When the voltage is added to the electro-optic crystal, the refractive index and other optical properties of the crystal change, change the polarization state of the light wave, so that the circularly polarized light becomes elliptically polarized light, and then becomes linearly polarized light through the polarizer, and the light intensity is modulated. Nyob rau lub sijhawm no, cov yoj yoj muaj suab nrov muaj cov lus qhia suab thiab nthuav tawm hauv chaw pub dawb. Tus lej photodetector yog siv los txais cov teeb liab hloov kho kho qhov muag, thiab tom qab ntawd lub Circuit Court hloov pauv, thiab tom qab ntawd lub Circuit Coupersion yog nqa tawm mus rau cov teeb liab kho tshiab rau hauv cov cim hluav taws xob. Lub suab teeb liab tau rov qab los ntawm Demodator, thiab thaum kawg cov kev kis rau lub suab nrov tau ua tiav. Lub ntsiab lus siv voltage yog lub suab nrov nrov teeb liab, uas tuaj yeem yog cov zis ntawm cov xov tooj cua lossis cov kab xev tsav, thiab yog qhov sib txawv ntawm lub sijhawm.