Passive Q-switching Co Spinel Co2+ MgAl2O4 Crystal
Introduction:
Crystro's 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+:MgAl2O4is a relatively new material for passive Q-switching in lasers emitting from 1.2 to 1.6μm, in particular, for eye-safe 1.54μm Er:glass laser, but also works at 1.44μm and 1.34μm 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. Negligible excited-state absorption results in high contrast ratio of Q-switch, i.e. the ratio of initial (small signal) to saturated absorption is higher than 10.
Features:
Suitable for 1540 nm eye-safe lasers
High absorption section
Negligible excited state absorption
High optical quality
Uniformly distributed Co
| 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) | 0.033 W |
| Specific Heat/ (J·g-1·K-1) | 1.046 |
| Thermal Expansion /(10-6 /°C@25°C) | 5.9 |
| Hardness (Mohs) | 8.2 |
| Extinction Ratio | 25 dB |
| Orientation | [100] or [111] < ±0.5° |
| Optical density | 0.1-0.9 |
| Damage Threshold | >500 MW/cm2 |
| Doping concentration of Co2+ | 0.01-0.3 atm% |
About US
Crystro has perfect automatic production equipment, the current products are mainly concentrated in the YAG, TGG, TSAG,GGG, LGS, Cr4+:YAG,Co2:MgAl2O4, Ce:GAGG , Ce:YAG andCe: LuYAG production. the application of advanced process technology of manufacturing, reducing energy consumption to ensure sustainable development field of research and development.
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Dia 5mm Co Spinel MgAl2O4 Q Switching Crystals For 1540nm Eyesafe Lasers Images
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