Electro-optical modulator (EOM) e laola matla, mohato le polarization ea lebone la laser ka ho laola lets'oao ka mokhoa oa elektroniki.
Mokhoa o bonolo ka ho fetisisa oa electro-optic modulator ke modulator ea mohato e nang le lebokose le le leng feela la Pockels, moo sebaka sa motlakase (se sebelisoang ho kristale ka electrode) se fetola ho lieha ha mohato oa lebone la laser ka mor'a hore le kene ka kristale. Boemo ba polarization ba sepakapaka sa ketsahalo hangata bo hloka ho bapa le e 'ngoe ea lilepe tsa optical tsa kristale e le hore boemo ba polarization bo se ke ba fetoha.
Maemong a mang, ho hlokahala feela ho feto-fetoha ha mekhahlelo e nyane haholo (ka nako e itseng kapa ka nako e telele). Ka mohlala, EOM e atisa ho sebelisoa ho laola le ho tsitsisa maqhubu a resonant a resonator optical. Hangata li-modulator tsa resonance li sebelisoa maemong ao ho ona ho hlokahalang ho feto-fetoha ha nako le nako, 'me botebo bo boholo ba modulation bo ka fumanoa ka motlakase o itekanetseng oa ho khanna. Ka linako tse ling botebo ba ho feto-fetoha ha molumo bo boholo haholo, 'me li-sidelobe tse ngata (jenereithara e khanyang ea kama, lekama le khanyang) li hlahisoa ka bongata.
Polarization modulator
Ho itšetlehile ka mofuta le tataiso ea kristale e sa tloaelehang, hammoho le tataiso ea sebaka sa sebele sa motlakase, ho lieha ha mohato ho boetse ho amana le tataiso ea polarization. Ka hona, lebokose la Pockels le khona ho bona lipoleiti tsa maqhubu a laoloang ke li-multi-voltage, hape le ka sebelisoa ho fetola maemo a polarization. Bakeng sa leseli le kenngoeng ka mokhoa o ikhethileng (hangata e le Angle ea 45 ° ho tloha ho kristale axis), polarization ea beam e hlahisoang hangata ke elliptic, ho fapana le ho potoloha feela ka Angle ho tsoa khanyeng ea pele ea polarized.
Amplitude modulator
Ha e kopantsoe le likarolo tse ling tsa optical, haholo-holo ka polarizers, mabokose a Pockels a ka sebelisoa bakeng sa mefuta e meng ea modulation. Modulator ea amplitude ho Setšoantšo sa 2 e sebelisa lebokose la Pockels ho fetola boemo ba polarization, ebe o sebelisa polarizer ho fetola phetoho ea boemo ba polarization ho fetoha ha amplitude le matla a leseli le fetisitsoeng.
Lisebelisoa tse ling tse tloaelehileng tsa li-electro-optic modulators li kenyelletsa:
Ho fetola matla a lebone la laser, ho etsa mohlala, bakeng sa khatiso ea laser, ho rekota data ea dijithale ka lebelo le holimo, kapa likhokahano tsa lebelo le holimo;
E sebelisoa mecheng ea laser frequency stabilization, mohlala, ho sebelisa mokhoa oa Pound-Drever-Hall;
Q li-laser tsa boemo bo tiileng (moo EOM e sebelisetsoang ho koala laser resonator pele ho mahlaseli a pulsed);
Mokhoa o sebetsang oa ho notlela (EOM modulation cavity tahlehelo kapa mohato oa leseli la ho khutla, joalo-joalo);
Ho fetola li-pulse pickers, li-amplifiers tse ntle le li-lasers tse thellang.
Nako ea poso: Oct-11-2023