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Cr4+:YAG (Y3Al5O12) is an ideal material for passive Q-switching of Nd:YAG and other Nd and Yb doped lasers in the wavelength range of 0.8 to 1.2 mm. One of the remarkable features of Cr4+:YAG is high damage threshold of 500-1000 MW/cm2. It is easy to be operated and therefore outstandingly suited to replace LiF and Dye which are commonly used for passive Q-switching. Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system size and weight.
Basic Properties of Cr4+:YAG:
| Formula: |
Cr4+:Y3Al5O12 |
| Crystal Structure: |
Cubic Garnet |
| Dopant Level: |
0.5 mol% ~ 3 mol% |
| Thermal conductivity [W/m/K]: |
12.13 |
| Hardness: |
8.5 (Mohs) |
| Damage Threshold: |
> 500 MW/cm2 |
| Refractive Index: |
1.82 @ 1064 nm |
The preliminary experiments of Cr:YAG showed that the pulse width of passively Q-switched lasers could be as short as 9 ns for diode pumped Nd:YAG lasers and repetition as high as 10kHz for diode pumped Nd:YVO4 lasers. Furthermore, an efficient green output @ 532 nm, and UV output @ 355 nm and 266 nm were generated, after a subsequent intracavity SHG in KTP or LBO, THG and 4HG in LBO and BBO for diode pumped and passive Q-switched Nd:YAG and Nd:YVO4 lasers.
Specifications:
Flatness: < l/8
Wavefront Distortion: < l/4
Parallelism: < 30"
Surface quality: 10/5 scratch/dig
AR-coating: R<0.2% @ 1064 nm
Note: When ordering Cr4+:YAG crystal, please specify the aperture, initial transmission(To) and coatings.
Standard Products
|
Part No. |
Dia. |
T |
Coating |
|
CY0605 |
6mm |
T=50% |
AR/AR@1064nm |
|
CY0608 |
6mm |
T=80% |
AR/AR@1064nm |
|
CY1004 |
10mm |
T=40% |
AR/AR@1064nm |
|
CY1006 |
10mm |
T=60% |
AR/AR@1064nm | | 
