Tm:YAP Crystals
Tm doped crystals embrace several attractive features that nominate them as the material of choice for solid-state laser sources with emission wavelength tunable around 2um. It was demonstrated that Tm:YAG laser can be tuned from 1.91 up to 2.15um. Similarly,Tm:YAP laser can tuning range from 1.85 to 2.03 um.The quasi-three level system of Tm:doped crystals requires appropriate pumping geometry and good heat extraction from the active media.On the other hand,Tm doped materials benefit from a long fluorescence life time,which is attractive for high-energy Q-Switched operation.Also,the efficient cross-relaxation with neighbouring Tm3+ ions produces two excitation photons in upper laser level for one absorbed pump photon.This makes the laser very efficient with quantum efficiency approaching two and reduces thermal loading. Tm:YAG and Tm:YAP found their application in medical lasers, radars and atmospheric sensing. Properties of Tm:YAP depends on crystals orientation.Crystals cut along the 'a' or 'b' axis are mostly used.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Space group | D162h (Pnma) |
| Lattice constants | a=5.307,b=7.355,c=5.176 |
| Melting point | 1850±30 ℃ |
| Melting point | 0.11 ℃ |
| Thermal expansion | 4.3//a,10.8//b,9.5//c |
| Density | 4.3//a,10.8//b,9.5//c |
| Refractive index [0.589 mm] | 1.943//a,1.952//b,1.929//cat 0.589 mm |
| Hardness(Mohs scale) | 8.5-9 |
| Dopant conenteation | Tm: 0.2~15at% |
| Orientation | within 5° |
| “avefront distortion [632.8nm] | <0.125A/inch@632.8nm |
| 7od sizes | diameter 2~10mm, Length 2~100mm Jpon request of customer |
| Dimensional tolerances | Diameter +0.00/-0.05mm, Length: ± 0.5mm |
| Barrel finish | Ground or polished |
| Parallelism | ≤10″ |
| Perpendicularity | ≤5′ |
| Flatness [632.8nm] | ≤λ/8@632.8nm |
| surface Quality [MIL-0-13830B] | L0-5(MIL-0-13830B) |
| Chamfer | 3.15 ±0.05 mm |
| AR Coating Reflectivity | < 0.25% |
Key Features
Datasheet
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