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

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

Ib qho electro-optical modulator (EOM modulator) yog ib qho modulator tsim los siv cov nyhuv electro-optical ntawm qee yam electro-optical crystals, uas tuaj yeem hloov cov teeb liab hluav taws xob ceev hauv kev sib txuas lus rau hauv cov teeb liab kho qhov muag. Thaum lub electro-optic siv lead ua yog raug rau ib daim ntawv thov hluav taws xob, lub refractive index ntawm lub electro-optic siv lead ua yuav hloov, thiab lub optical yoj yam ntxwv ntawm cov siv lead ua yuav hloov raws li, raws li kom paub lub modulation ntawm lub amplitude, theem thiab polarization lub xeev ntawm lub optical teeb liab, thiab hloov lub high-ceev hluav taws xob teeb liab nyob rau hauv cov kev sib txuas lus ntaus ntawv mus rau hauv lub optical teeb liab los ntawm kev hloov.

Tam sim no, muaj peb yam tseem ceeb ntawmelectro-optic modulatorsntawm kev ua lag luam: silicon-based modulators, indium phosphide modulators thiab nyias zaj duab xisLithium niobate modulator. Ntawm lawv, silicon tsis muaj qhov ncaj qha electro-optical coefficient, kev ua tau zoo tshaj plaws, tsuas yog tsim nyog rau kev tsim cov ntaub ntawv luv luv transceiver module modulator, indium phosphide txawm hais tias tsim nyog rau nruab nrab-ntev kev sib txuas lus optical network transceiver module, tab sis cov txheej txheem kev sib koom ua ke yuav tsum siab heev, tus nqi kuj tseem ceeb, kev txwv qee yam. Nyob rau hauv sib piv, lithium niobate siv lead ua tsis tsuas yog nplua nuj nyob rau hauv photoelectric nyhuv, teem photorefractive nyhuv, nonlinear nyhuv, electro-optical nyhuv, acoustic optical nyhuv, piezoelectric nyhuv thiab thermoelectric nyhuv yog sib npaug zos rau ib tug, thiab ua tsaug rau nws cov qauv lattice thiab nplua nuj tsis xws luag, ntau yam khoom ntawm lithium niobate yuav ua tau zoo heev regulated los ntawm cov khoom siv hluav taws xob, siv lead ua, thiab lwm yam. kev ua tau zoo, xws li electro-optical coefficient txog li 30.9pm / V, ho siab dua indium phosphide, thiab muaj cov nyhuv chirp me me (chirp effect: yog hais txog qhov tshwm sim uas zaus hauv cov mem tes hloov nrog lub sij hawm thaum lub sij hawm laser mem tes kis tau tus mob. Ib tug loj chirp nyhuv tshwm sim nyob rau hauv ib tug qis dua cov nyhuv ntawm cov teeb liab-to-a piv ntawm lub teeb liab "on" xeev rau nws "tawm" xeev), thiab superior ntaus ntawv stability. Tsis tas li ntawd, cov txheej txheem ua haujlwm ntawm nyias zaj duab xis lithium niobate modulator yog qhov sib txawv ntawm cov silicon-based modulator thiab indium phosphide modulator siv cov txheej txheem nonlinear modulation, uas siv cov kab hluav taws xob-kho qhov muag los thauj cov teeb liab hluav taws xob hloov mus rau cov khoom siv kho qhov muag, thiab cov qauv ntsuas feem ntau yog txiav txim siab los ntawm kev ua tau zoo ntawm cov hluav taws xob siv hluav taws xob thiab kev siv hluav taws xob tsawg dua li cov khoom siv hluav taws xob. ua tiav. Raws li cov saum toj no, lithium niobate tau dhau los ua qhov kev xaiv zoo tshaj plaws rau kev npaj cov kev ua haujlwm siab electro-optic modulators, uas muaj ntau yam kev siv hauv 100G / 400G coherent optical kev sib txuas lus thiab ultra-high-speed data centers, thiab tuaj yeem ua tiav kev sib kis ntev tshaj li 100 kilometers.

Lithium niobate raws li cov khoom siv tsis zoo ntawm "photon kiv puag ncig", txawm hais tias piv nrog silicon thiab indium phosphide muaj ntau qhov zoo, tab sis nws feem ntau tshwm sim hauv daim ntawv ntawm cov khoom siv ntau hauv cov cuab yeej, lub teeb raug txwv rau lub dav hlau waveguide tsim los ntawm ion diffusion lossis proton pauv, qhov sib txawv ntawm qhov ntsuas qhov sib txawv yog feem ntau yog 00. Nws yog ib qho nyuaj rau ua 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 txheej txheem microelectronics tiag tiag, thiab muaj teeb meem ntawm tus nqi siab, yog li nyias zaj duab xis tsim yog ib qho tseem ceeb ntawm kev loj hlob ntawm lithium niobate siv hauv electro-optical modulators.