Descriptions:
Cr4+:YAG (Y3Al5O12) Chromium Doped Yttrium AIuminum Garnet crystal is 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.
Main
applications:
1)
Passively Q-switched lasers for laser rangefinders,
LIDAR, and LIBS systems
2)
Laser systems where short pulses are required
Advantages:
1)
High chemica stability and reliability
2)
Easy to operate
3)
Long lifetime and good thermal conductivity
Basic
properties of CrYAG
|
Chemical Formula
|
Cr4+:Y3Al5O12
|
|
Crystal Structure
|
Cubic
|
|
Mohs Scale of Mineral Hardness
|
8.5
|
|
Melting Point
|
1970 °C
|
|
Density, g/cm3
|
4.55
|
|
Coefficient of Thermal Conductivity @ 25°C, W x
cm-1x °K-1
|
0.14
|
|
Coefficient of Thermal Expansion
|
8.2 x 10-6/ ℃<100>
|
|
Young's Modulus
|
7.7x 106<100>
|
|
Thermal Shock Resistance
|
790 Wm-1
|
HGO offers CrYAG
specifications:
|
Orientation:
|
<100> or <110>
|
|
Initial absorption coefficient
|
0.1~8.5cm-1@1064nm
|
|
Initial transmission
|
3%~98%
|
|
Wavefront Distortion:
|
λ/8per inch @ 632.8 nm
|
|
Dimension Tolerances：
|
rods with diameter: +0.0/-0.05 mm , Length: ±0.1
mm
|
|
Surface Quality:
|
20/10 Scratch/Dig MIL-O-1380A
|
|
Parallelism:
|
< 10″
|
|
Perpendicularity:
|
< 10′
|
|
Clear Aperture:
|
> 90%
|
|
Surface Flatness:
|
< λ/10 @ 632.8 nm
|
|
Chamfer:
|
< 0.1 mm @ 45deg.
|
|
Size
|
Upon customer request
|
|
Coating
|
AR/HR/PR coating upon customer’s request
|
|
Damage Threshold
|
750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
|
|
Quality Warranty Period
|
One year
under proper use
|
Why
Choose HGO ?
HG OPTRONICS.,INC. supplies very high quality of Cr4+:YAG
passive Q-switch crystals Chromium Doped Yttrium AIuminum Garnet. The use of
high quality starting materials for crystal growth, boule interferometry, and
precise measurement of initial transmission and absorption using transmission
spectroscopy and ZYGO measurements, assures that each crystal will comply with
customer’s specification and perform well in laser system.
Tolerance of
initial transmission can be well controlled in as high precision as 0.5% which
could be very essential to some delicate laser systems.
Besides, based on
HGO’s advanced bonding technology, high quality of diffusion
bonding between Nd3+, Yb3+ or other ions doped YAG
host laser crystals and CrYAG are available from stock or for customization.
What is more,HGO have mature solutions for
different laser parameters especially in microchips solution and our engineer
are very glad to discuss and provide solutions for customers.
