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Ho:Cr:Tm:YAG
Advantages of Ho:Cr:Tm:YAG Crystal：
• High slope efficiency;
• Pumped by flash lamp or diode;
• Operates well at room temperature;
• Operates in a relatively eye-safe wavelength range;
Optical and Spectral Properties of Ho:Cr:Tm:YAG Crystals：
|
Laser Transition |
5 I 7 → 5 I 8 |
|
Laser Wavelength |
2.097 µm |
|
Photon Energy |
9.55 x 10-20 J |
|
Emission Cross Section |
7 x 10-21 cm2 |
|
Fluorescence Lifetime |
8.5 ms |
|
Index of Refraction |
1.80 @2.08 µm |
|
Absorption Linewidth |
4 nm |
|
Diode Pump Band |
781 nm |
|
Major Pump Band |
400~800 nm |
Specifications of Ho:Cr:Tm:YAG crystal：
|
Doped Concentration |
Ho:~0.35 at%, Tm:~5.8at%, Cr:~1.5at% |
|
Wavefront Distortion |
≤ 0.125λ/inch(@1064nm) |
|
Extinction Ratio |
≥25 dB |
|
Rod Sizes |
Diameter:3~6mm,Length:50~120mm Upon request of customer |
|
Dimensional Tolerances |
Diameter:+0.00/-0.05mm, Length: ± 0.5mm |
|
Barrel Finish |
Ground finish: 400# Grit |
|
Parallelism |
≤30″ |
|
Perpendicularity |
≤5′ |
|
Flatness |
λ/10 |
|
Surface Quality |
10/5 |
|
Chamfer |
0.006″±0.002″ at 45°± 5° |
|
AR Coating Reflectivity |
≤ 0.25% (@2094nm) |
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