Achieve pejxeem inversion, siav rau lub chaw pib tej yam kev mob thiab resonant mob. Stimulated emission ntawm lub teeb yog ib qho tseem ceeb rau cov pejxeem inversion, yog coj hauv lub tshuab hluav taws xob semiconductor hauv lub valence band rau hauv kev sib dhos band. Nyob rau hauv thiaj li yuav tau Ionic pejxeem inversion, feem ntau yog nyob rau hauv hnyav ncawv doped p-hom thiab n-hom khoom PN hlws ris, yog li ntawd nyob rau hauv lub xub ntiag ntawm lub applied voltage, tau tshwm sim nyob rau hauv lub cheeb tsam nyob ze ntawm lub ion inversion-nyob rau hauv siab Fermi EFC tuas cov electrons nyob rau hauv conduction band hauv qab thiab siab dua qis Fermi EFV cia qhov nyob hauv lub valence band. Achieve pejxeem inversion yog yuav tsum tau rau laser, tab sis tsis yog ib tug txaus mob. Los tsim lub laser, tab sis kuj tseem muaj qhov tsawg kawg nkaus ntawm qhov tsis tshua muaj kab noj hniav, qhov chaw loj ntawm cov resonator yog ob lub iav zoo tib yam, cov tshuaj ua kom tawm los ntawm kev tawm ntawm lub teeb ci rov qab thiab rov los ntawm ob daim iav, tas li tsim cov kev tawm tshiab, uas nthuav . Tsuas yog tus nce ntawm lub amplification los ntawm tsa emission ntawm hluav taws xob yog ntau dua qhov tsis nyob rau hauv lub laser, uas raws li ib tug tej yam pib tej yam kev mob
