Passive Q-swichi kana saturable absorbers inogadzira yakakwira simba laser pulses pasina kushandisa electro-optic Q-swichi, nekudaro ichidzikisa saizi yepasuru uye kubvisa yakakwira voltage magetsi.Co2+:MgAl2O4chinhu chitsva chezvisinganzwisisike Q-kuchinja mune lasers inobuda kubva 1.2 kusvika 1.6μm, kunyanya, yeziso-yakachengeteka 1.54μm Er: girazi laser, asi inoshandawo pa1.44μm uye 1.34μm laser wavelengths.Spinel ikristaro yakaoma, yakagadzikana inopenya zvakanaka.