Descriptions:
Co2+:MgAl2O4 Cobalt-doped
magnesium aluminate spinel is a relatively new material for passive Q-switching specially for eye-safe 1.54 μm Er:glass
laser, but also works at 1.44 μm and 1.34 μm wavelengths.
Main
applications:
1)
Passive Q-switch for Radar and Ranging Er:Glass
lasers @1,35µm
2)
Passive Q-switch for Medical lasers @1,500 µm
Advantages:
1)
Rare excited absorption
2)
High constant of Q-switch
3)
High absorption section
4)
Long excited lifetime
5)
Evenly distributed cobalt
6)
Wide absorption band
Basic
properties of Cospinel
|
Chemical formula
|
Co2+:MgAl2O4
|
|
Crystal structure
|
Cubic
|
|
Lattice parameters
|
8.07Å
|
|
Density
|
3.62 g/cm3
|
|
Melting Point
|
2105°C
|
|
Refractive Index
|
n=1.6948 @1.54 μm
|
|
Thermal Conductivity/(W·cm-1·K-1@25°C)
|
0.033W
|
|
Thermal Expansion /（10-6 /°C@25°C ）
|
1.046
|
|
Specific Heat/ (J·g-1·K-1)
|
5.9
|
|
Hardness (Mohs)
|
8.2
|
|
Extinction Ratio
|
25dB
|
|
Density
|
1.6-1.75
|
HGO offers Cospinel
specifications:
|
Orientation:
|
<100> or <111>
|
|
Initial absorption coefficient
|
0~7cm-1@1064nm
|
|
Initial transmission
|
50%~99%
|
|
Wavefront Distortion:
|
λ/8per inch @ 632.8 nm
|
|
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 Co2+:MgAl2O4 Cobalt-doped magnesium aluminate
spinel.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 within 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 optical bonding
kits between Er:Yb:glass and cospinel q-switch can also be supplied.
HGO could also provide
high quality polishing and apply high laser induced damage threshold coating
for the switch.and also for other related cavity lens and mirrors for the eye
safe lasers systems.
