Imodyuli yeAcousto-optic: Ukusetyenziswa kwiikhabhinethi ze-athomu ezibandayo
Njengenxalenye ephambili yekhonkco ye-laser ye-fiber yonke kwikhabhathi ye-athomu ebandayo, ii-fiber optical acousto-optic imodyuliiya kubonelela ngelaser yokuqina kwamandla aphezulu kwikhabhathi yeathom ebandayo. Iiathom ziyakufunxa iifotoni kunye ne-resonant frequency ye-v1. Ekubeni amandla eefotoni kunye neeathom zichasene, isantya se-athomu siya kuncipha emva kokufunxa iifotoni, ngaloo ndlela kufezekiswa injongo yokupholisa ii-athomu. I-athomu epholileyo yeLaser, kunye neengenelo zazo ezifana nexesha elide lokuhlola, ukupheliswa kokutshintsha kwe-Doppler kunye nokutshintsha rhoqo okubangelwa kukungqubana, kunye nokudibanisa okubuthathaka kwebala lokukhanya lokubona, kuphucula kakhulu umlinganiselo ochanekileyo we-spectra ye-athom kwaye inokusetyenziswa ngokubanzi kwiiwotshi ze-athom ezibandayo, i-interferometers ye-athomu ebandayo, kunye nokuhamba kwe-atomic kwintsimi, kunye nokuhamba kwe-atomic.
Ingaphakathi le-fiber optical AOM i-acousto-optic modulator ikakhulu iqukethe i-acousto-optic crystal kunye ne-fiber collimator optical, njl. Ngokutshintsha iimpawu zegalelo ezifana ne-frequency kunye ne-amplitude ye-input modulated signal, i-frequency kunye ne-amplitude modulation ye-laser input iphunyeziwe. I-piezoelectric transducer iguqula izibonakaliso zombane kwiimpawu ze-ultrasonic ezihluka kwipatheni efanayo ngenxa yempembelelo ye-piezoelectric kwaye isasaza kwi-acousto-optic medium. Emva kokuba isalathiso se-refractive se-acousto-optic medium sitshintsha rhoqo, i-refractive index grating yenziwa. Xa i-laser idlula kwi-fiber collimator kwaye ingena kwi-acousto-optic medium, i-diffraction iyenzeka. Ukuphindaphinda kokukhanya okungafaniyo kugxininisa i-ultrasonic frequency kwi-original input laser frequency. Lungisa indawo ye-fiber optical fibre collimator ukwenza imodyuli yefiber acoust-optic isebenze kweyona ndawo ilungileyo. Ngeli xesha, i-Angle yesiganeko sesiganeko sokukhanya kufuneka sanelise imeko ye-Bragg diffraction, kwaye imodi ye-diffraction kufuneka ibe yi-Bragg diffraction. Ngeli xesha, phantse onke amandla okukhanya kwesiganeko adluliselwa kwisibane sokuqala se-diffraction.
I-modulator yokuqala ye-AOM ye-acouto-optic isetyenziswe kwisiphelo sangaphambili se-amplifier ye-optical system, ukumodareyitha ukukhanya okungenayo okuqhubekayo ukusuka kwisiphelo sangaphambili kunye neepulses ezibonakalayo. Iipulses zamehlo ezimodareyithiweyo emva koko zifake imodyuli yenkqubo yokukhulisa amandla okwandisa amandla. UmzuzwanaImodyuli ye-acouto-optic ye-AOMisetyenziswe ngasemva kwe-amplifier optical, kwaye umsebenzi wayo kukwahlula ingxolo yesiseko yesignali ye-optical pulse eyandisiweyo yinkqubo. Imiphetho yangaphambili nangasemva yokukhanya okuphuma kwepulses yimodyuli yokuqala ye-AOM ye-acouto-optic isasazwe ngokulinganayo. Emva kokungena kwi-amplifier optical, ngenxa yokuzuza kwe-amplifier yomgca ohamba phambili we-pulse uphezulu kunomda we-pulse trailing edge, i-pulses yokukhanya ekhutshiweyo iya kubonisa i-waveform distortion phenomenon apho amandla agxininiswe kumda ohamba phambili, njengoko kuboniswe kuMfanekiso 3. Ukwenza inkqubo ifumane i-optical optical kunye ne-edge yokuqala ye-AOM kunye ne-pulses yangaphambili kunye nokusabalalisa i-Ommetric back pulses kwi-pulses yangaphambili. imodyuli ye-acouto-optic kufuneka yamkele ukumodareyitha kwe-analog. Iyunithi yokulawula inkqubo ilungelelanisa umgca wokunyuka we-AOM yokuqala ye-acouto-optic modulator ukunyusa umgca wokunyuka kwe-pulse optical yemodyuli ye-acoust-optic kunye nokubuyisela ukuzuza okungafaniyo kwe-amplifier optical ngaphambili nangasemva kwimida ye-pulse.
I-amplifier ye-optical yenkqubo ayigcini nje ukwandisa iimpawu ezincedo ze-pulse optical, kodwa iphinda ikhulise ingxolo yesiseko sokulandelelana kwe-pulse. Ukufezekisa umlinganiselo we-signal-to-noise yenkqubo ephezulu, i-high extinction ratio ratio yefiber opticalImodyuli ye-AOMisetyenziselwa ukucinezela ingxolo yesiseko kwisiphelo esingasemva seamplifier, iqinisekisa ukuba i-pulse yesignali yesixokelelwano inokudlula ngokufanelekileyo ukuya kowona mgangatho mkhulu ngelixa ikhusela ingxolo yesiseko ekungeneni kwi-time-domain acousto-optic shutter (time-domain pulse gate). Indlela yokumodareyitha yedijithali yamkelwe, kwaye umqondiso wezinga leTTL usetyenziselwa ukulawula ukuphuma kunye nokuphuma kwemodyuli ye-acoust-optic ukuqinisekisa ukuba umgca wokunyuka kwexesha le-domain pulse yemodyuli ye-acoust-optic yinkqubo yokunyuka kwexesha lemveliso (oko kukuthi, ixesha elincinane lokunyuka elinokuthi imveliso ifumane), kunye nobubanzi be-pulse buxhomekeke kububanzi benqanaba le-TTL yobubanzi benkqubo.
Ixesha lokuposa: Jul-01-2025