Tsegulani silicon photonic Mach-Zende modulator MZM

Yambitsani silicon photonic Mach-Zende modulatorMtengo wa MZM

TheMach-zende modulator ndiye gawo lofunikira kwambiri kumapeto kwa transmitter mu 400G/800G silicon photonic modules. Pakalipano, pali mitundu iwiri ya ma modulator kumapeto kwa transmitter ya ma silicon photonic modules opangidwa mochuluka: Mtundu umodzi ndi PAM4 modulator yotengera njira imodzi yogwirira ntchito ya 100Gbps, yomwe imakwaniritsa kutumiza kwa data ya 800Gbps kudzera mu njira yofanana ya 4-channel / 8 ndipo imagwiritsidwa ntchito makamaka m'malo opangira deta ndi Gpus. Zoonadi, njira imodzi ya 200Gbps silicon photonics Mach-Zeonde modulator yomwe idzapikisana ndi EML pambuyo pa kupanga misa pa 100Gbps sayenera kukhala kutali. Mtundu wachiwiri ndiIQ modulatoramagwiritsidwa ntchito pakulankhulana kwakutali kogwirizana kwa kuwala. Kumira kogwirizana komwe kwatchulidwa pakali pano kumatanthawuza mtunda wotumizira ma modules optical kuyambira makilomita zikwi zambiri mumsana wam'mbuyo kupita ku ZR optical modules kuyambira 80 mpaka 120 makilomita, komanso mpaka LR optical modules kuyambira makilomita a 10 m'tsogolomu.

Mfundo yothamanga kwambirisilicon modulatorsakhoza kugawidwa m'magulu awiri: optics ndi magetsi.

Gawo la Optical: Mfundo yayikulu ndi Mach-zeund interferometer. Kuwala kwa kuwala kumadutsa muzitsulo za 50-50 ndikukhala nthiti ziwiri za kuwala ndi mphamvu zofanana, zomwe zimapitiriza kufalikira m'manja awiri a modulator. Mwa kulamulira gawo pa mkono umodzi (ndiko kuti, refractive index ya silicon imasinthidwa ndi chotenthetsera kuti chisinthe liwiro la kufalikira kwa mkono umodzi), kuphatikiza kwa mtengo womaliza kumachitika pakutuluka kwa mikono yonse iwiri. Kutalika kwa gawo losokoneza (kumene nsonga za mikono yonse ikufika nthawi imodzi) ndi kulepheretsa kusokoneza (pomwe kusiyana kwa gawo kuli 90 ° ndipo nsonga zake zili moyang'anizana ndi mbiya) zitha kupezedwa mwa kusokonezedwa, potero kuwongolera mphamvu ya kuwala (yomwe imatha kumveka ngati 1 ndi 0 muzizindikiro za digito). Uku ndikumvetsetsa kosavuta komanso njira yoyendetsera malo ogwirira ntchito muntchito yothandiza. Mwachitsanzo, polumikizana ndi data, timagwira ntchito pamlingo wa 3dB wotsika kuposa pachimake, ndipo mukulankhulana kogwirizana, timagwira ntchito popanda kuwala. Komabe, njira iyi yoyendetsera kusiyana kwa gawo kupyolera mu kutentha ndi kutentha kwa kutentha kuti muwongolere chizindikiro chotulutsa chimatenga nthawi yaitali kwambiri ndipo sitingathe kukwaniritsa zofunikira zathu zotumizira 100Gpbs pamphindi. Chifukwa chake, tiyenera kupeza njira yoti tikwaniritse kusinthasintha kwachangu.

Gawo lamagetsi makamaka limakhala ndi gawo la PN junction lomwe limayenera kusintha refractive index pafupipafupi, komanso mawonekedwe a electrode wave wave omwe amafanana ndi liwiro la chizindikiro chamagetsi ndi chizindikiro cha kuwala. Mfundo yosinthira refractive index ndi plasma dispersion effect, yomwe imadziwikanso kuti free carrier dispersion effect. Zimatanthawuza za thupi kuti pamene ndende ya zonyamulira ufulu mu semiconductor zinthu zakuthupi kusintha, mbali zenizeni ndi zongopeka za nkhani mwini refractive index amasinthanso moyenerera. Pamene ndende yonyamulira muzinthu za semiconductor ikuwonjezeka, mayamwidwe a zinthuzo amawonjezeka pamene gawo lenileni la refractive index limachepa. Mofananamo, pamene zonyamulira mu semiconductor zipangizo kuchepa, mayamwidwe coefficient amachepetsa pamene gawo lenileni la refractive index kuwonjezeka. Ndichidziwitso chotere, muzogwiritsira ntchito, kusinthika kwa zizindikiro zamtundu wapamwamba kungathe kupezedwa mwa kulamulira chiwerengero cha onyamulira mu njira yotumizira mafunde. Pamapeto pake, ma siginecha a 0 ndi 1 amawonekera pamalo otulutsa, ndikukweza ma siginecha amagetsi othamanga kwambiri pamatalikidwe a mphamvu ya kuwala. Njira yokwaniritsira izi ndi kudzera pa mphambano ya PN. Zonyamula zaulere za silicon yoyera ndizochepa kwambiri, ndipo kusintha kwa kuchuluka sikukwanira kukwaniritsa kusintha kwa refractive index. Choncho, m'pofunika kuonjezera chonyamulira m'munsi mu kufala waveguide ndi doping silicon kukwaniritsa kusintha refractive index, potero kukwaniritsa apamwamba mlingo kusinthasintha.