Mfundo yogwirira ntchito ya acousto-optic modulator

1. Mfundo yogwirira ntchito yamodulator ya acousto-optic
Pakati pa chipangizo chowongolera ma acousto-optic (AOM modulator)ndi mphamvu ya acousto-optic. Kapangidwe kake koyambira kamakhala ndi makhiristo a acousto-optic, ma transducer, zida zoyamwitsa, ndi ma driver. Mphamvu yamagetsi yotuluka ndi dalaivala imasinthidwa kukhala mafunde a ultrasonic ndi transducer. Mafunde a ultrasonic akafalikira mu acousto-optic medium, amayambitsa kusintha kwa nthawi ndi nthawi mu kuchuluka kwapakati, ndikupanga kapangidwe kofanana ndi phase grating. Kuwala kukadutsa mu medium iyi, diffraction imachitika, zomwe zimapangitsa kuti mafunde onyamula kuwala asinthe. Pali mitundu iwiri ya ma diffraction modes: Raman Ness diffraction ndi Bragg diffraction. AOM modulator yomwe imagwiritsidwa ntchito nthawi zambiri imagwira ntchito mu Bragg diffraction mode, pomwe kuwala kwa incident kumakhala incident pa ngodya inayake ya Bragg ndipo kuwala kotulutsa kumakhala ndi kuwala kopanda zero order ndi kuwala koyambirira kopanda deflection komwe kumakhala ndi ngodya yopingasa.
2. Magawo akuluakulu aukadaulo a acousto-optic modulator
2.1 Kugwira ntchito bwino kwa diffraction ndi kutayika kwa modulation: kumayesa kuthekera kwa chipangizo kusintha kuwala kwadzidzidzi kukhala kuwala koyambirira kosinthidwa ndi kutayika kwa kuwala komwe kumatsatira.
2.2 Ngodya ya Bragg: Ngodya yeniyeni yomwe imakwaniritsa bwino kwambiri diffraction, yomwe imagwirizana ndi kutalika kwa mafunde a laser, mafunde a wailesi, ndi liwiro la mawu mkati mwa kristalo.
2.3 Mphamvu yabwino kwambiri ya RF: mwachitsanzo mphamvu yokwanira, mphamvu yoyendetsera RF yofunikira kuti pakhale bwino kwambiri pakufalikira kwa ma diffraction. Fomula yeniyeni yowerengera yaperekedwa m'nkhaniyi.
2.4 Kusintha kwa ngodya ya Divergence: Kuti zitsimikizire kuti ikugwira ntchito bwino, ngodya ya divergence ya laser yochitika iyenera kufanana ndi mawonekedwe a acousto-optic medium.
2.5 Liwiro la kusintha kwa kuwala: nthawi zambiri limaimiridwa ndi nthawi yokwera kwa kuwala, kutengera nthawi yotumizira mafunde a mawu kudzera mu kuwalako, komanso yogwirizana ndi kukula kwa kuwalako ndi liwiro la mawu.
3. Ntchito zazikulu za ma modulators a acousto-optic
Ntchito zazikulu zisanu zaukadaulo wa acousto-opticndi:
3.1 Acousto optic Q-switch: ikayikidwa mkati mwa laser cavity, imapanga laser yamphamvu kwambiri yomwe imayendetsedwa ndi mphamvu posintha mwachangu kutayika kwa cavity.
3.2 Chosinthira/chosinthira cha Acousto optic: chimagwiritsidwa ntchito posintha mphamvu kapena kulamulira mwachangu laser kunja kwa laser cavity, ndipo chingagwiritsidwe ntchito ngati chotchingira kapena chotchingira chosinthika.
3.3 Cholepheretsa ma acoustic optic: Mwa kusintha ma radio frequency kuti atembenuke kuwala kwa laser, kusanthula mwachangu kumachitika, koyenera kuti munthu azitha kupeza mosavuta kapena kusanthula kosalekeza.
3.4 Acousto optic frequency shifter: yopangidwa makamaka kuti isunthire ma frequency a laser mmwamba kapena pansi, ndipo ikhoza kusunthidwa kuti ikwaniritse kuphatikiza ma frequency shift ovuta kwambiri.
3.5 Acousto optic Adjustable Fyuluta: Fyuluta yosinthika yamagetsi yokhazikika yomwe imatha kusankha mwachangu komanso mosinthasintha ma wavelength enaake kuchokera ku wide spectrumgwero la kuwala.