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Co2+:MgAl2O4 Cospinel is a relatively new material for passive Q-switching in lasers
emitting from 1.2 to 1.6 μm, in particular, for eye-safe 1.54 μm Er:glass
laser, but also works at 1.44 μm and 1.34 μm wavelengths. Spinel is a hard,
stable crystal that polishes well. Cobalt substitutes readily for magnesium in
the Spinel host without the need for additional charge compensation ions. High
absorption cross section (3.5×10-19 cm2) permits Q-switching of
Er:glass laser without intracavity focusing both with flash-lamp and diode-laser
pumping. Negligible excited-state absorption results in high contrast of
Q-switch, i.e. the ratio of initial (small signal) to saturated absorption is
higher than 10.
Product Origin:
ChinaShipping Port:
Fuzhou, ChinaLead Time:
3-4weeks
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.
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