|
Introduction
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
|
| CYG0605
|
6mm
|
T=50%
|
AR/AR@1064nm
|
| CYG0608 |
6mm
|
T=80%
|
AR/AR@1064nm
|
| CYG1004 |
10mm
|
T=40%
|
AR/AR@1064nm
|
| CYG1006 |
10mm
|
T=60%
|
AR/AR@1064nm
|
|
Q-Switch