Kev ua haujlwm siab electro-optic modulator: nyias zaj duab xis lithium niobate modulator

Kev ua haujlwm siab electro-optic modulator:zaj duab xis nyias lithium niobate modulator

Ib qho electro-optical modulator (EOM modulator) yog ib qho modulator ua los ntawm kev siv cov nyhuv electro-optical ntawm qee cov electro-optical crystals, uas tuaj yeem hloov cov teeb liab hluav taws xob ceev ceev hauv cov khoom siv sib txuas lus mus rau hauv cov teeb liab optical. Thaum lub electro-optic crystal raug rau lub teb hluav taws xob siv, qhov refractive index ntawm electro-optic crystal yuav hloov pauv, thiab cov yam ntxwv ntawm lub teeb liab optical ntawm lub crystal kuj yuav hloov pauv raws li, yog li ntawd thiaj li paub txog qhov modulation ntawm qhov amplitude, theem thiab polarization xeev ntawm lub teeb liab optical, thiab hloov cov teeb liab hluav taws xob ceev ceev hauv cov khoom siv sib txuas lus mus rau hauv lub teeb liab optical los ntawm kev modulation.

Tam sim no, muaj peb hom tseem ceebcov khoom siv hluav taws xob-optic modulatorsnyob rau hauv kev ua lag luam: silicon-based modulators, indium phosphide modulators thiab nyias zaj duab xislithium niobate modulatorNtawm lawv, silicon tsis muaj tus coefficient electro-optical ncaj qha, qhov kev ua tau zoo dua, tsuas yog tsim rau kev tsim cov ntaub ntawv luv luv transceiver module modulator, indium phosphide txawm hais tias tsim nyog rau kev sib txuas lus optical network transceiver module nruab nrab-ntev, tab sis cov txheej txheem kev koom ua ke yog qhov siab heev, tus nqi siab dua, daim ntawv thov yog raug rau qee qhov kev txwv. Nyob rau hauv kev sib piv, lithium niobate siv lead ua tsis yog tsuas yog nplua nuj nyob rau hauv photoelectric nyhuv, teeb photorefractive nyhuv, nonlinear nyhuv, electro-optical nyhuv, acoustic optical nyhuv, piezoelectric nyhuv thiab thermoelectric nyhuv yog sib npaug rau ib qho, thiab ua tsaug rau nws cov qauv lattice thiab nplua nuj defect qauv, ntau yam khoom ntawm lithium niobate tuaj yeem tswj tau zoo los ntawm cov khoom siv lead ua, cov ntsiab lus doping, valence xeev tswj, thiab lwm yam. Ua tiav kev ua tau zoo dua photoelectric, xws li electro-optical coefficient ntawm txog li 30.9pm / V, siab dua li indium phosphide, thiab muaj me me chirp nyhuv (chirp nyhuv: hais txog qhov tshwm sim uas zaus hauv lub pulse hloov pauv nrog lub sijhawm thaum lub sijhawm laser pulse kis tau tus txheej txheem. Ib tug loj chirp nyhuv ua rau hauv qis dua teeb liab-rau-suab nrov piv thiab ib tug nonlinear nyhuv), ib tug zoo extinction piv (qhov nruab nrab zog piv ntawm lub teeb liab "on" lub xeev mus rau nws "off" lub xeev), thiab zoo dua ntaus ntawv ruaj khov. Ntxiv mus, lub tshuab ua haujlwm ntawm cov zaj duab xis nyias lithium niobate modulator txawv ntawm cov silicon-based modulator thiab indium phosphide modulator siv cov txheej txheem nonlinear modulation, uas siv cov nyhuv linear electro-optical los thauj cov teeb liab hluav taws xob modulated rau ntawm lub optical carrier, thiab qhov modulation rate feem ntau yog txiav txim siab los ntawm kev ua haujlwm ntawm lub microwave electrode, yog li qhov ceev modulation siab dua thiab linearity nrog rau kev siv hluav taws xob qis dua tuaj yeem ua tiav. Raws li cov saum toj no, lithium niobate tau dhau los ua qhov kev xaiv zoo tshaj plaws rau kev npaj cov electro-optic modulators ua haujlwm siab, uas muaj ntau yam kev siv hauv 100G / 400G coherent optical communication networks thiab ultra-high-speed data centers, thiab tuaj yeem ua tiav qhov kev sib kis ntev ntawm ntau dua 100 kilometers.

Lithium niobate ua ib yam khoom siv hloov pauv ntawm "photon revolution", txawm hais tias piv nrog silicon thiab indium phosphide muaj ntau yam zoo, tab sis nws feem ntau tshwm sim hauv daim ntawv ntawm cov khoom siv loj hauv lub cuab yeej, lub teeb tsuas yog txwv rau lub dav hlau waveguide tsim los ntawm ion diffusion lossis proton pauv, qhov sib txawv ntawm refractive index feem ntau yog me me (kwv yees li 0.02), qhov loj ntawm lub cuab yeej yog loj heev. Nws nyuaj rau ua kom tau raws li qhov xav tau ntawm miniaturization thiab kev koom ua ke ntawmcov khoom siv kho qhov muag, thiab nws cov kab ntau lawm tseem txawv ntawm cov kab txheej txheem microelectronics tiag tiag, thiab muaj teeb meem ntawm tus nqi siab, yog li kev tsim cov yeeb yaj kiab nyias yog qhov kev taw qhia tseem ceeb rau lithium niobate siv hauv electro-optical modulators.