Lithium tantalate (LTOI) ihe na-eme ka electro-optic dị elu

Lithium tantalate (LTOI) ọsọ dị eluihe na-eme ka electro-optic modulator dị

Ọgbakọ data zuru ụwa ọnụ na-aga n'ihu na-eto, nke a na-akwalite site na nnabata sara mbara nke teknụzụ ọhụrụ dịka 5G na ọgụgụ isi artificial (AI), nke na-eweta nnukwu ihe ịma aka maka ndị transceivers na ọkwa niile nke netwọk anya. Karịsịa, teknụzụ electro-optic modulator ọgbọ na-abịa chọrọ mmụba dị ukwuu na ọnụego mbufe data ruo 200 Gbps na otu ọwa ebe ọ na-ebelata oriri ike na ọnụ ahịa. N'ime afọ ole na ole gara aga, ejirila teknụzụ silicon photonics mee ihe nke ukwuu n'ahịa transceiver optical, ọkachasị n'ihi eziokwu ahụ bụ na enwere ike imepụta silicon photonics site na iji usoro CMOS tozuru oke. Agbanyeghị, ndị na-eme ka SOI electro-optic modulators nke dabere na mgbasa nke ndị na-ebu ibu na-eche nnukwu ihe ịma aka na bandwidth, oriri ike, nnabata onye na-ebu n'efu na enweghị usoro nhazi. Ụzọ teknụzụ ndị ọzọ na ụlọ ọrụ ahụ gụnyere InP, thin film lithium niobate LNOI, electro-optical polymers, na ngwọta njikọta dị iche iche dị iche iche. A na-ewere LNOI dị ka ihe ngwọta nke nwere ike iru arụmọrụ kachasị mma na nnukwu ọsọ na obere ike modulation, agbanyeghị, ọ nwere ụfọdụ ihe ịma aka ugbu a n'ihe gbasara usoro mmepụta oke na ọnụ ahịa. N'oge na-adịbeghị anya, ndị otu ahụ wepụtara ikpo okwu photonic dị gịrịgịrị nke lithium tantalate (LTOI) nke nwere ezigbo ihe oyiyi fotoelectric na mmepụta buru ibu, nke a na-atụ anya na ọ ga-adaba ma ọ bụ karịa arụmọrụ nke ikpo okwu lithium niobate na silicon optical n'ọtụtụ ngwa. Agbanyeghị, ruo ugbu a, ngwaọrụ bụ isi nkenkwukọrịta anya, ihe na-eme ka electro-optic modulator dị oke ọsọ, ekwenyebeghị na LTOI.

N'ọmụmụ ihe a, ndị nchọpụta bu ụzọ chepụta ihe na-eme ka LTOI electro-optic modulator pụta ìhè, nke a na-egosi nhazi ya na Foto 1. Site na nhazi nke nhazi nke oyi akwa lithium tantalate ọ bụla na ihe mkpuchi ahụ na paramita nke electrode microwave, ọsọ mgbasa nke microwave na ebili mmiri ọkụ dị na ya.ihe na-eme ka ihe na-arụ ọrụ elektrọnik rụọ ọrụa na-emezu ya. N'ihe gbasara ibelata mfu nke electrode microwave, ndị nchọpụta n'ọrụ a tụrụ aro maka oge mbụ iji ọlaọcha mee ihe dị ka ihe electrode nwere njikwa ka mma, egosikwara na electrode ọlaọcha ahụ na-ebelata mfu microwave ruo 82% ma e jiri ya tụnyere electrode ọlaedo a na-ejikarị eme ihe.

FIG. 1 Nhazi LTOI electro-optic modulator, nhazi nhazi nkebi, ule mfu electrode na microwave.

FIG. 2 na-egosi ngwa nnwale na nsonaazụ nke LTOI electro-optic modulator makagbanwetụrụ ike ikenchọpụta kpọmkwem (IMDD) na sistemụ nkwukọrịta anya. Nnwale ndị a na-egosi na LTOI electro-optic modulator nwere ike izipu akara PAM8 na ọnụego akara nke 176 GBd yana BER a tụrụ nke 3.8 × 10⁻² n'okpuru oke SD-FEC 25%. Maka ma 200 GBd PAM4 na 208 GBd PAM2, BER dị obere karịa oke nke 15% SD-FEC na 7% HD-FEC. Nsonaazụ ule anya na histogram na Foto nke 3 na-egosi n'anya na enwere ike iji LTOI electro-optic modulator na sistemụ nkwukọrịta ọsọ ọsọ nwere oke linearity na obere ọnụego njehie bit.

FIG. 2 Nnwale site na iji LTOI electro-optic modulator makaAgbanwela ike ikeNchọpụta ozugbo (IMDD) na sistemụ nkwukọrịta anya (a) ngwaọrụ nnwale; (b) Oke njehie bit a tụrụ (BER) nke akara PAM8 (uhie), PAM4 (akwụkwọ ndụ akwụkwọ ndụ) na PAM2 (acha anụnụ anụnụ) dịka ọrụ nke ọnụego akara; (c) Oke ozi enwere ike iji wepụta (AIR, akara dashed) na ọnụego data net jikọtara ya (NDR, akara siri ike) maka nha nwere ụkpụrụ ọnụego bit-error n'okpuru oke SD-FEC 25%; (d) Maapụ anya na histograms ọnụọgụgụ n'okpuru modulation PAM2, PAM4, PAM8.

Ọrụ a na-egosi modulator elektrọnik LTOI mbụ dị elu nke nwere bandwit 3 dB nke 110 GHz. N'ime nnwale nnyefe IMDD kpọmkwem, ngwaọrụ ahụ na-enweta ọnụego data net nke 405 Gbit/s, nke a pụrụ iji tụnyere arụmọrụ kachasị mma nke nyiwe elektrọnik dị ugbu a dị ka LNOI na plasma modulators. N'ọdịnihu, iji ihe mgbagwoju anya karịa.Ihe nhazi IQatụmatụ ma ọ bụ usoro mmezi njehie mgbaàmà dị elu karị, ma ọ bụ site na iji obere ihe ndị na-efunahụ microwave dị ka quartz substrates, a na-atụ anya na ngwaọrụ lithium tantalate ga-enweta ọnụego nkwukọrịta nke 2 Tbit/s ma ọ bụ karịa. Tinyere uru ụfọdụ nke LTOI, dị ka obere birefringence na mmetụta nha n'ihi ojiji ya sara mbara na ahịa nzacha RF ndị ọzọ, teknụzụ lithium tantalate photonics ga-enye ngwọta dị ọnụ ala, obere ike na oke ọsọ maka netwọk nkwukọrịta ngwa anya na-esote na sistemụ microwave photonics.