Lokacin da aka ƙara ƙarfin lantarki zuwa kristal na electro-optic, index refractive da sauran kayan aikin gani na kristal suna canzawa, suna canza yanayin polarization na igiyar haske, ta yadda hasken da aka ɗaure shi ya zama haske mai launi, sa'an nan kuma ya zama hasken polarized madaidaiciya. ta hanyar polarizer, kuma an daidaita ƙarfin hasken.A wannan lokacin, kalaman haske yana ƙunshe da bayanan sauti kuma yana yaduwa cikin sarari kyauta.Ana amfani da na'urar gano hoto don karɓar siginar da aka gyara a wurin karɓa, sannan ana aiwatar da jujjuyawar kewayawa don canza siginar gani zuwa siginar lantarki.Ana dawo da siginar sauti ta hanyar demodulator, kuma a ƙarshe an gama watsa siginar na gani na sauti.Wutar lantarki da ake amfani da ita ita ce siginar sauti da ake watsawa, wanda zai iya zama fitowar na'urar rikodin rediyo ko na'urar tef, kuma a zahiri siginar wutar lantarki ce da ke bambanta akan lokaci.