the good overlap of the emission band of Tm3+:YLF and the absorption band of Ho3+:YAG, and the ability to produce a linearly polarized output. Furthermore, the refractive index of Tm3+:YLF decreases with temperature, leading to negative thermal lens effect, which is partially compensated by positive lens effect caused by their convex end.
Main Specifications | ||
Dimensions | Length | 5 ~ 120 mm (± 0.5 mm) |
Diameter | 3 ~ 10 mm (+0.00, -0.05 mm) | |
Tm Concentration | 1.0 ~ 5.0 atm% | |
Orientation | [100] or [001] (± 1°) | |
Wavefront Distortion | λ/4 per inch @ 633 nm | |
Barrel Finish | Fine ground (400#) | |
End Surface Parallelism | ≤ 10” | |
Perpendicularity | ≤ 5’ | |
End Surface Flatness | λ/10 @ 633 nm | |
End Surface Quality | 10-5 [s-d] (MIL-PRF-13830B) | |
Chamfer | 0.15 ± 0.05 mm @ 45° | |
Coating | AR (R<0.25% @ 1910 nm) | |
