Abstract
The saturable absorption properties of Co2 + : MgAl2O4 crystals in three different cutting directions were studied experimentally. The characteristic of the transmission of polarized incidence light through the [100], [110], and [111]-cut Co2 + : MgAl2O4 single crystal was investigated. The [110]-cut crystal had the maximum transmittance observed. We conclude that using a [110]-cut Co2 + : MgAl2O4 crystal to form a Co2 + : MgAl2O4 / Er,Yb:glass passive Q-switched microchip laser can improve the output characteristics of the laser, such as pulse energy and extinction ratio without changing any other parameters.
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