Co2+:MgAl2O4 crystals

Co²⁺:MgAl₂O₄ 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. 

High optical quanlity；

With uniform Co distribution；

High absorption cross section；

Negligible excited-state absorption；

Note:  When ordering Cospinel crystal, please specify the aperture, initial transmission(To) and coatings.