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.
|Crystal Structure||orthorhombic – Pbnm|
|Thermal Conductivity||11 W/(m*k)|
|Refractive Index at 632 nm||1.92 (na), 1.93 (nb), 1.94 (nc)|
|Absorption Cross-section||3.7~8.5 x 10-21cm2|
|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|| or （Pnma）within 5°|
|Rod Sizes||Diameter 2~10mm, length 2~100mm|
|Dimensional Tolerance||Diamter：+0.00/-0.04, length: ±0.5mm|
|Surface Quality||10/5 (MIL-O-13830A)|
|AR coating reflectivity||≤0.25%|