| Chromium Doped Yttrium
Aluminum Garnet Crystal (Cr4+:YAG) |
 |
Cr4+:YAG is an excellent crystal for
passive Q switching of Nd:YAG, other Nd and Yb doped lasers,
in the wavelength range from 800 nm to 1200 nm. Because of
its chemical stability, durability, good thermal conductivity
and high damage threshold (> 500 MW/cm2) and
being easy to be operated, it can replace traditional LiF,
Dye and color centers which are commonly used as passive Q-switching
materials. Cr4+:YAG is also an useful lasing material,
with output from 1350 nm to 1600 nm(tunable). |
CASTECH provides
Cr4+:YAG with Cr4+doping
level from 0.5mol% to 3mol%. The size could be from 2×2mm2 to 14×14mm2
with length from 0.1mm to 12mm. We can control the initial transmission
from 1% to 99% according to customers’ requirements.
Basic Properties
of Cr4+:YAG
| Crystal Structure |
Cubic Garnet |
| Dopant Level |
0.5 mol% ~ 3 mol% |
| Hardness |
8.5 |
| Damage Threshold |
> 500 MW/cm2 |
| Refractive Index |
1.82 @ 1064 nm |
The preliminary experiments of CASTECH’s
Cr4+:YAG showed that
the pulse width of passively Q-switched lasers could be
as short as 5ns for diode pumped Nd:YAG lasers and repetition
rate as high as 10kHz for diode pumped Nd:YVO4 lasers. Furthermore,
an efficient green output @ 532nm, and UV output @ 355nm
and 266nm 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.
Cr4+:YAG is
also a laser crystal with tunable output from 1.35μm to
1.6μm. It can generate ultrashort pulse laser (to fs pulsed)
when pumped by Nd: YAG laser at 1.064μm.
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Note:
When ordering Cr4+:YAG
crystal, Please specify the size, initial transmission and coatings.
For further information, please contact CASTECH.
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