Cr:YAG crystals
Main features
- Good chemical stability and reliability
- Long lifetime and good thermal conductivity
- Easy to operate
- Custom crystals available upon request
Application examples
- Passively Q-switched lasers for laser rangefinders, LIDAR, and LIBS systems
- Laser systems where short pulses are required
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- Description
- Properties
- Absorption and emission curves
- Specifications
Cr4+:YAG crystals are ideal for passive Q-switch operation of Nd:YAG and other Nd3+ or Yb3+ doped laser crystals in the wavelength range of 900 nm to 1200 nm. A remarkable feature of Cr4+:YAG is the high damage threshold of >10 J/cm2@1064 nm, 10 ns. Its absorption band extends from 900 nm to 1200 nm and peaks around 1060 nm with a very large absorption cross-section.
| Spectroscopic and thermo-mechanical properties | ||||||
|---|---|---|---|---|---|---|
| Material | σgsa, cm2@1,064 µm | σesa, cm2@1,064 µm | τsa3) | Laser crystal | λlaser | σgsa/σem4) |
| Cr4+:Y3Al5O12 | 46 × 10-19 cm2 | 8,2 × 10-19 cm2 | 3,4 μs | Nd:YAG | 0,946 µm | 130 |
| Nd:YAG | 1,06 µm | 17 | ||||
| Nd:GSAG | 1,06 µm | 55 | ||||
| Nd:YVO4 | 1,06 µm | 3,5 | ||||
| Nd:GdVO4 | 1,06 µm | 5 | ||||
| Nd:LuVO4 | 1,06 µm | 3,4 | ||||
| Nd:LSB | 1,06 µm | 40 | ||||
| Nd:YAP | 1,08 µm | 14 | ||||
| Yb:NLM | 1,01 µm | 500 | ||||
| Yb:YVO4 | 1,02 µm | 625 | ||||
| Yb:GGG | 1,025 µm | 250 | ||||
| Yb:YAG | 1,03 µm | 250 | ||||
| Yb:LuAG | 1,03 µm | 185 | ||||
| Yb:KGW | 1,035 µm | 185 | ||||
| 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 |
| Cr:YAG crystals | |
|---|---|
| Initial transmission T0 | 5-99%@1064 nm |
| Initial transmission T0 tolerance | ±1% (for values larger than 80 %) |
| Clear aperture | >90% |
| Face dimensions tolerance | +0,0/-0,1 mm |
| Parallelism error | <10 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<0,15%)@1064 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
Coatings
SKU
PRICE
QUANTITY
⌀3 mm
20%
AR/AR@1064 nm
7279
195 €
⌀3 mm
30%
AR/AR@1064 nm
7280
195 €
⌀3 mm
40%
AR/AR@1064 nm
7281
195 €
⌀3 mm
50%
AR/AR@1064 nm
7282
195 €
⌀3 mm
60%
AR/AR@1064 nm
7283
195 €
⌀3 mm
70%
AR/AR@1064 nm
7284
195 €
⌀3 mm
80%
AR/AR@1064 nm
7285
195 €
⌀3 mm
85%
AR/AR@1064 nm
7286
195 €
⌀3 mm
90%
AR/AR@1064 nm
7287
195 €
⌀3 mm
95%
AR/AR@1064 nm
7288
195 €
⌀3 mm
98%
AR/AR@1064 nm
7289
195 €
3x3 mm
20%
AR/AR@1064 nm
7290
195 €
3x3 mm
30%
AR/AR@1064 nm
7291
195 €
3x3 mm
40%
AR/AR@1064 nm
7292
195 €
3x3 mm
50%
AR/AR@1064 nm
7293
195 €
3x3 mm
60%
AR/AR@1064 nm
7294
195 €
3x3 mm
70%
AR/AR@1064 nm
7295
195 €
3x3 mm
80%
AR/AR@1064 nm
7296
195 €
3x3 mm
85%
AR/AR@1064 nm
7297
195 €
3x3 mm
90%
AR/AR@1064 nm
7298
195 €
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