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 Yong Hee
Co Spinel
    Publish time 2022-12-30 10:11    
Co Spinel

Co2+:MgAl2O4 is a relatively new material for passive Q-switching in lasers emitting from 1.2~1.6 um, in particular, for eye-safe 1.54 um Er:glass laser, also works at 1.44 um and 1.34 um wavelength. High absorption cross section of 3.5 x 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 & saturated absorption signal is higher than 10, the excellent optical, mechanical and thermal properties of the crystal gives an opportunity to design compact and reliable laser sources with this passive Q-switch.


High optical quality

With uniform Co distribution

High absorption cross section

Negligible excited-state absorption


Passively Q-switch materials for solid state laser (1540nm eye safe lasers)


Typical DimensionØ6mm
Dimension Tolerance+0/-0.2mm
Thickness Tolerance+/-0.2mm
Surface Quality20/10
Barrel finishGround 
Clear Aperture>90%
AR Coating ReflectivityR≤0.2%@1540nm

Product Classification