Lithium tantalate (LTOI) yakakwirira kumhanya electro-optic modulator

Lithium tantalate (LTOI) kumhanya kwepamusoroelectro-optic modulator

Global data traffic inoramba ichikura, inosundwa nekutorwa kwakapararira kwehunyanzvi hutsva hwakadai se5G uye artificial intelligence (AI), iyo inounza matambudziko akakosha kune transceivers pamatanho ese e optical network. Kunyanya, chizvarwa chinotevera electro-optic modulator tekinoroji inoda kuwedzera kukuru kwemazinga ekufambisa data kusvika ku200 Gbps mune imwe chiteshi ichideredza kushandiswa kwesimba uye mutengo. Mumakore mashoma apfuura, silicon photonics tekinoroji yakashandiswa zvakanyanya mumusika wekuona transceiver, kunyanya nekuda kwekuti silicon photonics inogona kugadzirwa-zhinji uchishandisa yakakura CMOS maitiro. Nekudaro, SOI electro-optic modulators inovimba nekupararira kwemutakuri inotarisana nematambudziko makuru mubandwidth, mashandisiro emagetsi, yemahara mutakuri absorption uye modulation nonlinearity. Dzimwe nzira dzetekinoroji muindasitiri iyi dzinosanganisira InP, yakaonda firimu lithium niobate LNOI, electro-optical polymers, uye mamwe akawanda-chikuva heterogeneous yekubatanidza mhinduro. LNOI inoonekwa semhinduro inokwanisa kuita yakanakisa mu Ultra-yakanyanya kumhanya uye yakaderera simba modulation, zvisinei, parizvino ine mamwe matambudziko maererano nehukuru hwekugadzira maitiro uye mutengo. Munguva ichangopfuura, boka racho rakatanga firimu rakatetepa lithium tantalate (LTOI) yakasanganiswa photonic chikuva ine yakanakisa photoelectric zvivakwa uye yakakura-yakakura kugadzira, iyo inotarisirwa kuenzanisa kana kutopfuura kuita kwe lithium niobate uye silicon optical mapuratifomu mune akawanda maapplication. Nekudaro, kusvika zvino, iyo yakakosha mudziyo weoptical communication, iyo yekupedzisira-yepamusoro yekumhanyisa electro-optic modulator, haina kusimbiswa muLTOI.

Muchidzidzo ichi, vatsvakurudzi vakatanga kugadzira LTOI electro-optic modulator, chimiro chayo chinoratidzwa mumufananidzo 1. Kuburikidza nekugadzirwa kwechimiro chega yega yega lithium tantalate pane insulator uye maparameter e microwave electrode, kupararira. kukurumidza kuenzanisa microwave uye chiedza wave mukatielectro-optical modulatorzvinoonekwa. Panyaya yekudzikisa kurasikirwa kweiyo microwave electrode, vatsvakurudzi mubasa iri kekutanga vakakurudzira kushandiswa kwesirivheri sechinhu che electrode ine conductivity iri nani, uye silver electrode yakaratidzwa kuderedza kurasikirwa kwemicrowave kusvika 82% zvichienzaniswa ne yakashandiswa zvakanyanya goridhe electrode.

FIG. 1 LTOI electro-optic modulator chimiro, chikamu chekufananidza dhizaini, microwave electrode kurasikirwa bvunzo.

FIG. 2 inoratidza zvishandiso zvekuedza uye mhedzisiro yeLTOI electro-optic modulator yeintensity modulatedkuona zvakananga (IMDD) mune optical communication systems. Zviyedzo zvinoratidza kuti LTOI electro-optic modulator inogona kufambisa masaini ePAM8 nechiyero che176 GBd ine yakayerwa BER ye3.8 × 10⁻² pazasi pe25% SD-FEC chikumbaridzo. Kune ese maviri 200 GBd PAM4 uye 208 GBd PAM2, BER yaive yakaderera zvakanyanya pane chikumbaridzo che15% SD-FEC uye 7% HD-FEC. Ziso uye histogram bvunzo inobuda muMufananidzo 3 zvinooneka zvinoratidza kuti LTOI electro-optic modulator inogona kushandiswa mumasisitimu ekukurumidzira ekutaurirana ane mutsara wepamusoro uye yakaderera bit kukanganisa mwero.

FIG. 2 Edza uchishandisa LTOI electro-optic modulator yeKusimba modulatedDirect Detection (IMDD) mu optical communication system (a) mudziyo wekuyedza; (b) Iyo yakayerwa bit kukanganisa mwero (BER) yePAM8(tsvuku), PAM4(girinhi) uye PAM2(yebhuruu) masaini sebasa rechiratidzo chechiyero; (c) Yakadhindwa inoshandiswa ruzivo rwehuwandu (AIR, dashed line) uye yakabatana net data rate (NDR, yakasimba mutsara) yezviyero ne-bit-error rate values ​​pasi pe25% SD-FEC muganhu; (d) Mepu dzemaziso uye nhamba dzehistograms pasi pePAM2, PAM4, PAM8 modulation.

Iri basa rinoratidza yekutanga-yepamusoro-kumhanya LTOI electro-optic modulator ine 3 dB bandwidth ye110 GHz. Mukusimba modulation yakananga kuona IMDD kutapurirana zviyedzo, mudziyo unowana imwe chete inotakura mambure data chiyero che405 Gbit/s, inofananidzwa nekuita kwakanyanya kwemapuratifomu aripo emagetsi emagetsi akadai seLNOI uye plasma modulators. Mune ramangwana, kushandisa zvakanyanya kuomaIQ modulatormadhizaini kana mamwe epamusoro masaini ekugadzirisa kukanganisa maitiro, kana kushandisa yakaderera microwave kurasikirwa substrates senge quartz substrates, lithium tantalate zvishandiso zvinotarisirwa kuwana kutaurirana mazinga e2 Tbit / s kana kupfuura. Yakasanganiswa neiyo LTOI yakanakira mabhenefiti, senge yakaderera birefringence uye chiyero mhedzisiro nekuda kwekupararira kwayo kushandiswa mune mamwe RF mafirita misika, lithium tantalate photonics tekinoroji ichapa yakaderera-mutengo, yakaderera-simba uye yekupedzisira-yepamusoro-kumhanya mhinduro kune inotevera-chizvarwa chakakwira. -speed optical communication network uye microwave photonics systems.