Nanjing Crylink Photonics Co.,Ltd
Growing crystal, Lingling Value.
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Description
Passive Q-switches or saturable absorbers generate high power laser pulses without the use of electro-optic Q-switches, thereby reducing the package size and eliminating a high voltage power supply. Co2+:MgAl2O4 is a relatively new material for passive Q-switching in lasers emitting from 1.2 to 1.6m, in particular, for eye-safe 1.54m Er:glass laser, but also works at 1.44m and 1.34m laser 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.
Features
Suitable for 1540 nm eye-safe lasers
High absorption section
Negligible excited state absorption
High optical quality
Uniformly distributed Co
Applications
Eye-safe 1540 nm Er:glass laser
1440 nm laser
1340 nm laser
Eye-safe laser range finder
Parameters
|
Property |
Value |
|
Chemicalformula |
Co2+:MgAl2O4 |
|
Crystalstructure |
Cubic |
|
Lattice parameters |
8.07 |
|
Density |
3.62g/cm3 |
|
Melting Point |
2105°C |
|
Refractive Index |
n=1.6948 @1.54 m |
|
Thermal Conductivity /(Wcm-1K-1@25°C) |
0.033W |
|
Specific Heat/ (Jg-1K-1) |
1.046 |
|
Thermal Expansion /(10-6 /°C@25°C |
5.9 |
|
Hardness (Mohs) |
8.2 |
|
Extinction Ratio |
25dB |
|
Orientation |
[100] or[111] < ±0.5° |
|
Opticaldensity |
0.1-0.9 |
|
DamageThreshold |
>500 MW/cm2 |
|
Dopingconcentration of Co2+ |
0.01-0.3 atm% |
Specifications
|
Property |
Value |
|
Concentrations |
(0.05~0.35)wt% |
|
Absorptioncoefficient |
07 cm-1 |
|
Ground-stateabsorption cross-section GSA(E-19 cm2) |
2.8(±0.4)@1340nm |
|
Excited stateabsorption cross-section ESA (E-20 cm2) |
2.0(±0.6)@1340nm |
|
Ground-stateabsorption cross-section GSA(E-20 cm2) |
3.5(±0.4)@1540nm |
|
Excited stateabsorption cross-section ESA (E-20 cm2) |
1.0(±0.6)@1540nm |
|
Workingwavelength |
12001600 nm |
|
EndConfiguration |
Flat/Flat |
|
Figureof Merit(FOM) |
100~300 |
|
Coatings |
AR/AR@1540R<0.2%; AR/AR@1340R<0.2% |