Tm:YAP laser crystal (Tm-doped YALO3).The wavelength of Tm:YAP laser is stable around 1.94 μm and depends on the direction of the crystal. Tm:YAP has highest local absorption in the IR region, it’s lifetime is from 3.81ms to 4.93ms, the temperature range is between 30◦C and 1350◦C. Tm:YAP crystal has a-c directions, the a-cut and b-cut Tm:YAP laser are widly used. In regard to Tm:YAP, the upper laser energy have 9 3H4 Stark levels, and the lower laser energy have 13 3H6 Stark levels. Tm:YAP has better performance and availability of high power laser at 794 nm. Tm:YAP is an outstanding crystal for high efficiency laser output.
Tm:YAP– 2um high efficiency output laser crystal.
As 2um laser crystals, Tm:YAP crystal havs a wide range of applications in medicine, laser radar and also atmospheric sensing. For example, Tm:YAP laser is a continuous-wave laser delivered via silica fibers, it would have great potential for stereotaxic neurosurgery. The fiber-coupled Tm:YAP laser system have been proposed for the delivery of photothermal therapies in medical applications.
Parameter
| Crystal Structure | orthorhombic – Pbnm |
| Thermal Conductivity | 11 W/(m*k) |
| Refractive Index at 632 nm | 1.92 (na), 1.93 (nb), 1.94 (nc) |
| Optical Transition | 3F4→3H6 |
| Absorption Cross-section | 3.7~8.5 x 10-21cm2 |
| Fluorescence Life | 4.4~7.7ms |
| Emission Cross-section | 5~6 x 10-21cm2 |
| Emission Wavelength | 1.98mm@a axis，1.94mm@b axis |
| Pump Wavelength of Diode | 794.8nm@a axis，793.5nm@b axis |
| Dopant Concentrations | Tm: 0.2~15at% |
| Orientations | [010] or [100]（Pnma）within 5° |
| Rod Sizes | Diameter 2~10mm, length 2~100mm |
| Wavefront Distortion | ≤0.125λ/25mm@632.8nm |
| Extinction Ratio | ≥25dB |
| Dimensional Tolerance | Diamter：+0.00/-0.04, length: ±0.5mm |
| Parallelism | ≤10″ |
| Perpendicularity | ≤5′ |
| Flatness | λ/8@632.8nm |
| Surface Quality | 10/5 (MIL-O-13830A) |
| Chamfer | 0.15±0.05mm |
| AR coating reflectivity | ≤0.25% |
- High efficiency laser output
- Highest local absorption in the IR region
- Good physical and chemical performance
- Direct line polarized laser emission
- Laser radar
- Atmospheric sensing
- Stereotaxic neurosurgery
- Photothermal therapies
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