Ma Passive Q-switches kapena zotengera zotulutsa mphamvu zimapanga ma pulse amphamvu kwambiri a laser popanda kugwiritsa ntchito ma electro-optic Q-switches, potero amachepetsa kukula kwa phukusi ndikuchotsa magetsi okwera kwambiri.Co2+:MgAl2O4ndi zinthu zatsopano kwa kungokhala chete Q-kusintha mu lasers emitting kuchokera 1.2 kuti 1.6μm, makamaka, chifukwa maso-otetezeka 1.54μm Er: galasi laser, komanso amagwira ntchito pa 1.44μm ndi 1.34μm laser wavelengths.Spinel ndi kristalo wolimba, wokhazikika womwe umapukuta bwino.