Modulator na gani na lantarki (EOM) yana sarrafa iko, lokaci da polarization na katako na Laser ta hanyar sarrafa siginar ta hanyar lantarki.
Modulator mafi sauƙi na lantarki shine na'ura mai daidaitawa wanda ya ƙunshi akwatin Pockels guda ɗaya kawai, inda filin lantarki (wanda aka yi amfani da shi zuwa kristal ta hanyar lantarki) yana canza lokacin jinkiri na katako na Laser bayan ya shiga cikin crystal. Yanayin polarization na katakon abin da ya faru yawanci yana buƙatar zama daidai da ɗaya daga cikin gatura na gani na crystal don kada yanayin polarization na katako ya canza.
A wasu lokatai ƙanƙanin daidaitawar lokaci (lokaci ko lokaci) kawai ake buƙata. Misali, EOM ana yawan amfani dashi don sarrafawa da daidaita mitar resonants na gani. Ana amfani da na'urori masu daidaita sauti yawanci a yanayin da ake buƙatar daidaitawa na lokaci-lokaci, kuma ana iya samun babban zurfin daidaitawa tare da matsakaicin ƙarfin tuƙi. Wani lokaci zurfin daidaitawa yana da girma sosai, kuma yawancin sidelobe (hasken tsefe mai haske, tsefe haske) ana samar da su a cikin bakan.
Polarization modulator
Dangane da nau'in da kuma jagorancin kristal maras kyau, da kuma jagorancin filin lantarki na ainihi, jinkirin lokaci yana da alaka da jagorancin polarization. Saboda haka, akwatin Pockels na iya ganin faranti mai sarrafa wutar lantarki da yawa, kuma ana iya amfani da shi don daidaita jihohin polarization. Don hasken shigarwar da ba daidai ba (yawanci a kusurwar 45° daga axis na crystal), polarization na katakon fitarwa yawanci elliptic ne, maimakon kawai jujjuya shi da Angle daga ainihin hasken polarized madaidaiciya.
Amplitude modulator
Lokacin da aka haɗa su da sauran abubuwan gani, musamman tare da polarizers, ana iya amfani da akwatunan Pockels don wasu nau'ikan daidaitawa. Na'ura mai haɓakawa a cikin Hoto 2 yana amfani da akwatin Pockels don canza yanayin polarization, sannan yana amfani da polarizer don canza canjin yanayin polarization zuwa canji a cikin girma da ƙarfin hasken da aka watsa.
Wasu aikace-aikace na yau da kullun na masu daidaitawa na electro-optic sun haɗa da:
Ƙaddamar da ƙarfin wutar lantarki, alal misali, don bugu na laser, rikodin bayanan dijital mai sauri, ko hanyoyin sadarwa mai sauri;
An yi amfani da shi a cikin hanyoyin tabbatar da mitar laser, alal misali, ta amfani da hanyar Pound-Drever-Hall;
Q yana canzawa a cikin na'urori masu ƙarfi (inda ake amfani da EOM don rufe resonator na laser kafin raɗaɗi);
Makulli mai aiki (EOM modulation cavity asarar ko lokacin hasken tafiya zagaye, da sauransu);
Canja bugun bugun jini a cikin masu ɗaukar bugun jini, ingantattun amplifiers da kuma karkatar da laser.
Lokacin aikawa: Oktoba-11-2023