Modulator ea electro-optical (EOM) e laola matla, mokgahlelo le polarization ya lehlasedi la laser ka ho laola letshwao ka elektroniki.
E bonolo ka ho fetisisamodulator ea electro-optickemodulator ea mohatoe nang le lebokose le le leng feela la Pockels, moo tšimo ea motlakase (e sebelisitsoeng kristale ke electrode) e fetolang tieho ea mohato oa lehlaseli la laser ka mor'a hore e kene kristale. Boemo ba polarization ba lehlaseli la ketsahalo hangata bo hloka ho ba bo ts'oanang le e 'ngoe ea li-axes tsa optical tsa kristale e le hore boemo ba polarization ba lehlaseli bo se ke ba fetoha.
Maemong a mang ho hlokahala phetoho e nyane haholo ya mokgahlelo (nako le nako kapa nako le nako). Mohlala, EOM e sebediswa hangata ho laola le ho tsitsisa maqhubu a resonant a di-resonator tsa optical. Di-modulator tsa resonance hangata di sebediswa maemong ao ho hlokahalang phetoho ya nako le nako, mme botebo bo boholo ba modification bo ka fumanwa ka motlakase o itekanetseng feela wa ho kganna. Ka dinako tse ding botebo ba modification bo boholo haholo, mme sidelobe e ngata (jenereithara ya comb e bobebe, comb e bobebe) e hlahiswa ka hara spectrum.
Modulator ea polarization
Ho latela mofuta le tataiso ea kristale e seng mola, hammoho le tataiso ea tšimo ea motlakase ea 'nete, tieho ea mohato le eona e amana le tataiso ea polarization. Ka hona, lebokose la Pockels le ka bona lipoleiti tsa maqhubu a laoloang ke li-voltage tse ngata, 'me le ka boela la sebelisoa ho fetola maemo a polarization. Bakeng sa leseli la ho kenya le nang le polarized ka mola (hangata ka Angle ea 45° ho tloha mothating oa kristale), polarization ea mahlaseli a hlahisoang hangata e elliptic, ho fapana le ho potoloha feela ke Angle ho tsoa leseling la pele le nang le polarized ka mola.
Modulator ea Amplitude
Ha e kopantswe le dielemente tse ding tsa optical, haholoholo ka di-polarizers, mabokose a Pockels a ka sebediswa bakeng sa mefuta e meng ya modulation. Modulator ya amplitude ho Setshwantsho sa 2 e sebedisa lebokose la Pockels ho fetola boemo ba polarization, ebe e sebedisa polarizer ho fetola phetoho boemong ba polarization hore e be phetoho amplitude le matla a lesedi le fetisitsweng.
Mekhoa e meng e tloaelehileng ea li-modulator tsa electro-optic e kenyelletsa:
Ho fetola matla a lehlasedi la laser, mohlala, bakeng sa khatiso ea laser, ho rekota data ea dijithale ka lebelo le phahameng, kapa puisano ea optical ea lebelo le phahameng;
E sebelisoa mekhoeng ea ho tsitsisa maqhubu a laser, mohlala, ho sebelisoa mokhoa oa Pound-Drever-Hall;
Q switches ho li-laser tsa boemo bo tiileng (moo EOM e sebelisetsoang ho koala resonator ea laser pele ho mahlaseli a pulsed);
Ho notlela ha mokgwa o sebetsang (tahlehelo ya ho feto-fetoha ha modulation ya EOM kapa mohato wa lesedi la ho kgutla le ho kgutla, jj.);
Ho fetola di-pulse ho di-pulse picker, di-amplifier tse nang le maikutlo a matle le di-laser tse sekamisang.
Nako ea poso: Mphalane-11-2023