Tm:YAP Crystal
- Excellent physical and chemical properties.
- Higher output efficiency at 2μm than Tm:YAG.
- Direct output of linearly polarized light.
- LD pump absorption bandwidth is 4nm wider than that of Tm:YAG crystal.
- The 795nm pump band matches the emission wavelength of AlGaAs diodes better.
Tm:YAP crystal is one of the most important crystals for LD pumping 2μm laser. The anisotropic structure of Tm:YAP produces anisotropic emission cross section. Tm:YAP crystals with different orientations have different output wavelengths and operating forms for different functions. Compared with the physical and chemical properties of Tm:YAG, the 795nm pump absorption band of Tm:YAP matches the emission wavelength of commonly used high-power AlGaAs diodes better. Tm:YAP has many advantages such as 4nm wider pump absorption bandwidth than that of Tm:YAG, higher efficiency, direct output of linearly polarized light.
Main Specifications | ||
Dimensions | Length | 2 ~ 100 mm (± 0.5 mm) |
Diameter | 2 ~ 10 mm (+0.00, -0.05 mm) | |
Tm Concentration | 0.2 ~ 15.0 atm% | |
Orientation | [010] or [100] (± 5°) | |
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° | |
Extinction Ratio | ≥ 25 dB | |
Coating | AR (R<0.25% @ 1980/1940 nm) |