V:YAG crystals
Main features
- High ground state absorption
- Insignificant excited state absorption
- The high contrast of the Q-switch
- Good optical, mechanical, and thermal properties
- UV-resistant and features a high damage threshold
- Custom crystals available upon request
Application examples
- Passively Q-switched lasers for laser rangefinders, LIDAR, and LIBS systems
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
V:YAG is a relatively new saturable absorber. Passive Q-switch operation is available in the spectral range from 1064 nm to 1440 nm, primarily because of an extremely high ground state. These crystals can be used with active laser media such as Nd:YAG, Nd:YAP, Nd:KGW, Nd:YVO4 and provide good lasing characteristics in passive Q-switched lasers. V:YAG features excellent optical, mechanical, and thermal properties and can be grown by the Czochralski method.
| Spectroscopic and thermo-mechanical properties | ||||||
|---|---|---|---|---|---|---|
| Material | σgsa1)@1,34 µm | σesa2)@1,34 µm | τsa3) | Laser crystal | λlaser | σgsa/σem4) |
| V3+:Y3Al5O12 | 72 × 10-19 | 7,4 × 10-19 | 5-37 ns | Pr:YAP | 0,747 μm | 10 |
| Ti:Al2O3 | 0,78 μm | 25 | ||||
| Cr:LiCAF | 0,78 μm | 80 | ||||
| Nd:GGG | 0,93 μm | - | ||||
| Nd:YLF | 1,05 μm | 15 | ||||
| Nd:YAG | 1,06 μm | 8 | ||||
| Nd:YVO4 | 1,06 μm | 1,5 | ||||
| Yb:KYW | 1,035 μm | 70 | ||||
| Nd:YAP | 1,34 μm | 24 | ||||
| Nd:GdVO4 | 1,34 μm | 30 | ||||
| Er:glass | 1,54 μm | 45 | ||||
| Crystal structure | Cubic |
| Density | 4,56 g/cm3 |
| Thermal expansion coefficient | 6,14 × 10-6 K-1 |
| Thermal conductivity | 11,2 Wm-1K-1 |
| Mohs hardness | 8,2 |
| Refractive index | 1,82@1064 nm |
| V:YAG crystals | |
|---|---|
| Initial transmission T0 | 30-98%@1340 nm |
| Initial transmission T0 tolerance | ±1% (for values larger than 80%) |
| Clear aperture | >90% |
| Face dimensions tolerance | +0,0/-0,1 mm |
| Parallelism error | <20 arcsec |
| Perpendicularity error | <10 arcmin |
| Protective chamfers | <0,1 mm at 45˚ |
| Surface quality | 10-5 S-D |
| Surface flatness | <λ/8@632,8 nm |
| Wavefront distortion | <λ/4@632,8 |
| Coatings | AR(R<0,2%)@1310-1360 nm on both sides |
| Laser-induced damage threshold | >10 J/cm2@1064 nm, 10 ns |
| Mount | Unmounted |
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Face dimensions
Initial transmission
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3x3 mm
30%
7312
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3x3 mm
40%
7313
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3x3 mm
50%
7314
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3x3 mm
60%
7315
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3x3 mm
70%
7316
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3x3 mm
80%
7317
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3x3 mm
85%
7318
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3x3 mm
90%
7319
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3x3 mm
95%
7320
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⌀5 mm
30%
7321
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⌀5 mm
40%
7322
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⌀5 mm
50%
7323
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⌀5 mm
60%
7324
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⌀5 mm
70%
7325
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⌀5 mm
80%
7326
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⌀5 mm
85%
7327
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⌀5 mm
90%
7328
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⌀5 mm
95%
7329
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